1152214-83-9Relevant academic research and scientific papers
The influence of substituents at C2 carbon atom of thiosemicarbazones {R(H)C2=N3-N2(H)-C 1(=S)-N1H2} on their dentacy in Pt II/PdII complexes: Synthesis, spectroscopy, and crystal structures
Lobana, Tarlok S.,Bawa, Gagandeep,Hundal, Geeta,Zeller
, p. 931 - 937 (2008)
The coordination chemistry of platinum(II) with a series of thiosemicarbazones {R(H)C2=N3-N2(H)-C 1(=S)-N1H2, R = 2-hydroxyphenyl, H 2stsc; pyrrole, H2ptsc; phenyl, Hbtsc} is described. Reactions of trans-PtCl2(PPh3)2 precursor with H2stsc (or H2ptsc) in 1:1 molar ratio in the presence of Et3N base yielded complexes, [Pt(η3- O, N3, S-stsc)(PPh3)] (1) and [Pt(η3- N4, N 3, S-ptsc)(PPh3)] (2), respectively. Further, trans-PtCl2(PPh3)2 and Hbtsc in 1:2 (M:L) molar ratio yielded a different compound, [Pt(η2- N3, S-btsc)(η1-S-btsc)(PPh3)] (3). Complex 1 involved deprotonation of hydrazinic (-N2H-) and hydroxyl (-OH) groups, and stsc2- is coordinating via O, N3, S donor atoms, while complex 2 involved deprotonation of hydrazinic (-N2H-) and -N 4H groups and ptsc2- is probably coordinating via N 4, N3, S donor atoms. Reaction of PdCl 2(PPh3)2 with Hbtsc-Me {C6H 5(CH3)C2=N3-N2(H)-C 1(=S)-N1H2} yielded a cyclometallated complex [Pd(η3-C, N3, S-btsc-Me)(PPh3)] (4). These complexes have been characterized with the help of analytical data, spectroscopic techniques {IR, NMR (1H, 31P), U.V} and single crystal X-ray crystallography (1, 3 and 4). The effects of substituents at C2 carbon of thiosemicarbazones on their dentacy and cyclometallation are emphasized.
