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Metal carbido complex
A Metal carbido complex: is an organometall compound or coordination complex that contains the ligand C. Carbido complexes are a molecular subclass of carbides, which are prevalent. Carbido complexes represent models for intermediates in Fischer-Tropsch synthesis and related catalytic processes. They are also used as precursors for the synthesis of more complicated carbides. They are analogous to metal nitrido complexes.
==Terminal carbide ligands==
A terminal carbido complex is RuC(PCy3)2Cl2 with a Ru-C distance of 163 pm, typical for a triple bond. The complex can be obtained by metathesis of vinyl acetate to give () results in a metastable Ru(Cl2)(PCy3)2C2HOAc complex, which then decomposes eliminates acetic acid.
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The "naked" carbido ligand is weakly basic, forming complexes with other metal centers. The C-M bond is typically found to be around 1.65 angstroms. The 13CNMR resonance values for the carbido carbons vary widely, but range from δ211-406. An early example of a terminal carbido complex is Li(), which was prepared by deprotonation of the methylidyne precursor. X-ray crystallographic analysis reveals a Mo-C distance of 172 pm.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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