The reaction of RuHCl(CO)L-2 (L = (PPr3)-Pr-i) with NO initially forms a 1:1 adduct, shown by DFT calculations and EPR spectroscopy (including the RuD isotopomer) to contain a bent (angleRu-N-O = 143.9) nitrosyl where the majority of the spin density is on the nitrosyl nitrogen. This radical adduct transforms further to give equimolar RuCl(NO)(CO)L-2 and RuHCl(HNO)(CO)L-2, the latter with hydride trans to the nitroxyl ligand HN=O. This is the first observation of the synthesis of coordinated HNO from NO itself. DFT calculations lead to the proposal that this H-atom transfer is effected by free NO2. and the lifetime of RuHCl(HNO)(CO)L-2 is indeed qualitatively dependent on the presence of free NO.
Self-Assembly and Substituent Effect of Copper(I) Complexes with 1,2-Bis(2-pyridylethynyl)benzene Ligands
作者:Tomikazu Kawano、Jun Kuwana、Ikuo Ueda
DOI:10.1246/bcsj.76.789
日期:2003.4
The reaction of 1,2-bis(2-pyridylethynyl)benzenes (L1–L5) with copper(I) ions proceeded smoothly to afford mononuclear copper(I) chelate complexes CL1–CL3 or dinuclear copper(I) molecular rectangular boxes, CL4 and CL5, in excellent yields, depending on the size of the substituent. If a ligand with a small substituent was used, the self-assembly of a mononuclear copper(I) chelate complex was achieved. If a ligand with a bulky substituent was used, the self-assembly of dinuclear copper(I) molecular rectangular boxes was achieved. The equilibrium between these two copper(I) complexes was also observed in solution.