摘要:

In the coordination sphere of transition metals, ligand-free P1, P2, cyclo-P3, P4, cyclo-P5and cyclo-P6, can be stabilized in polynuclear clusters, as phosphorus-containing metallatetrahedranes, as compounds with PAchains, and as triple-decker complexes with cyclo-P3, cyclo-P5, and cyclo-P6, sandwiched between metal-complex fragments.

ISSN:0260-3594    

DOI:10.1080/02603598708081850

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Fenske-Hall molecular orbital calculations are used to probe the electronic structure and bonding of amide and alkoxide ligands bound to a transition metal. A “frozen π-orbital” method is introduced and used to separate σ and π-bonding effects of these ligands to the metal. Mulliken population analyses are used as a relative measure of π-donor ability of the alkoxide ligand with varying M-O distance, M-O-C(H) angle, and dnelectron count. Population analyses are also used to gauge the effect of π-donor ligands on the π-acceptor role of ancillary ligands such as carbonyl and isocyanide.

ISSN:0260-3594    

DOI:10.1080/02603598708081851

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Modern instrumentation allows the easy accumulation of high-quality bilinear data matrices. The new algorithm of Evolving Factor Analysis makes full use of all information contained directly in the data. Essentially perfect deconvolution, yielding the concentrations and absorption spectra of all species, becomes possible on a completely model-free basis.

ISSN:0260-3594    

DOI:10.1080/02603598708081852

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor