Synthetic, spectroscopic, X-ray structural and antimicrobial studies of 1,3-dithia-2-stibacyclopentane derivatives of phosphorus based dithiolato ligands

Some mixed 1,3-dithia-2-stibacyclopentane derivatives with phosphorus based dithiolato ligands of the types (SCH

2

CH

2

SS)bS(S) (POGO) {where G = -CH(Me)-CH(Me)- and -C(Me)

2

-C(Me)

2

-} and (SCH

2

SS)bS(S)P(OR)

2

{where R = Pr

n

, Bu

n

and Ph} have been synthesized by the reaction of 2-chloro-1,3-dithia-2-stibacyclopentane and the ammonium/sodium salt of the corresponding phosphorus based ligands in an equimolar ratio in anhydrous benzene solution. These yellow crystalline solid/semi-solid derivatives have been characterized by elemental analysis (C, H, S and Sb), molecular weights, melting point as well as spectral [UV, IR and NMR (

1

H,

13

C and

31

P)] studies. Single crystal X-ray diffraction analyses of 1,3-dithia-2-stibacyclopentane 2,3-butylenedithiophosphate revealed a monodentate mode of bonding of the dithiophosphate ligand in the complex. The free ligands and their antimony(III) complexes have also been screened for their antibacterial and antifungal activities.