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Reactions of Cyclohexyl Isocyanide with η5-Substituted Cyclo-pentadienyl MoMo Triply Bonded Complexes. Crystal Structure of [Mo(CO)2(η5-C5H4CO2CH3)]2(μ-η2-CNC6H11)

✍ Scribed by Qingshan Li; Chuncheng Luo; Licheng Song

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
116 KB
Volume
27
Category
Article
ISSN
0256-7660

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✦ Synopsis

Abstract

Reactions of one or two equiv. of cyclohexyl isocyanide in THF at room temperature with MoMo triply bonded complexes [Mo(CO)~2~(η^5^‐C~5~H~4~R)]~2~ (R=COCH~3~, CO~2~CH~3~) gave the isocyanide coordinated MoMo singly bonded complexes with functionally substituted cyclopentadienyl ligands, [Mo(CO)~2~(η^5^‐C~5~H~4~R)]~2~(μ‐η^2^‐CNC~6~H~11~) (1a, R=COCH~3~; 1b, R=CO~2~CH~3~) and [Mo(CO)~2~(η^5^‐C~5~H~4~R)(CNC~6~H~11~)]~2~ (2a, R=COCH~3~; 2b, R=CO~2~CH~3~), respectively. Complexes 1a, 1b and 2a, 2b could be more conveniently prepared by thermal decarbonylation of MoMo singly bonded complexes [Mo(CO)~3~(η^5^‐C~5~H~4~R)]~2~ (R=COCH~3~, CO~2~CH~3~) in toluene at reflux, followed by treatment of the resulting MoMo triply bonded complexes [Mo(CO)~2~(η^5^‐C~5~H~4~R)]~2~ (R=COCH~3~, CO~2~CH~3~) in situ with cyclohexyl isocyanide. While 1a, 1b and 2a, 2b were characterized by elemental analysis and spectroscopy, 1b was further characterized by X‐ray crystallography.

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