507-27-7Relevant articles and documents
Synthesis, characterization and DFT studies of electron-rich iridium(I) carbonyl complexes of an unsymmetrical phosphine–phosphine monoselenide ligand and their reactivity towards alkyl halides
Guha, Ankur Kanti,Nath, Jayashree,Saikia, Lakshi,Sarmah, Bhaskar Jyoti
, (2020/01/21)
A series of halocarbonyliridium(I) complexes of the type [Ir(CO)(P ~ Se)2X] (1) {where P-Se = 1,2-bis(diphenylphosphinomethaneselenide); X = Cl (1a), Br (1b), I (1c)} have been synthesized by the reaction of [Ir(CO)2X2]? with the ligand Ph2PCH2P(Se)Ph2. The complexes exhibit a single ν (CO) band in the region 1926 cm?1 which is significantly lower in frequency compared to Vaska's complex, trans-[Ir(CO)Cl(PPh3)2] (1965 cm?1), and substantiate the enhanced electron density at the metal centre. The complexes undergo oxidative addition (OA) reactions with electrophiles like CH3I and C2H5I to form Ir(III) alkyl species like [Ir(CO)R(P ~ Se)2IX]; [R = CH3 (2), C2H5 (3)] which exhibit ν (CO) bands in the region of 2070 cm?1. Kinetic measurements for the CH3I oxidative addition with complex 1a indicate a first order reaction. The complexes have been characterized by elemental analyses, IR and NMR spectroscopy. Density functional calculations reveal that the activation barrier for the OA is the lowest with 1a, which is also in tune with the experimental observations.
Synthesis of Some Dicyclohexyltin(IV) and Cyclohexylphenyltin(IV) Anionic Complexes
Bhattacharya, S. N.,Raj, Prem,Awasthi, V. K.
, p. 592 - 594 (2007/10/02)
Tetraalkylammonium, R4N (R = CH3, C2H5 or C4H9) and tetraphenyl-phosphonium, -arsonium and -stibonium salts of dicyclohexyl, dicyclohexylphenyl and cyclohexyldiphenyltin(IV)-halo or halo-pseudohalo anions nPh3-nSnX2 and CynPh3-nSnXY, where Cy = cyclo-C6H11, X = Cl, Br, I, N3 or NCS; Y = Br, I or NCS and n = 1 or 2> have been synthesised and characterized on the basis of melting points, elemental analyses and infrared spectra.Conductance measurements and values of Van't Hoff factor (i) suggest the presence of complex anions in the solution.Attempts to obtain complexes of the type and have been unsuccessful.
