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Characterization and electrochemical studies of molybdenum(VI) dioxodialkylbipyridyl complexes. X-ray crystal structure of MoO2(o-MeC6H4CH2)2(bipy)

✍ Scribed by Helena Teruel; Nilia Romero; Irene Henriquez

Publisher
Springer
Year
1995
Tongue
English
Weight
404 KB
Volume
20
Category
Article
ISSN
0340-4285

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✦ Synopsis

New MoVI-dioxodialkyl complexes, MoOzR2(bipy), R = CH2CH2Ph and p-MeC6H4CH2; bipy = 2,2'-bipyridine, have been synthesized. The i.r. and the 1H-n.m.r. spectra of these complexes are noted. The structure of MoO2(o-MeC6H4CH2)z(bipy ) was determined by X-ray analysis. Significant differences in the redox characteristics of these dioxodialkylcompounds are reflected in the contrasting patterns: whereas reduction of MoO 2-(CH/CH2Ph)z(bipy) is a reversible one-electron process, under similar conditions MoO2(p-MeC6H4CH2)2(bipy) and MoO2(o-MeC6H4CH2)2(bipy ) are reduced irreversibly. Similarly, solutions of MoO2(CHzCH2Ph)2(bipy ) remain unchanged but oxygenated organic products are formed from MoO2(p-MeC6H~CH2)2(bipy ) and MoO 2 (o-MeC6 H4CH2)2(bipy).

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The crystal structures of three dinuclear diperoxo compounds have been determined from single-crystal X-ray diffraction data. All title compounds crystallize as yellow needle-shaped crystals in the triclinic space group P 1(2). ( 1 where 2-MepyH denotes 2-methylopyridine, crystallize with a = 6.733