摘要 : Hydride-pyrazolato ReH(Rpz)(HRpz)(NO)(PPh3)(2) complexes (R = H (1), 5-Me (2)) were prepared by allowing the ReH2(NO)(PPh3)(3) derivative to react with pyrazole (HRpz) in refluxing toluene. The complexes were characterised spectro... 展开 Hydride-pyrazolato ReH(Rpz)(HRpz)(NO)(PPh3)(2) complexes (R = H (1), 5-Me (2)) were prepared by allowing the ReH2(NO)(PPh3)(3) derivative to react with pyrazole (HRpz) in refluxing toluene. The complexes were characterised spectroscopically (IR and NMR data) and by the X-ray crystal structure determination of the ReH(5-Mepz)(H-5-Mepz)(NO)(PPh3)(2) derivative. An intramolecular hydrogen bond N-H center dot center dot center dot N between the pyrazolato and the pyrazole ligands was established both in the solid state and in solution. Protonation reaction with Bronsted acid of compound I was studied and led to the unstable bis(pyrazole) [ReH(HPZ)(2)(NO)(PPh3)(2)](+) cation. Acetylide-pyrazolato Re(C equivalent to CAr)(Rpz)(HRpz)(NO)(PPh3)(2) (3, 4) complexes (Ar = Ph, p-tolyl; R = H, 5-Me) were also prepared by reacting hydride ReH(Rpz)(HRpz)(NO)(PPh3)(2) species with terminal alkynes HC equivalent to CAr in refluxing 1,2-dichloroethane. (c) 2005 Elsevier B.V. All rights reserved. 收起