Triphenylantimony(v) Derivatives of 2,2-Disubstituted Benzothiazoline Ligands: Synthetic and Spectroscopic Studies

Abstract

The reactions of triphenylantimony(v) isopropoxide with 2,2-disubstituted benzothiazolines in a 1:2 molar ratio in refluxing benzene solution yielded the corresponding triphenylantimony(v) derivatives (1–5) of the type Ph₃Sb[SC₆H₄N: C(R)CH₂C(O)R']₂, [Where, R═CH₃, R'═CH₃(1); R═CH₃, R'═C₆H₅(2); R═CH₃, R'═4-CH₃C₆H₄(3); R═CH₃, R'═4-ClC₆H₄(4); and R═CF₃, R'═C₆H₅(5)]. All of these newly synthesized derivatives have been characterized by elemental analyses and molecular weight measurements as well as IR and NMR [¹H and ¹³C] spectral studies. On the basis of spectral data, seven-coordination around central antimony atom has been assigned to these derivatives.

Keywords:

• Triphenylantimony(v) derivatives
• benzothiazoline
• bidentate ligands
• seven coordinated antimony(v) atom

Acknowledgments

The award of a senior research fellowship to Pankaj K. Sharma by the University Grants Commission, New Delhi, is gratefully acknowledged.

Notes

*A singlet for CH₃ protons has been observed at δ 2.13 ppm.

* ¹³C signal for the CH₃ group has been observed at δ 25.67 ppm.