353291-86-8Relevant academic research and scientific papers
Reaction of Ru(PPh3)3Cl2 with 2-(arylazo)pyrimidines. Spectral and redox characterisation of the products. Part V. Single crystal X-ray structure of Ru(PPh3)2(papm)Cl2 (papm = 2-(phenylazo)pyrimidine)
Santra, Prasanta Kumar,Sinha, Chittaranjan,Sheen, Wen-Jyh,Liao, Fen-Ling,Lu, Tian-Huey
, p. 599 - 606 (2001)
Reaction of 2-(arylazo)pyrimidine (aapm) with Ru(PPh3)3Cl2 in CH2Cl2 solution affords [Ru(PPh3)2(aapm)Cl2] (2) while the reaction under refluxing conditions in EtOH isolates [Ru(PPh3)2(aapm)2] (ClO4)2·H20 (3/4). Single crystal X-ray diffraction study of dichloro-bis(triphenylphosphine) (2-(phenylazo)pyrimidine)ruthenium(II) has assigned a cis-Ru(PPh3)2 motif to the complex. Isomers of [Ru(PPh3)2(aapm)2] (ClO4)2 have been characterised by 1H NMR data and they exist in cis-trans-cis and cis-cis-cis configurations in which coordination is considered with reference to three pairs of sequence of P, P (PPh3 abbreviated as P), N, N (N is N(pyrimidine)) and N′, N′ (N′ is N(azo)). The complexes exhibit MLCT transitions in the visible region. Redox studies show the Ru(III)/Ru(II) couple is in the range 0.8-1.2 V vs. SCE and [Ru(PPh3)2(aapm)2](ClO4)2 exhibits a higher potential value than that of [Ru(PPh3)2(aapm)Cl2].
