Abstract
AbstractA new class of carbene‐like titanium complexes is easily accessible by means of a dilithiation–transmetallation sequence of a bisphosphonate. The X‐ray structure of the dimeric, organometallic compound 3 reveals a nano‐sized, multi‐layer aggregate with titanium‐metallated, trigonal planar carbon centers being devoid of Li contacts. DFT calculations show that the metallated carbon is a carbanion with only a slight carbene portion (10 %); the carbene character can be easily strengthened or weakened by varying the counterion. We anticipate that the sensitivity and flexibility to influence the electronic character of these carbene‐like carbanions offers a way to design new versatile reagents with variable chemical properties.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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