Formation and fac-mer isomerization of cationic phosphenium transition metal complexes formulated as [M(bpy)(CO)3{ Me}]+ (M  Cr, Mo, W) and [M(dppe)(CO)3{ Me}]+ (M  Mo, W)

Artigo Revisado por pares

Formation and fac-mer isomerization of cationic phosphenium transition metal complexes formulated as [M(bpy)(CO)3{ Me}]+ (M  Cr, Mo, W) and [M(dppe)(CO)3{ Me}]+ (M  Mo, W)

1994; Elsevier BV; Volume: 465; Issue: 1-2 Linguagem: Inglês

10.1016/0022-328x(94)87055-1

ISSN

1872-8561

Autores

Hiroshi Nakazawa, Yoshitaka Yamaguchi, Katsuhiko Miyoshi,

Tópico(s)

Metal complexes synthesis and properties

Resumo

In the reaction of [M(bpy)(CO)4] (M  Cr, Mo, W) with PN(Me)CH2CH2N Me(OMe) under reflux with toluene or xylene, fac- [M(bpy)(CO)3PN(Me)CH2CH2N Me(OMe)] is prepared, which reacts with BF3 · OEt2 to give, by OMe− abstraction from the phosphorus, a cationic phosphenium complex, fac-[M(bpy)(CO)3{PN(Me)CH2CH2NMe}]+. The facial isomer spontaneously isomerizes into its meridional form. The isomerization rate is in the order Cr > Mo > W. [M(dppe)(CO)3- [PN(Me)CH 2CH2N Me(OMe)] (M  Mo, W), which is prepared from [M(dppe)(CO)3(NCMe)] and PN(Me)CH2CH2NMe(OMe), also reacts with BF3 · OEt2 to give [M(dppe)(CO)3PN(Me)CH2CH2N Me]+, whose fac-mer isomerization is slower than that of the corresponding bpy complex.

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Formation and fac-mer isomerization of cationic phosphenium transition metal complexes formulated as [M(bpy)(CO)3{ Me}]+ (M  Cr, Mo, W) and [M(dppe)(CO)3{ Me}]+ (M  Mo, W)