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Synthesis and structural characterisation of [Mo(NNPh2)(NPh2) (mesityl)2(OC6F5)] and {[W(NNPh2)(NPh2)(OSiMe3)]2 (μ-Cl)2(μ-O)}: Isodiazene complexes with bulky amide groups arising via N-N bond cleavage

Lookup NU author(s): Emeritus Professor Bill Clegg, Dr Mark Elsegood

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Abstract

Reaction of [Mo(NNPh2)Cl3] with mesitylMgCl (mesityl = 2,4,6-Me3C6H2) followed by addition of pentafluorophenol affords the bis(alkylated) complex [Mo(NNPh2)(NPh2) (mesityl)2(OC6F5)] (1) in poor yield (20-30%). In the case of [WO2Cl2(dme)], reaction with Ph2NNH2·HCl in refluxing triethylamine/trimethylsilylchloride affords the binuclear complex {[W(NNPh2)(NPh2) (OSiMe3)]2(μ-Cl)2(μ-O)} (2) in good yield (approximately 75%). The crystal structures of 1 and 2 have been determined. In 1, the trigonal-bipyramidal Mo atom is coordinated by an axial linear isodiazene group trans to a pentafluorophenoxide ligand, whilst equatorial positions are occupied by two mesityl groups and an amide (NPh2) group. For 2, the molecule is best described as possessing a triply bridging (2x μ-Cl, μ-O) confacial bioctahedral geometry, with the longer bridging bonds trans to the isodiazene group The amide groups (NPh2) in each structure must arise through N-N bond cleavage. © 2001 Elsevier Science B.V.


Publication metadata

Author(s): Redshaw C, Clegg W, Elsegood MRJ

Publication type: Article

Publication status: Published

Journal: Polyhedron

Year: 2001

Volume: 20

Issue: 1-2

Pages: 119-123

Print publication date: 01/01/2001

ISSN (print): 0277-5387

ISSN (electronic): 1873-3719

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/S0277-5387(00)00606-9

DOI: 10.1016/S0277-5387(00)00606-9


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