An interesting metallacarborane cage closure and dismantling reaction including the facile halogenation of a cluster carbon atom: Structure of [1,2-(eta(5)-C5Me5)(2)-mu-1,2-H-closo-1,2,3-Rh2CB4H4-3-I]

摘要

Cage closure, together with the loss of two boron vertices, of [2,5-(eta(5)-C5Me5)(2)-10-Me-mu-2,5-H-)nido-2,5,1-Rh,CB6H8] (1) using an approximately molar equivalent of elemental iodine and excess triethylamine results in the formation of a new species [1,2-(eta 5-C5Me5)2-mu-1,2-H-closo-1,2,3-Rh2CB4H4-3-I] (2), which is characterized by multinuclear NMR spectroscopy, mass spectrometry, and single-crystal X-ray crystallography. The formation Of Compound 2 involves the elimination of a {B2CH3) moiety from I and an iodination of the single carbon vertex. (c) 2005 Elsevier B.V. All rights reserved.