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Summary Diphenyl(2-pyridyl)phosphine (PPh2pyl), phenylbis(2-pyridyl)-phosphine (PPhpyl2) and tris(2-pyridyl)-phosphine (Ppyl3) react with [Rh(acac)(CO)2] (acac=acetylacetonate) and Rh(8-oxy)(CO)2(8-oxy=8-hydroxyquinolinate) yielding [Rh(chel)(CO)(PPhxpyl3–x)]. The properties of these complexes were examined by spectral (i.r.,u.v.-vis,31P n.m.r.) and chemical methods. 相似文献
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Koralewicz Maria Pruchnik Florian P. Szymaszek Anna Wajda-Hermanowicz Katarzyna Wrona-Grzegorek Katarzyna 《Transition Metal Chemistry》1998,23(4):523-525
The dimeric rhodium(II) complexes [Rh2(leu)4(H2O)2]- (ClO4)4 and [Rh2(pro)4(H2O)2](ClO4)4 have been prepared and characterized by elemental analyses, i.r., u.v.–vis. and 1H-n.m.r. spectroscopy. The amino acid molecules are coordinated as bridging ligands via their carboxylato groups. Cyclic voltammetry in DMF has shown that the complexes undergo a quasi-reversible reduction to yield dimers containing a Rh
2
3+
core. Oxidation processes within the 0–1.5V range were not observed. 相似文献
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Ewa Gaŀdecka Zdzisŀaw Gaŀdecki Katarzyna Wajda-Hermanowicz Florian P. Pruchnik 《Journal of chemical crystallography》1995,25(11):717-723
The structure of the title tetranuclear cluster, C59H42N3O8P3Ir4, was determined by X-ray analysis. It crystallizes in the monoclinic space groupC2/c. The unit cell parameters are:a =47.277(6),b=10.519(3),c=23.025(4) Å, =105.77(1)°. The iridium atoms form a nearly regular tetrahedron. Between Ir4 and N336 atoms exists a relatively strong bond, thus one of the phosphine ligands is bridging one coordinatingvia P and N atoms. 相似文献
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Summary
Trans-[RhCl(CO)(PR3)2] complexes [PR3=tris-(2-pyridyl)phosphine {P(2-pyl)3}, phenylbis(2-pyridyl)phosphine {PPh(2-pyl)2} or tris(3-pyridyl)phosphine {P(3-pyl)3}] have been synthesized and examined by spectroscopic methods (i.r., u.v.-vis,31P{1H} n.m.r.,1H n.m.r.). In solution the P(2-pyl)3 and PPh(2-pyl)2 complexes exhibit equilibrium between the pentacoordinate state, with one of the phosphine molecules coordinated via nitrogen and phosphorus, and complexes with the phosphine coordinated only through nitrogens. 相似文献
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The rhodium(III) complex mer,cis-[RhCl3(PPh2py-P,N)(PPh2py-P)] (1) (PPh2py = diphenyl (2-pyridyl)phosphine) has been prepared from RhCl3 x 3H2O and PPh2py and converted to the trans,cis-[RhCl2(PPh2py-P,N)2]PF6 (2) in acetone solution by treatment with Ag+ and PF6(-). Ruthenium(III) and ruthenium(II) compounds with PPh2py, mer,cis-[RuCl3(PPh2py-P,N)(PPh2py-P)] (3) and mer-[RuCl(PPh2py-P,N)2(PPh2py-P)]Cl (5) have been obtained from DMSO precursor complexes. In a chloroform solution, complex (5) isomerizes to fac-[RuCl(PPh2py-P,N)2(PPh2py-P)]Cl (fac-5). All compounds have been characterized by MS, UV-vis, IR, and 1H and 31P{1H} NMR spectroscopy, and the Ru(III) compound has been characterized by EPR spectroscopy as well. The crystal structures of 1, 2, 3, and fac-5 have been determined. In all compounds under investigation, at least one pyridylphosphine acts as a chelate ligand. The 31P chemical shifts for chelating PPh2py-P,N depend on the Ru-P bond lengths. 相似文献
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