Synthesis and characterisation of a semipseudocloso carbaruthenaborane. Molecular structure of [1-(PhCC)-2-Ph-3-(cym)-3,1,2-semipseudocloso-RuC2B9H 9] (cym = p-cymene)

Rhodri Ll Thomas, Alan J. Welch

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The closo carbaborane 1-(PhCC)-2-Ph-1,2-C2B10H10 was readily decapitated to afford either [7-(PhCC)-8-Ph-7,8-C2B9H10]- or [7-(PhCC)-S-Ph-7,8-C2B9H9]2-. Reaction of the thallium(I) salt of the latter with [{RuCl2(cym)}2] (cym = p-cymene) yielded the unique semipseudocloso carbaruthenaborane [1-(PhCC)-2-Ph-3-(cym)-3,1,2-RuC2B9H9] characterised by multinuclear NMR spectroscopy (weighted average 11B chemical shift +2.41 ppm) and by single-crystal X-ray diffraction [C(1)-C(2) 2.184(7), Ru(3) ?B(6) 3.166(6) Å]. The semipseudocloso shape thus appears to lie between closo and pseudocloso, although somewhat closer to the latter. Confirmation of the structure strongly supports the idea of a continuum of cluster structures from closo to pseudocloso, the position of a molecule on which may be controlled by steric effects.

Original languageEnglish
Pages (from-to)631-635
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number4
Publication statusPublished - 21 Feb 1997

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