Synthesis, stereochemistry and crystal structures of cobalt(III) complexes containing 5,8-diphenyl-2,11-dithia-5,8-diphosphadodecane or 5,9-diphenyl-2,12-dithia-5,9-diphosphatridecane

Kazuo Kashwabara, Yasuhiro Ito, Masakazu Kita, Junnosuke Fujita, Kiyohiko Nakajima

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Twelve new cobalt(III) complexes containing a tetradentate phosphine ligand of the type MeS(CH2)2PPh(CH2)nPPh(CH 2)2SMe (n = 2 L1 or 3 L2) were prepared. Their structures were assigned on the basis of electronic absorption and 1H NMR spectra and the molecular structures of cis-α-[CoCl2{rac(P)-L1}]BF4 and trans-[CoCl2{meso(P)-L2}]BF4 were determined by single-crystal X-ray diffraction. The last two complexes comprise a slightly distorted octahedron with bond distances Co-P 2.210(1), Co-S 2.254(1) and Co-Cl 2.281(1) and Co-P 2.227(3), Co-S 2.327(3) and Co-Cl 2.241(3) Å (all averages) respectively. The differences in Co-S and Co-Cl bond distances are attributable to the strong trans influence of the phosphino group. Acetylacetonate complexes of rac(P)-SPPS in organic solvents form equilibrium mixtures of the cis-α and cis-β isomers, the molar ratio in MeNO2 solution at 60°C being 2:1 for the L1 complex and 3:2 for the L2 complex.

Original languageEnglish
Pages (from-to)39-45
Number of pages7
JournalJournal of the Chemical Society - Dalton Transactions
Issue number1
Publication statusPublished - Jan 7 1997
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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