Dialkyldithiocarbamate platinum(II) complexes of [Pt(S2CNR2)2] (R = iso-C3H7, iso-C4H9): Preparation, 13C CP-MAS NMR, molecular structure, supramolecular self-assembly and thermal behaviour

Two new dialkyldithiocarbamato platinum(II) complexes of [Pt(S2CNR)(2)], R = iso-C3H7 (1) and iso-C4H9 (2), have been prepared and characterised using C-13 CP-MAS NMR. The crystal and molecular structures of the isolated compounds were established by single-crystal X-ray diffraction. The unit cell of 1 contains four centrosymmetric discrete molecules of [Pt{S2CN(iso-C3H7)(2)}(2)], of which the pairs are structurally inequivalent to each other (hereafter denoted as molecules 1a and 1b). At the supramolecular level, due to numerous intermolecular C-H center dot center dot center dot S hydrogen bonds, the la molecules form linear polymeric ribbons, whose interaction with the 1b molecules results in a two-dimensional polymeric network. In the structure of 2, the construction of supramolecular zigzag chains by non-centrosymmetric molecules of [Pt{S2CN(iso-C4H9)(2)}(2)] is determined by intermolecular C-H center dot center dot center dot Pt anagostic interactions. The thermal behaviour of crystalline compounds 1 and 2 was studied by simultaneous thermal analysis (STA), a combination of the TG and DSC techniques, under an argon atmosphere. In both cases, platinum(II) sulfide (PtS) was identified as the main end-product upon thermal decomposition of the complexes at 600 degrees C. (C) 2019 Elsevier Ltd. All rights reserved.