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Reaktionen von Komplexliganden, LI. Synthese und Reaktionen stabiler (Carben)tetracarbonyl‐Chelatkomplexe des Molybdäns
Author(s) -
Dötz Karl Heinz,
Larbig Harald,
Harms Klaus
Publication year - 1992
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19921250924
Subject(s) - chemistry , chelation , carbene , molybdenum , decarbonylation , medicinal chemistry , oxidative addition , stereochemistry , catalysis , organic chemistry
Reactions of Complex Ligands, LI [1] . – Synthesis and Reactions of Stable (Carbene)tetracarbonyl Chelate Complexes of Molybdenum The stable (carbene‐ C,O, ‐C,N , and ‐ C,S )tetracarbonyl chelate complexes of molybdenum 2b–2c have been obtained by mild decarbonylation of their corresponding pentacarbonyl precursors 1b–1c . The chelate complexes have been characterized by elemental analyses and spectroscopic data. In addition, the structure of C,N chelate 2c has been confirmed by X‐ray analysis. In contrast to its C,N and C,S analogues, the C,O chelate complex 2a undergoes ring opening at temperatures as low as ‐40°C upon addition of triphenylphosphane. At 20°C the phosphane‐substituted chelate complex 4a is obtained. C,N and C,S chelate complexes require higher temperatures for the reaction to give similar fac ‐tricarbonyl complexes 4b–4c .