Carbonyl complexes physical properties

Molybdenum, tris(phenylenedithio)-structure, 1,63 Molybdenum alkoxides physical properties, 2,346 synthesis, 2,339 Molybdenum blue liquid-liquid extraction, 1,548 Molybdenum cofactor, 6,657 Molybdenum complexes acrylonitrile, 2,263 alkoxides, 3,1307 alkoxy carbonyl reactions, 2,355 alkyl, 3,1307 alkyl alkoxy reactions, 2,358 alkyl peroxides oxidation catalyses, 6,342 allyl, 3,1306... 

Physical properties depend upon the same types of steric effects as chemical reactivities. In both types of data the measurable phenomenon is occurring at a clearly defined active site. Thus, for the ionization of a set of phenols the active site is the OH group, while for the stretching frequency in the infrared spectrum of the acetyl group in a set of acetophenones the active site is the carbonyl group. In the case of bioactivities, steric effects in the formation of the bioactive substance-receptor site complex are frequently of great importance. In this case the entire bioactive... 

A number of MO calculations have been performed on carbonyl complexes, with methods ranging from ab initio to DVM-HFS. In any case it was found that both a donation and jr back-donation interactions are important in determining the geometrical structure and physical properties of these complexes. The ab initio calculations of Sakaki et al.110 have shown that the strengthening of jt back-donation is the driving force which stabilizes the pseudotetrahedral geometry vs. the square planar one in [Ni(PR3)2(CO)2] complexes. 

Tungsten, hexahydridotris(diisopropyiphenylphosphine)-structure, 700 Tungsten alkoxides physical properties, 346 synthesis, 339 Tungsten complexes alkoxy carbonyl reactions, 355 alkyl alkoxy reactions, 358 amides... 

Nearby elements also display chemistry reflecting alkyne 7rx donation to a vacant metal dir orbital. In Group V, Lippard s coupled carbonyl product Ta(Me3SiOC=COSiMe3)(dmpe)2Cl is a d4 Ta(I) alkyne monomer (116), similar in electron count to CpV(CO)2(RC=CR) complexes (231). The preparative route and physical properties of a series of Ta(CO)2-(RC=CR)(I)L2 d4 monomers are compatible with a four-electron donor description for the alkyne ligands (231a). The d2 configuration has also... 

Diphenylcyclopropenonc formed 1 1 stable crystalline complexes 2 with carboxylic acids. The physical properties of these complexes were consistent with a hydrogen-bonded complexation between the carbonyl oxygen of the cyclopropenone and the acidic hydrogen of the carboxylic acid. - ... 

Binuclear carbonyl complexes with M—M bond analogous to Mn2(CO)io have been prepared for technetium and rhenium. The rhenium analogue has been synthesized by the carbon monoxide reduction of Rc207 or KRe04 (eq (5)) [3] or by reduction of anhydrous Re(III) or Re(V) chloride by sodium under CO pressure (eq (6)). [15]. The physical and structural properties of Tc2(CO),o and Re2(CO)io are listed in Table 9.1. 

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