Synthesis and characterisation of pentacarbonyl(thiazolyl)manganese(0) complexes and their conversion to cationic 2,3-dihydro-thiazol-2-ylidene(pentacarbonyl)manganese(0) compounds

Raubenheimer H.G. ; Neveling A. ; Cronje S. ; Billing D.G. (2001)


Treatment of BrMn(CO)5 with the corresponding thiazolyllithium precursor produced [(CO)5Mn{C=NCH= CH3}] (1) or [(CO)5Mn{C=N(CH3)=CHS}] (2). Protonation or alkylation of 1 or 2 yields [(CO)5Mn{CN(H)CH=CHS}][CF3SO3] (3), [(CO)5- Mn{CN(H)C(CH3)=CHS}][CF3SO3] (4), [(CO)5Mn{CN(CH3)CH=CHS}][CF3SO3] (5) or [(CO)5Mn{CN(CH3)C(CH3)=CHS}] [CF3SO3] (6). The relatively long Mn-C(carbene) bond in the molecular structures of 3 [2.010(12) Å] and 4 [2.044(3) Å] and structural features of the 2,3-dihydro-thiazol-2-ylidene ligand, attest to stabilisation of the carbene ligand by π-bonding from the N atom and little π-acceptance by the ligand from the metal. © 2001 Elsevier Science Ltd. All rights reserved.

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