816419-99-5Relevant academic research and scientific papers
Molecular gyroscopes: {Fe(CO)3} and {Fe(CO)2(NO)} + rotators encased in three-spoke stators; facile assembly by alkene metatheses
Shima, Takanori,Hampel, Frank,Gladysz
, p. 5537 - 5540 (2004)
Complexes to toy with: Ring-closing metathesis of the bis(phosphane) complexes 1a-c (n = 4-6) followed by hydrogenation gives the "molecular gyroscopes" 2a-c. The crystal structure of 2c and the NMR data for the analogous {Fe(CO)2(NO)}+/s
Synthesis, immobilization, MAS and HR-MAS NMR of a new chelate phosphine linker system, and catalysis by rhodium adducts thereof
Guenther,Reibenspies,Bluemel
experimental part, p. 443 - 460 (2011/04/16)
A new class of tridentate phosphine ligands with the general formula [MeP{(CH2)xPPh2}3]+I - (x=4, 7, 11) and [MeP(CH2PPh2) 3]+OTf-, has been synthesized and fully characterized. The linkers have been immobilized on silica with their phosphonium moieties via electrostatic interactions, and their mobility and leaching has been studied by solid-state HR-MAS (high-resolution magic angle spinning) NMR in various solvents. Immobilized Wilkinson-type rhodium complexes have been obtained by ligand exchange with the surface-bound linkers. The activities and lifetimes of the catalysts have been tested with respect to the hydrogenation of 1-dodecene. The rhodium catalyst precursor bound by the immobilized linker [MeP{(CH2)7PPh2} 3]+I- led to material with the highest activity and lifetime, and it could be recycled for 30atimes in a batchwise manner. The other catalysts show shorter lifetimes. For all catalysts the formation of rhodium nanoparticles with a narrow size distribution around 4anm has been proven.
Syntheses and palladium, platinum, and borane adducts of symmetrical trialkylphosphines with three terminal vinyl groups, P((CH2) mCH=CH2)3
Nawara-Hultzsch, Agnieszka J.,Skopek, Katrin,Shima, Takanori,Barbasiewicz, Micha,Hess, Gisela D.,Skaper, Dirk,Gladysz, John A.
experimental part, p. 414 - 424 (2010/10/01)
Reactions of Br(CH2)mCH=CH2 with Mg powder and then PCl3 (0.33 equiv.) afford P((CH2)m-CH=CH 2)3 (1; m = a, 4; b, 5; c, 6; d, 7; e, 8; f, 9; 52-87 %). Reactions of 1a-c, e with PdX2(COD) (X = Cl, Br) give trans-PdX 2(P((CH2)mCH=CH2)3) 2 (35-92 %). Reactions of 1b-e with PtCl2 in benzene give mainly trans-PtCl2(P((CH2)mCH=CH 2)3)2 (trans-5b-e; 52-75 %), whereas those with K2PtCl4 in water give mainly cis-5b-e (33-70 %). The reaction of equimolar quantities of 1c and H3B.S(CH3) 2 gives the 1 : 1 adduct H3B·P((CH 2)6CH=CH2)3 (85 %). In none of these transformations are by-products derived from the C=C linkages observed.
