Synthesis and characterisation of pentacarbonyl(thiazolyl)manganese(0) complexes and their conversion to cationic 2,3-dihydro-thiazol-2-ylidene(pentacarbonyl)manganese(0) compounds: the crystal structures of [(CO)(5)Mn{CN(H)CHCHS}][CF3SO3] and [(CO)(

摘要

Treatment of BrMn(CO)(5) with the corresponding thiazolyllithium precursor produced [(CO)(5)Mn(c double bond NCH double bond CHS)] (1) or [(Co)(5)Mn(C double bondN(CH3)double bond CHS)] (2). Protonation or alkylation of 1 or 2 yields [(CO)(5)Mn(CN(H)CH double bond CHS))[CF3SO3] (3), [(CO)(5)Mn(C double bondN(CH3)double bond CHS)) [(CF3SO3] (4), [(CO)(5)Mn (CN(CH3)C double bond CHS)][CF3SO3] (5) or [(CO)(5)Mn(CN(CH3)C(CH3)double bond CHS)][CF3SO3] (6). The relatively long Mn-C(carbene) bond in the molecular structures of 3 [2.010(17) Angstrom] and 4 [2.044(3) Angstrom] and structural features of the 2. 3-dihydro-thiazol-2-ylidene ligand, attest to stabilisation of the carbene ligand by re-bonding from the N atom and little re-acceptance by the ligand from the metal. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 39]