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Synthesis and Characterization of 2,6-Dipp 2 -H 3 C 6 SnSnC 6 H 3 -2,6-Dipp 2 (Dipp = C 6 H 3 -2,6-Pr i 2 ): A Tin Analogue of an Alkyne

2002; American Chemical Society; Volume: 124; Issue: 21 Linguagem: Inglês

10.1021/ja0257164

1943-2984

A.D. Phillips, Robert Wright, Marilyn M. Olmstead, Philip P. Power,

Organometallic Compounds Synthesis and Characterization

The reaction of Sn(Cl)C(6)H(3)-2,6-Dipp(2) (Dipp = C(6)H(3)-2,6-Pr(i)()(2)) with a stoichiometric amount of potassium in benzene affords 2,6-Pr(i)()(2)-H(3)C(6)SnSnC(6)H(3)-2,6-Pr(i)()(2) (1) as dark blue-green crystals. The compound 1 is a tin analogue of an alkyne. It was characterized by (1)H and (13)C NMR and UV-vis spectroscopy, cyclic voltammetry, combustion analysis and X-ray crystallography. The structural data show that 1 has a trans-bent, planar C(ipso)SnSnC(ipso) skeleton with a Sn-Sn bond distance of 2.6675(4) A and a Sn-Sn-C angle of 125.24(7) degrees. The Sn-Sn distance, which is ca. 0.15 A shorter than a conventional Sn-Sn single bond, and the trans-bent structure indicate the presence Sn-Sn multiple bond character unlike the related singly bonded ArPbPbAr species.