Novel syntheses of an aliphatic series of new dithiocarboxylates and perthiocarboxylates of copper (I) and some of their complexes with triphenylphosphine

ABSTRACT

Copper(I) alkyldithiocarboxylates (1a), (1b) and (1c) of formula [RCS₂Cu]₄ [(1a) R = t-Bu, (1b) R = n-Bu, (1c) R = sec-Bu] and copper(I) alkylperthiocarboxylates (2a), (2b) and (2c) of formula [RCS₃Cu]₄ [(2a) R = t-Bu, (2b) R = n-Pr, (2c) R = cyclohexyl] were prepared from the reaction of Grignard reagents with carbon disulfide, in the presence of CuBr. Cu(I) Dithiocarboxylates (1a) and (1b) were treated with triphenylphosphine to give, respectively, complexes (3a) and (3b) of formula RCS₂Cu(PPh₃)₂ [(3a) R = t-Bu, (3b) R = n-Bu]. The compounds obtained were characterized by various spectroscopic tools including NMR (¹H, ¹³C, ³¹P) spectroscopy, and single crystal X-ray diffraction.

GRAPHICAL ABSTRACT

KEYWORDS:

• Copper(I) dithiocarboxylates
• copper(I) perthiocarboxylates
• tetrameric clusters
• carbon disulfide
• Grignard reagents
• complexation

Acknowledgements

The authors are grateful to the Tunisian Ministry of Higher Education and Scientific Research for financial support. The authors also wish to thank the support provided by Dr. André Durif (Laboratoire d’études dynamiques et structurales de la sélectivité (LEDSS)), Université Joseph Fourier, Grenoble and Dr. Serge Masson (Laboratoire de Chimie Moléculaire et Thioorganique (LCMT)), Université de Caen Normandie for all the help brought for the realization of this work.

Disclosure statement

No potential conflict of interest was reported by the authors.