Thermal Decomposition of Platinum(IV)−Silicon, −Germanium, and −Tin Complexes
作者:Christopher J. Levy、Richard J. Puddephatt
DOI:10.1021/om970204x
日期:1997.9.1
The thermaldecomposition of a number of complexes of the type [PtMe2(Me3E)X(diimine)] (E = Si, Ge, Sn; X = Cl, Br, I) has been studied. The thermal stability of complexes, as determined by thermogravimetric analysis (TGA), varies depending on the diimine ligand in the order 2,2‘-bipyridyl (bpy) > 4,4‘-di-tert-butyl-2,2‘-bipyridyl (bpy-tbu2) > N-(2-(dimethylamino)ethyl)pyridine-2-aldimine (paen-me2)
Photoswitchable and pH responsive organoplatinum(<scp>ii</scp>) complexes with azopyridine ligands
作者:Mohamed E. Moustafa、Matthew S. McCready、Paul D. Boyle、Richard J. Puddephatt
DOI:10.1039/c7dt01290j
日期:——
Several platinum(II) complexes with ligands containing azo groups have been prepared and structurally characterised, and their photoswitching betweentrans and cis azo group isomers has been studied. The azo groups in the cationic complexes [PtMe(bipy)(4-NC5H4-N=N-4-C6H4X][PF6], X = H, OH or NMe2, and in the dicationic complex [Pt(bipy)(4-H2NC6H4-N=N-C6H5)2][OTf]2 undergo trans to cis photoswitching
HC-NN = 6-tert-butyl-2,2′-bipyridine, 7; 6-neo-pentyl-2,2′-bipyridine, 8; 6-phenyl-2,2′-bipyridine, 9; 6-(α-methyl)benzyl-2,2′-bipyridine, 10; 6-(α-ethyl)benzyl-2,2′-bipyridine, 11; 6-(α,α-dimethyl)benzyl-2,2′-bipyridine, 12]. Crystals suitable for X-ray analysis of complexes 5 and 7 were obtained. Ethene exchange at the cyclometalated platinum(II) complexes 7, 8, and 10−12 was studied by 1H NMR line-broadening
cyclometalated [Pt(N-N-C)Cl] complexes containing a number of terdentate N-N-C anionic ligands, derived from deprotonated alkyl-, phenyl-, and benzyl-6-substituted 2,2'-bipyridines. These rates have been compared with those of the corresponding [Pt(N-N)(C)Cl] (N-N = 2,2'-bipyridine; C = CH3 or C6H5) complexes having the same set of donor atoms but less constrained arrangements of the ligands. The reactions of
Cationicnitrileplatinum(II) complexes of formula [PtMe(RCN)(bipy)]+ undergo nucleophilic addition of carbanions −CH(COX)(COY) (X, Y= Me, OMe), −CH(CO2Me)CN and −CH(CN)2 to afford neutral products. According to the nature of the nucleophile, the organic ligand fragment displays either an imino enol or an enamine isomeric structure. The Pt−N bond can be cleaved upon reaction with acids with formation