Spin crossover in chromium(II) complexes and the crystal and molecular structure of the high spin form of bis[1,2-bis(diethylphosphino)ethane]di-iodochromium(II)
作者:Dost M. Halepoto、David G. L. Holt、Leslie F. Larkworthy、G. Jeffery Leigh、David C. Povey、Gallienus W. Smith
DOI:10.1039/c39890001322
日期:——
From the variation of magnetic properties with temperature trans-bis[1,2-bis(diethylphosphino)ethane]-di-iodochromium(II) undergoes a sharp S= 2 to S= 1 spin-state transition between 165 and 175 K.
Catalytic dinitrogen reduction to hydrazine and ammonia using Cr(N<sub>2</sub>)<sub>2</sub>(diphosphine)<sub>2</sub> complexes
作者:Charles H. Beasley、Olivia L. Duletski、Ksenia S. Stankevich、Navamoney Arulsamy、Michael T. Mock
DOI:10.1039/d4dt00702f
日期:2024.4.16
The synthesis, characterization of trans-[Cr(N2)2(depe)2] (1) is described. 1 and trans-[Cr(N2)2(dmpe)2] (2) catalyze the reduction of N2 to N2H4 and NH3 in THF using SmI2 and H2O or ethylene glycol as proton sources. 2 produces the highest total fixed N for a molecular Cr catalyst to date.
bidentate phosphines [bis(dimethylphosphino)methane (dmpm); 1,2-bis(diethylphosphino)ethane (depe); 1,3-bis(diethylphosphino)propane (depp); 1,2-bis(dicyclohexylphpsphino)ethane (dcpe)] in toluene or diethyl ether as solvent. Single crystals of the complex CrCl2(depe)2 were obtained by recrystallization from toluene at low temperature; the structure of the complex was determined by X-ray diffraction and compared