H. J. DE LIEFDE MEIJER, M. J. Janssen, G. J. M. van der Kerk,
... Several organic halides were found to add to Cp 2 V (II) . The reactions of benzyl chloride, ethyl ... studied in detail. Instead of the expected compound Cp 2 V (IV) RX (X = Cl, Br, I) the tervalent halide Cp 2 V (III) X was formed exclusively in the presence of excess alkyl halide. When excess Cp 2 V (II) was present, however, both Cp 2 V (III) X and Cp 2 V (III) R were found as reaction products. The following reaction equations are proposed: a) Cp 2 V + RX → [Cp 2 VRX]; b) [Cp 2 VRX] + Cp 2 V → Cp 2 VR + Cp 2 VX; c) ...
Tópico(s): Metal complexes synthesis and properties
1961 - Royal Netherlands Chemical Society | Recueil des Travaux Chimiques des Pays-Bas
... degenerate sandwich molecules, the d5(2E2g) metallocenes Mn(cp)2 and Fe(cp)2+ as well as the d7(2E1g) metallocenes Co(cp)2 and Ni(cp)2+ have been diluted in a large variety of ... included for comparison. Both substituted and unsubstituted Mn(cp)2 can be found in high-spin (6A1g) as ... lare metal-to-ring distances (e.g., Mg(cp)2), while the low-spin ground state is induced ... shorter metal-to-ring distances (e.g., Fe(cp)2, Ru(cp)2, Os(cp)2). Both the zero-field splittings of the high- ... Teller distortion increasing strongly along the series Fe(cp)2+ < Mn(cp)2 < Co(cp)2 < Ni(cp) ...
Tópico(s): Synthesis and Properties of Aromatic Compounds
1978 - Elsevier BV | Journal of Magnetic Resonance (1969)
Frank Bottomley, Ivan J. B. Lin,
Nitrogen mono-oxide (NO) rapidly oxidises TiIII(cp)2 complexes (cp =η-C5H5) according to the equations (i)–(iii) where 'Ti(cp)2O' refers to a polymeric oxide of TiIV. The oxidation ( ... amounts of an NCO complex. Excess of [Ti(cp)2(CO)2] and NO react in toluene at ... Ti(cp)2Cl}2O]+ N2O (i), 2[Ti(cp)2(NCO)]+ 2NO →[{Ti(cp)2(NCO)}2O]+ N2O (ii), [{Ti(cp)2}4(CO3)2]+ 4NO → 4 'Ti(cp)2O'+ 2N2O + 2CO2(iii), to give CO, [Ti(cp)2(NCO)], and 'Ti(cp)2O', along with traces of TiIII(cp)2 products. The NO(reacted) : CO(produced) ratio is ... and product analyses it is suggested that [Ti(cp)2(CO)2] and NO initially give an equilibrium ...
Tópico(s): Oxidative Organic Chemistry Reactions
1981 - Royal Society of Chemistry | Journal of the Chemical Society. Dalton transactions
Sonya Zabludoff, Abdul Karzai, William W. Wright,
Cyclic Protein-2 (CP-2) is synthesized in a stage-specific manner by mature rat Sertoli cells within stage VI and VII seminiferous tubules. To determine how testicular maturation affects CP-2 synthesis, we cultured 20 cm of tubules encompassing ... and 75 days old. The greatest increase in CP-2 synthesis was found to occur between 35 and ... two-dimensional gel analysis indicated that secretion of CP-2 increased from 35 to 45 days to a ... 2 and transferrin. Biochemical analysis also demonstrated that CP-2 synthesis was stage-specific by 45 days. Immunocytochemistry ...
Tópico(s): Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
1990 - Oxford University Press | Biology of Reproduction
John A. Hunter, W. Edward Lindsell, Kevin J. McCullough, Roger A. Parr, Myron Scholes,
... dihalides of niobium(IV) and tantalum(IV), [MX2(cp)2](M = Nb or Ta; X = Cl, Br, or ... via metathetical displacement of chloride ligands in [MCl2(cp)2] by bromide or iodide ions. The new, characterised bis(monothiobenzoate) complexes, [M(SCOPh)2(cp)2](M = Nb or Ta), have been synthesised from [MCl2(cp)2] and TI(SCOPh) in acetone. The molecular structure of [Ta(SCOPh)2(cp)2], determined by X-ray diffraction of a single ... relatively acute for a complex of type [MX2(cp)2] with a d1 electronic configuration. Comparative cyclic voltammetric ...
Tópico(s): Synthesis and characterization of novel inorganic/organometallic compounds
1990 - Royal Society of Chemistry | Journal of the Chemical Society. Dalton transactions
Bis-(cobalticenium)triiodocuprate(I), [Co(cp) 2 ] 2 [CuI 3 ]≡(1) and cobalticenium-triiododicuprate(I), [Co(cp) 2 ][Cu 2 I 3 ]=1/9{[Co(cp) 2 ]9[Cu 6 I 11 ] ∞ 2 [(Cu 6 ... 8 )2]}=(2) were obtained by reacting [Co(cp) 2 ]I with CuI in acetone 1 and acetonitrile ...
Tópico(s): Polyoxometalates: Synthesis and Applications
1989 - De Gruyter | Zeitschrift für Naturforschung B
William W. Wright, Sonya Zabludoff, Moira Erickson-Lawrence, Abdul Karzai,
... a novel Sertoli cell product, cyclic protein-2, (CP-2) and the generation of an antiserum against this ... a stage-specific change in the synthesis of CP-2 by Sertoli cells within intact seminiferous tubules; synthesis ... the cycle and minimal at stage XII. That CP-2 is a product of Sertoli cells was confirmed by immunohistochemical analysis. Comparison of CP-2 and transferrin synthesis by immature (17-day) and ... It was noteworthy, however, that the increase in CP-2 synthesis was much greater than the increase in ...
Tópico(s): Ovarian function and disorders
1989 - Wiley | Annals of the New York Academy of Sciences
Nikolaus Hebendanz, Frank H. Köhler, Franz Scherbaum, Björn Schlesinger,
... NMR spectra were recorded for the paramagnetic metallocenes Cp 2 M (M = V, Cr, Mn, Co, Ni). For Cp 2 V, Cp 2 Cr, Cp 2 Mn and Cp 2 Ni, a signal narrowing factor of 36–37 is observed on going from Cp 2 M‐ h 10 to Cp 2 M‐ d 10 , which is close to simple ... secondary isotope shift of 0.71 ppm. In Cp 2 Co‐ d 9 and ‐ d 8 , the residual ... 1.45 ppm are found for the pairs Cp 2 Mn‐ d 10 / h 10 , Cp 2 Co‐ d 10 / h 10 and Cp 2 ...
Tópico(s): Advanced Chemical Physics Studies
1989 - Wiley | Magnetic Resonance in Chemistry
Cyclic protein-2 (CP-2) is secreted in vitro in substantial amounts by mature rat Sertoli cells in intact Stage VI and Stage VII ... this hypothesis and to examine the steps in CP-2's biosynthesis, we generated a polyclonal antiserum against ... it to analyze the biosynthesis and secretion of CP-2. Analysis of the steps in the biosynthesis of CP-2 indicated that its polypeptide core represented most if not all of the translation product of the CP-2 mRNA and that a single asparginelinked oligosaccharide became ...
Tópico(s): Reproductive Biology and Fertility
1988 - Elsevier BV | Developmental Biology
Adam D. Miller, J.F. Tannaci, Samuel A. Johnson, Hyuk Lee, J.L. McBee, T. Don Tilley,
... 2 equivs of MesC[triple bond]CPh with Cp(2)Zr(eta(2)-Me(3)SiC[triple bond]CSiMe(3))(pyr) afforded the zirconacyclopentadiene Cp(2)Zr[2,5-Ph(2)-3,4-Mes( ... bond]CMes or PrC[triple bond]CMes with Cp(2)Zr(eta(2)-Me(3)SiC[triple bond] ... pyr) at ambient temperature gave the betabeta regioisomers, Cp(2)Zr[2,5-Me(2)-3,4-Mes(2)C(4)] and Cp(2)Zr[2,5-Pr(2)-3,4-Mes( ... reaction mixtures of PrC[triple bond]CMes and Cp(2)Zr(eta(2)-Me(3)SiC[triple bond] ... apparently thermodynamic) product under these reaction conditions was Cp(2)Zr[2,4-Mes(2)-3,5-Pr( ...
Tópico(s): Coordination Chemistry and Organometallics
2009 - American Chemical Society | Journal of the American Chemical Society
Wolfgang-Moritz Heupel, T. Müller, Athina Efthymiadis, Enno Schmidt, Detlev Drenckhahn, Jens Waschke,
... sequences of the control peptides CP-1 and CP-2 were RVDAE and N-Ac-CRVDAE-Aminohexan-RVDAEC- ... cadherin transinteraction with single (CP-1) and tandem (CP-2) peptides. The underlined peptide sequence denotes circularization via ... between the given cysteine residues. SP, TP, and CP-2 peptides were obtained from a commercial supplier (PSL ... were used at 200 μm and TP and CP-2 was used at 20 μm. Cell Culture and ... by TP. A control VE-cadherin tandem peptide (CP-2, 20 μm) did not alter Dsg transinteraction in ... and 108% ± 4%, respectively). The control tandem peptide CP-2 (20 μm), however, did not prevent PV-IgG- ...
Tópico(s): Coagulation, Bradykinin, Polyphosphates, and Angioedema
2009 - Elsevier BV | Journal of Biological Chemistry
Moira Erickson-Lawrence, Sonya Zabludoff, William W. Wright,
... studies demonstrated that secretion of Cyclic Protein-2 (CP-2) by mature rat Sertoli cells increased 30-fold ... compacted spermatids. Analysis of other organs revealed that CP-2 was also detectable in the epithelium of the ... a partial 1.8-kilobase (kb) cDNA for CP-2 mRNA, and sequence analysis revealed that CP-2 was the proenzyme form of the cysteine protease cathepsin L; this was corroborated by immunoprecipitation of CP-2 by anticathepsin L immunoglobulin G and by enzymatic analysis of purified CP-2. Northern analysis of testis mRNA revealed major (1. ...
Tópico(s): Selenium in Biological Systems
1991 - Oxford University Press | Molecular Endocrinology
Dawn C. Bregel, Susan M. Oldham, Richard Eisenberg,
The mechanism of dihydrogen addition to Cp(2)Ta(CH(2))(H) was examined using parahydrogen-induced polarization (PHIP), (13)C labeling, and comparison to the related complex Cp(2)Ta(CH(2))(CH(3)). The reaction of para-enriched hydrogen with Cp(2)Ta(CH(2))(H) leads to polarized resonances for both Cp(2)Ta(CH(3))(H)(2) and Cp(2)TaH(3), even at the earliest reaction times. Use of the labeled compound Cp(2)Ta((13)CH(2))(H) shows that the polarized resonances of Cp(2)Ta(CH(3))(H)(2) correspond to the ... 2) addition to an unsaturated Ta(III) intermediate, [Cp(2)Ta(CH(3))], rather than addition directly across ...
Tópico(s): Muon and positron interactions and applications
2002 - American Chemical Society | Journal of the American Chemical Society
Martin Theil, Peter Jutzi, Beate Neumann, Anja Stammler, Hans‐Georg Stammler,
... CpNiCl(PPh3) (4) leads to the silylnickel complex [Cp*2(Cl)Si]NiCp (5), in which an intramolecular ... results in the formation of the insertion products [Cp*2(Cl)Si]AuL (L=Ph3P (6), tBuNC (7), ... 9)). The thermolabile and air-sensitive silylgold complex {[Cp*2(Cl)Si]Au}n (10) is formed in ... L to 10 yields the complexes 6–9, [Cp*2(Cl)Si]AuPMe3 (11) and [Cp*2(Cl)Si]AuPEt3 (12). A π-interaction between ... CpNiCl(PPh3) (4) führt zu dem Silylnickel-Komplex [Cp*2(Cl)Si]NiCp (5), in welchem eine intramolekulare ... chlorid-Komplexen ClAuL führt zur Bildung der Einschiebungsprodukte [Cp*2(Cl)Si]AuL ( L = Ph3P (6), tBuNC (7), ...
Tópico(s): Organoboron and organosilicon chemistry
2002 - Elsevier BV | Journal of Organometallic Chemistry
Xiuhui Zhang, Qian‐Shu Li, Yaoming Xie, R. Bruce King, Henry F. Schaefer,
The structures for the binuclear Cp(2)Ti(2)(CO)(n) derivatives (Cp = eta(5)-C(5)H(5); n = 8, 7, 6, 5, 4, 3, 2) have ... Furthermore, the thermodynamics of CO dissociation, disproportionation into Cp(2)Ti(2)(CO)(n+1) + Cp(2)Ti(2)(CO)(n-1), and dissociation into mononuclear fragments of these Cp(2)Ti(2)(CO)(n) derivatives have been studied. An unbridged Cp(2)Ti(2)(CO)(8) structure with a long ... at 7 +/- 3 kcal/mol. The lowest energy Cp(2)Ti(2)(CO)(6) structure has two CpTi( ... of the M identical withM triply bonded series Cp(2)V(2)(CO)(5), Cp(2)Cr(2)( ...
Tópico(s): Synthesis and characterization of novel inorganic/organometallic compounds
2010 - American Chemical Society | Inorganic Chemistry
Luigi Busetto, M. Salmi, Stefano Zacchini, Valerio Zanotti,
... μ-CN(Me)(R)}(μ-CO)(CO)2(Cp)2][SO3CF3] (R = Me, 1a; Xyl, 1b; 4-C6H4OMe, ... Cβ(H)Cγ(H)(R′)}(μ-CO)(CO)(Cp)2] (R = Me, R′ = CN, 3a; R = Xyl, R′ = ... Cβ(R′)Cγ(H)(R″)}(μ-CO)(CO)(Cp)2] (R′ = H, R″ = C6H5, 3f; R′ = R″ = CO2Et, ... μ-CN(Me)(CH2Ph)}(μ-CO)(CO)2(Cp)2][SO3CF3] (1d) with acrylonitrile or methyl acrylate afford ... Cβ(H)Cγ(H)(R′)}(μ-CO)(CO)(Cp)2] (R′ = CN, 3h; CO2Me, 3i), respectively. The coupling ... CN(Me)(R)}(μ-CO)(CO)(NC–CHCH2)(Cp)2][SO3CF3] (M = Fe, R = Me, 4a; M = Fe, ... Cβ(H)Cγ(H)(R)}(μ-CO)(CO)(Cp)2][SO3CF3] (R = CN, 5a; R = CO2Me, 5b; R = ... Cβ(H)Cγ(H)(R)}(μ-CO)(CO)(Cp)2][SO3CF3] (R = CN, 6a; R = CO2Me, 6b; R = ...
Tópico(s): Magnetism in coordination complexes
2007 - Elsevier BV | Journal of Organometallic Chemistry
Vincenzo G. Albano, Luigi Busetto, Fabio Marchetti, Magda Monari, Stefano Zacchini, Valerio Zanotti,
... μ-CN(Me)(R)}(μ-CO)(CO)(NCMe)(Cp) 2 ][SO 3 CF 3 ] (R = Xy1, 1a; R = ... μ-CN(Me) (R)}(μ-CO)(CO)(X)(Cp) 2 ] complexes (R = Me, X = Br, 4a; R = Me, ... μ-CN(Me) (R)}(μ-CO)(CO)(NCMe)(Cp) 2 ][SO 3 CF 3 ] (M = Fe, R = Xy1, ... μ- CN(Me)(R)}(μ-CO)(CO)(P)(Cp) 2 ][SO 3 CF 3 ] (M = Fe, R = Xy1, ... μ-CN(Me)(Xyl)}(μ-CO)(CO)(NCR′)(Cp) 2 ][SO 3 CF 3 ] [R′ = Me, 1a; R′ = ... μ-CN(Me)(Xy1)}(μ-CO)(CO)(Ph)(Cp) 2 ] (8) and [Fe 2 {μ-CN(Me)(Xy1)}(μ-CO)(CO)(PPh 2 )(Cp) 2 ] (9), respectively. The molecular structure of 8 has ... Me)N(Me)(Xy1)}(μ-CO) 2 (CO)(Cp) 2 ] (10). Finally, the acetone complex [Fe 2 {μ- ...
Tópico(s): Synthesis and characterization of novel inorganic/organometallic compounds
2007 - De Gruyter | Zeitschrift für Naturforschung B
Noémi Barros, M. Schappacher, Paul Dessuge, Laurent Maron, Sophie M. Guillaume,
... 3 ] (Ln=Nd, Sm) or [Sm(BH 4 )(Cp*) 2 (thf)] (Cp*=η‐C 5 Me 5 ) proceeds ... that in the reaction of [Eu(BH 4 )(Cp) 2 ] with MMA the borate [Eu(Cp) 2 {(OBH 3 )(OMe)CC(Me) 2 }] ( e‐2 ) complex, which forms via the enolate [Eu(Cp) 2 {O(OMe)CC(Me) 2 }] ( e ), is ... that leads to the formation of carboxylate [Eu(Cp) 2 {OOCC(Me)(CH 2 )}] ( f ) is thermodynamically ... of the potential products from a Markovnikov [Eu(Cp) 2 {O(OMe)CCH(Me)(CH 2 BH 3 )}] ( g ) or anti‐Markovnikov [Eu(Cp) 2 {O(OMe)CC(Me 2 )(BH 3 )}] ( ... stabilization. The DFT calculations performed by using [Eu(Cp) 2 (H)] to model the mechanism previously reported for ...
Tópico(s): Radioactive element chemistry and processing
2007 - Wiley | Chemistry - A European Journal
Xiuhui Zhang, Qian‐Shu Li, Yaoming Xie, R. Bruce King, Henry F. Schaefer,
... CpV(CO) n ( n = 4, 3, 2, 1), Cp 2 V 2 (CO) 7 , and Cp 2 V 2 (CO) 6 have been studied by ... effects on the geometries. An optimized structure for Cp 2 V 2 (CO) 7 is found with one ... suggesting a single bond. Energetically competitive structures for Cp 2 V 2 (CO) 6 include a doubly symmetrically ... bridging carbonyl group. Thermodynamic considerations rationalize why neither Cp 2 V 2 (CO) 7 nor Cp 2 V 2 (CO) 6 have yet been synthesized. Thus Cp 2 V 2 (CO) 7 is predicted to be ... energy of the lowest lying singlet isomer from Cp 2 V 2 (CO) 6 to Cp 2 V ...
Tópico(s): Metal-Catalyzed Oxygenation Mechanisms
2007 - Wiley | European Journal of Inorganic Chemistry
Alexandru Lupan, R. Bruce King,
Theoretical studies show that the 10-vertex system Cp(2)Fe(2)C(2)B(6)H(8) ... the only one of the 2n skeletal electron Cp(2)Fe(2)C(2)B(n-4)H( ... B(6) polyhedron in all nine of the Cp(2)Fe(2)C(2)B(6)H(8) ... structures are also observed for the 11-vertex Cp(2)Fe(2)C(2)B(7)H(9). However, interspersed with these isocloso structures are Cp(2)Fe(2)C(2)B(7)H(9) ... more degree 6 vertices. For the 12-vertex Cp(2)Fe(2)C(2)B(8)H(10), ... 6 vertices, one for each iron atom. The Cp(2)Fe(2)C(2)B(8)H(10) ... mol above the global minimum. The 9-vertex Cp(2)Fe(2)C(2)B(5)H(7) ...
Tópico(s): Organoboron and organosilicon chemistry
2011 - American Chemical Society | Inorganic Chemistry
Zhong Zhang, Qian‐Shu Li, Yaoming Xie, R. Bruce King,
Abstract Theoretical studies on the cyclopentadienylvanadium carbonyl thiocarbonyls Cp 2 V 2 (CS) 2 (CO) n ( n = 5, ... donor bridging CS groups. Thus the lowest energy Cp 2 V 2 (CS) 2 (CO) 5 structures have ... and no vanadium–vanadium bond. The lowest energy Cp 2 V 2 (CS) 2 (CO) 4 structure has ... to a formal single bond. The lowest energy Cp 2 V 2 (CS) 2 (CO) 3 structures also ... single bridging η 2 -μ-CS group. Both Cp 2 V 2 (CS) 2 (CO) n ( n = 4 ... predicted to lie energetically above the disproportionation products Cp 2 V 2 (CS) 2 (CO) n +1 + Cp ...
Tópico(s): Organic and Molecular Conductors Research
2011 - Elsevier BV | Polyhedron
Vincenzo G. Albano, Luigi Busetto, Fabio Marchetti, Magda Monari, Stefano Zacchini, Valerio Zanotti,
... C(H)CN(Me)(R)}(μ-CO)(CO)(Cp)2][SO3CF3] (R=Me, R′ = SiMe3 (1a); R = Me, ... C(CN)N(Me)(R)}(μ-CO)(CO)(Cp)2] (3a–e), in good yields. Similarly, the diiron ... C(R′)CN(Me)(R)}(μ-CO)(CO)(Cp)2][SO3CF3] (R = R′ = Me (2a); R = Me, R′ = ... C(CN)N(Me)(R)}(μ-CO)(CO)(Cp)2] (9a–d). The reactions of the vinyliminium complex [ ... Tol)CHCN(Me)(4-C6H4CF3)}(μ-CO)(CO)(Cp)2][SO3CF3] (4) with NaBH4 and NBu4nCN afford the ... C(H)N(Me)(C6H4CF3)}(μ-CO)(CO)(Cp)2] (5) and the cyanoallylidene [Fe2{μ-C(Tol) ... C(CN)N(Me)(C6H4CF3)}(μ-CO)(CO)(Cp)2] (6), respectively. Analogously, the diruthenium vinyliminium complex [Ru2{ ...
Tópico(s): Synthesis and characterization of novel inorganic/organometallic compounds
2006 - Elsevier BV | Journal of Organometallic Chemistry
Ruiting Liu, Chunmei Zhang, Zhenyu Zhu, Jun Luo, Xigeng Zhou, Linhong Weng,
... ratio under the conditions involved. The reaction of [{Cp(2)LnNiPr(2)}(2)] with four equivalents of Ph( ... in toluene affords the unexpected enolization dearomatization products [Cp(2)Ln(OC{2,5-C(6)H(5)(== ... to a non-coordinated benzenoid nucleus. Treatment of [{Cp(2)LnNiPr(2)}(2)] with four equivalents of PhEtCCO ... conditions gives the unexpected enolization dearomatization/rearomatization products [{Cp(2)Ln(OC{C(6)H(4)(p-CHEtCONiPr( ... 2 b), Dy (2 c)). However, reaction of [{Cp(2)YbNiPr(2)}(2)] with PhEtCCO in THF forms ...
Tópico(s): Synthetic Organic Chemistry Methods
2006 - Wiley | Chemistry - A European Journal
Elizabeth A. Jacobs, Anna Fuller, Simon J. Coles, Garth A. Jones, Graham J. Tizzard, Joseph A. Wright, S.J. Lancaster,
... n)]. Reaction of the n=2 reagent with [Cp(2)ZrCl(2)] leads to disubstitution, but [Cp(2)Zr{NH(2)B(C(6)F(5))( ... equilibrium with the product of β-hydride elimination [Cp(2)Zr(H){NH(2)B(C(6)F( ... the major isolated solid. The analogous reaction with [Cp(2)HfCl(2)] gives a mixture of [Cp(2)Hf{NH(2)B(C(6)F(5))( ... H}(2)] and the N-H activation product [Cp(2)Hf{NHB(C(6)F(5 )(2)H}]. [Cp(2)Zr{NH(2)B(C(6)F(5))(2)H}(2)]·PhMe and [Cp(2)Hf{NH(2)B(C(6)F(5))( ... to the outside of the metallocene wedge. Exceptionally, [Cp(2)Hf{NH(2)B(C(6)F(5))( ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2012 - Wiley | Chemistry - A European Journal
Fernanda Cimadevilla, M. Esther Garcı́a, Daniel Garcı́a-Vivó, Miguel A. Ruiz, Claudia Graiff, António Tiripicchio,
... mixture of the electron-precise complexes [W(2)Cp(2)(μ-PPh(2))(2)(CO)(4)](BF(4))(2) and [W(2)Cp(2)(μ-PPh(2))(2)(CO)(3)(OH(2))]( ... to give the 32-electron cations [W(2)Cp(2)(Z)(μ-PPh(2))(2)(CO)](+) [Z = Br, ... to give the electron-precise derivatives [W(2)Cp(2)(μ-Z)(μ-PPh(2))(2)(CO)(2)](+). ... to give the sulfido hydride cation [W(2)Cp(2)(μ-H)(μ-PPh(2))(2)(S)(CO)](+). ... the corresponding sulfido and disulfido complexes [W(2)Cp(2)(μ-PPh(2))(2)(S)(CO)] and [W(2)Cp(2)(κ(2)-S(2))(μ-PPh(2))(2)(CO)]. Reactions of [W(2)Cp(2)(OH)(μ-PPh(2))(2)(CO)]BF(4) ...
Tópico(s): Inorganic Chemistry and Materials
2012 - American Chemical Society | Inorganic Chemistry
S. M. Maguire, M. Millar, Richard M. Sharpe, Philippa T. K. Saunders,
Cyclic protein 2 (CP-2) is a product of the Sertoli cell which is secreted in a cyclical manner according to the stage of ... of the germ cell complement on expression of CP-2 mRNA. Adult rats were treated with 650 mg/ ... later spermatocytes from most tubules, and expression of CP-2 mRNA was then assessed at various times after ... when particular germ cell types were depleted selectively. CP-2 mRNA was specifically localised to the Sertoli cells ... digoxigenin-labelled riboprobe. A stage specific variation in CP-2 mRNA levels was observed, with the mRNA being ...
Tópico(s): Sexual Differentiation and Disorders
1993 - Elsevier BV | Molecular and Cellular Endocrinology
T. Mehdoui, J.‐C. Berthet, P. Thuéry, Lionel Salmon, Éric Rivière, M. Ephritikhine,
Treatment of [Ce(Cp*)(2)I] or [U(Cp*)(2)I(py)] with 1 mol equivalent of bipy (Cp*=C(5)Me(5); bipy= ... 2'-bipyridine) in THF gave the adducts [M(Cp*)(2)I(bipy)] (M=Ce (1 a), M=U (1 b)), which were transformed into [M(Cp*)(2)(bipy)] (M=Ce (2 a), M=U (2 ... than in the lanthanide compound. Reaction of [Ce(Cp*)(2)I] or [U(Cp*)(2)I(py)] with 1 mol equivalent of terpy ( ... 2''-terpyridine) in THF afforded the adducts [M(Cp*)(2)(terpy)]I (M=Ce (3 a), M=U ( ... which were reduced to the neutral complexes [M(Cp*)(2)(terpy)] (M=Ce (4 a), M=U (4 ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2005 - Wiley | Chemistry - A European Journal
Evan L. Werkema, Elsa Messines, Lionel Perrin, Laurent Maron, Odile Eisenstein, Richard A. Andersen,
The monomeric metallocenecerium hydride, Cp'(2)CeH (Cp' = 1,2,4-tri-tert-butylcyclopentadienyl), reacts instantaneously with CH(3)F, but slower with CH(2)F(2), to give Cp'(2)CeF and CH(4) in each case, a ... not at all with CF(4), to give Cp'(2)CeF, H(2), and 1,2,4- and ... fluorocarbene fragment derived by alpha-fluoride abstraction from Cp'(2)CeCF(3). The fluoroalkyl, Cp'(2)CeCF(3), is generated by reaction of Cp'(2)CeH and Me(3)SiCF(3) or by ... inferred from the products of decomposition, which are Cp'(2)CeF, the isomeric tri-tert-butylbenzenes and in ...
Tópico(s): Hydrogen Storage and Materials
2005 - American Chemical Society | Journal of the American Chemical Society
T.A. Hanna, Anne M. Baranger, Robert G. Bergman,
Azametallacyclobutene Cp(2)ZrN-t-BuCEt=CEt (1) underwent an insertion reaction with CO to form the acyl complex 2 (Cp(2)Zr(N-t-BuCEtCEtCO), 67% yield). The addition of acetone to azametallacyclobutene 3 (Cp(2)Zr(NArCMeCPh), Ar = 2,6-dimethylphenyl) yielded the ... and O-bonded enolate complex of zirconocene 4 (Cp(2)Zr(NArCMeCPhH)(OCMeCH(2)), 76% yield). The addition ... into the Zr-C bond to form complexes Cp(2)Zr(NArCMeCPhCRHO) (8a) and Cp(2)Zr(NArCMeCPhC(i-Pr)HO (9) in 85% ( ... 73% yields, respectively. Similarly, treatment of metallacycle 10 (Cp(2)Zr(NArCEtCEt)) with benzaldehyde yielded the insertion product ...
Tópico(s): Asymmetric Hydrogenation and Catalysis
1996 - American Chemical Society | The Journal of Organic Chemistry
Steffen Seebald, Frank Möller, Ulrich Schubert, Guido Kickelbick,
... Different Main‐Group‐4 Ligands Reactions of Li[Cp 2 MSnPh 3 ] (M Mo, W) with CH 3 ... CH 2 ) n Br ( n 4,5) yield Cp 2 M(R)SnPh 3 [R CH 3 , Bu, ... 3 C(O)Cl give the hydrido complexes Cp 2 M(H)SnPh 3 . A silyl stannyl complex is only obtained from Li[Cp 2 WSnPh 3 ] and Me 3 SiOSO 2 CF ... reactions of chlorostannanes provide the bis(stannyl) complexes Cp 2 M(SnR′ 3 )SnPh 3 or Cp 2 M(SnR′ 2 Cl)SnPh 3 . R/Cl ... the chlorostannane is used. Upon reaction of Li[Cp 2 MSnPh 3 ] with Ph 3 PbCl only Cp 2 M(PbPh 3 )SnPh 3 is formed, while a mixture of Cp 2 M(PbMe 3 )SnPh 3 and Cp 2 ...
Tópico(s): Coordination Chemistry and Organometallics
1996 - Wiley | Chemische Berichte