Isomerization by ligand shuffling along a Cr24+ unit: Further reactions leading to cleavage of a quadruple bond

Rodolphe Clérac, F. Albert Cotton, Stephen P. Jeffery, Carlos A. Murillo, Xiaoping Wang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The paddlewheel complex Cr2(DpyF)4 (1), where DpyF = N,N′-di(2-pyridyl)formamidinate, has a short Cr-Cr distance of 1.938(2) Ä for the Cr≡Cr quadruple bond. In solution, there is a series of interconverting isomers, as determined by variable temperature 1H NMR studies. Compound 1 can be readily oxidized by CuCl2 to produce [Cr2(DpyF)4][CuCl2]2 (2) and [Cr2(DpyF)4CuCl3][CuCl2] (3). In both cases, the metal-metal quadruple bond is cleaved in favor of six-coordinate Cr(III) ions. Magnetic measurements for the oxidized products show that the chromium ions in the dichromium units exhibit strong antiferromagnetic interactions.

Original languageEnglish
Pages (from-to)3022-3027
Number of pages6
JournalDalton Transactions
Issue number15
DOIs
StatePublished - Aug 7 2003
Externally publishedYes

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