Synthesis and spectroscopic characterization of bromodioxotriphenylphosphine oxide (N,N -dialkyldithiocarbamate/ 0-alkyldithiocarbonate)molybdenum(VI) complexes and the crystal structure of 2,5-dimethylpyridium bromide

Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, N9B 3P4, Canada Department of Chemistry, University of Southampton, Highfield, Southampton, SO 17 1 BJ, UK Department of Pure and Applied Chemistry, M. D. S. University, Ajmer-305 009, Rajasthan, India E-mail : ratnaniraju@rediffmail.com Manuscript received 10 March 2008, accepted 4 June 2008 A new series of bromodioxomolybdenum(VI) complexes, MoO2Br(S2CNR2)(OPPh3) (NR2 = NEt2, N(i-Pr)2, NCH2(CH2)3CH2) and MoO2Br(S2COR)(OPPh3) (R = Et, n-Pr, i-Pr) were prepared by the reaction of dibromodioxobis(triphenylphosphineoxide)molybdenum(VI) with sodium/potassium salts of the corresponding dithiocarbamates or dithiocarbonates in 1 : 1 molar ratio in dichloromethane. These newly synthesized complexes were characterized on the basis of elements analysis and spectral (IR and 1H NMR) studies. The crystal structure of 2,5- dimethylpyridium bromide is also described. [CMeCHCHCMeCHNH]Br crystallizes as monoclinic in the space group P21/c with cell parameters a = 8.6591(9), b = 13.252(1), c = 7.258(1) Å, β = 101.94(1) 0 , V = 814.9(2) Å3, Z = 4, R = 0.0393, Rw = 0.0885