Triple bridged anionic dimetallic complexes from cis-[Mo(η3-methallyl)Cl(CO)2(NCMe)2] and pyrazolates

The reactions of cis-[Mo(η3-methallyl)Cl(CO)2(NCMe)2] and 0.5 equivalents of tetra-n-butylammonium salts of pyrazolate (pz), 3,5-dimethylpyrazolate (dmpz) or indazolate (inz) lead to NnBu4[{Mo(η3-methallyl)(CO)2(μ-Cl)}2(μ-pz*)] (pz* = pz, dmpz, inz), where the bridging pyrazolato is coordinated trans to the allyl group and both bridging chlorido ligands are coordinated trans to the carbonyls.