A mononuclear organoruthenium complex of a polydentate thiosemicarbazone ligand and its utilization as a building block for the synthesis of heterodinuclear Ru-Pd and Ru-Pt complexes

作者：Dey Bikash Kali; Paul Piyali; Bhattacharya Samaresh^*

来源：Journal of the Indian Chemical Society, 2014, 91(3): 359-366.

• 2,6-Diacetylpyridine thiosemicarbazone
• Ru complex
• Ru-Pd and Ru-Pt complexes
• syntheses
• structures
• spectral properties

Reaction of 2,6-diacetylpyridine thiosemicarbazone with [Ru(CO)(2)(PPh3)(2)Cl-2] in refluxing ethanol affords a mononuclear ruthenium complex [Ru], in which the thiosemicarbazone is coordinated to ruthenium as dianionic CNS-donor, along with two triphenylphosphines and a carbonyl. Using the unutilized donor atoms in the free wing of the thiosemicarbazone in the [Ru] complex two hetero-bimetallic [Ru-Pd] and [Ru-Pt] complexes have been synthesized via reaction of the [Ru] complex with [Pd(PPh3)2Cl(2)] and [Pt(PPh3)(2)Cl-2] respectively. Structures of the [Ru] and [Ru-Pt] complexes have been determined by X-ray crystallography. Structure of the [Ru-Pd] complex has been optimized by DFT method. The free wing of the thiosemicarbazone in the [Ru] complex is utilized in binding to the second metal center in dianionic CNS-mode in the [Ru-Pd] and [Ru-Pt] complexes, and a triphenylphosphine has occupied the fourth coordination site on the second metal center. All the three complexes show characteristic IR and H-1 NMR spectra. They also display intense absorptions in the visible and ultraviolet regions.

• 出版日期2014-3