220526-41-0Relevant academic research and scientific papers
Synthesis and structural characterization of copper(I) halide complexes containing bis(azol-1-yl)methane derived bisphosphines
Bhat, Sajad A.,Mague, Joel T.,Balakrishna, Maravanji S.
, p. 243 - 250 (2016)
The copper(I) complexes containing bisphosphines such as bis(2-diphenylphosphinoimidazol-1-yl)methane (1), bis(5-diphenylphosphinopyrazol-1-yl)methane (2) and bis(5-diphenylphosphino-1,2,4-triazol-1-yl)methane (3) have been synthesized. The reaction of 1
Coordination of bis(azol-1-yl)methane-based bisphosphines towards RuII, RhI, PdII and PtII: synthesis, structural and catalytic studies
Bhat, Sajad A.,Pandey, Madhusudan K.,Mague, Joel T.,Balakrishna, Maravanji S.
, p. 227 - 241 (2016/12/28)
The coordination chemistry of bisphosphine ligands assembled on the five-membered heterocyclic platform of bis(azol-1-yl)methane viz.: bis(2-diphenylphosphinoimidazol-1-yl)methane (1), bis(5-diphenylphosphinopyrazol-1-yl)methane (2) and bis(5-diphenylphosphino-1,2,4-triazol-1-yl)methane (3) with RuII, RhI, PdII and PtII is described. The bisphosphines 1-3 react with elemental selenium to give the corresponding bis-selenoyl derivatives 4-6. The reactions of 1-3 with transition metal derivatives produce complexes with different coordination modes. Bisphosphine 1 showed a preference for the κ2-P,P mode of coordination, whereas bisphosphines 2 and 3, besides the κ2-P,P mode also showed a head-to-tail κ2-P,N coordination mode resulting in the formation of binuclear complexes [Rh2(COD)2{(CH2(1,2-C3H2N2PPh2)2)-κ2P,N}][BF4]2 (14), [Rh2(COD)2{(CH2(1,2,4-C2HN3PPh2)2)-κ2P,N}][BF4]2 (15), [Pd2(η3-C3H5)2{(CH2(1,2-C3H2N2PPh2)2)-κ2P,N}][BF4]2 (21) and [Pd2(η3-C3H5)2{(CH2(1,2,4-C2HN3PPh2)2)-κ2P,N}][BF4]2 (22). Several of these complexes have also been structurally characterized. The in situ generated RhI complex of bisphosphine 1 showed moderate to good selectivity in the hydroformylation of various styrene derivatives.
Gold(i) complexes of bisphosphines with bis(azol-1-yl)methane backbone: Structure of a rare dinuclear gold(i) complex [(Au2Cl){CH2(1,2-C3H2N2PPh2)2}3Cl]
Bhat, Sajad A.,Mague, Joel T.,Balakrishna, Maravanji S.
, p. 17696 - 17703 (2015/10/19)
Gold(i) complexes of bisphosphines assembled on the bis(azol-1-yl)methane platform viz.: bis(2-diphenylphosphinoimidazol-1-yl)methane (1), bis(5-diphenylphosphinopyrazol-1-yl)methane (2), bis(5-diphenylphosphino-1,2,4-triazol-1-yl)methane (3) have been de
New functionalized bis(pyrazol-1-yl)methane ligands. Synthesis, spectroscopic characterization of early and late transition metal complexes containing a functionalized N,N or P,P-chelate bis(5-diphenylphosphinopyrazol-1-yl)methane ligand
Antinolo, Antonio,Carrillo-Hermosilla, Fernando,Diez-Barra, Enrique,Fernandez-Baeza, Juan,Fernandez-Lopez, Maria,Lara-Sanchez, Agustin,Moreno, Andres,Otero, Antonio,Rodriguez, Ana Maria,Tejeda, Juan
, p. 3737 - 3743 (2007/10/03)
The multistep syntheses of the novel functionalized bis(pyrazol-1-yl)methane ligands, bis(5-diphenylphosphinopyrazol-1-yl)methane (bppzm) 1, bis(5-diphenylphosphinopyrazol-1-yl)trimethylsilylmethane (bppztm) 2 and bis-(2-diphenylphosphinoimidazol-1-yl)methane (bpizm) 3, have been studied. The coordinate capacity of the bppzm ligand towards a variety of early and late metal fragments was evaluated and seven metallacycles were isolated. The complex [{NbCl3(dme)}n] (dme = 1,2-dimethoxyethane) reacted with an excess of bppzm to give the binuclear complex [{NbCl3(bppzm)}2] 4, and in the same way the reaction of the mononuclear species [NbCl3(dme)(RC≡CR′)] with 1 gave the appropriate [NbCl3(bppzm)(RC≡CR′)] complexes (R = R′ = Ph 5; R = R′ = SiMe3 6; R = Ph, R′ = Me 7; R = Ph, R′ = SiMe3 8). In all these niobium complexes, 1 behaves as an N,N chelate ligand. Compound 1 reacts with [MCl2(PhCN)2] (M = Pd, Pt) to yield the complexes [MCl2(bppzm)] (M = Pd 9, Pt 10), where a P,P chelate behaviour for 1 was observed. A dynamic conformation of the six- and eight-membered metallacycles formed in the complexes was observed and variable-temperature NMR studies were carried out. Finally, the molecular structure of complex 10 was determined crystallographically and a distorted square-planar geometry was found in which a proton (Hendo) of the bridging methylene is in close proximity to the metal centre in the boat-boat conformation of the metallacycle.
