Phosphite complexes, osmium

Phosphine complexes, osmium, 19 642 Phosphine coordination complexes, of uranium, 25 436 Phosphine derivatives, 19 28 Phosphine oxide(s), 11 495-496 19 66 predicted deviations from Raoult s law based on hydrogen-bonding interactions, 8 814t in salicylic acid manufacture, 22 8 Phosphine oxide diols/triols, 11 501 Phosphine selenides, 22 90 Phosphinic acid, 19 20, 54-55 Phosphinic anhydride, 11 499 Phosphinothricin acetyltransferase (PAT) proteins, 13 360 Phosphite esters, 19 20 Phosphites, in VDC polymer stabilization, 25 720... 

Phosphonate Arene Osmium(II) Complexes. Benzene osmium(II) phosphonates have been made via the initial reaction of phosphite-containing osmium cations of type 147 with Nal. Demethylation occurs, and the anionic complex 182 is obtained. Protonation with trifluoroacetic afforded adduct 183 which generated complex 184 on treatment with pyridine. The latter was shown to be a precursor of the thallium complex 185 containing the chelating osmium phosphonate 115). 

It is a singular circumstance that the known chemistry of the tertiary phosphite complexes of osmium differs quite significantly from that of the tertiary phosphines, arsines and stibines. The closest analogue to P(OR)3 in osmium coordination chemistry would seem to be PF3, but even here the similarities are not marked. The oxidation states found are 0, II, III and IV (there are no established zerovalent unsubstituted osmium phosphine complexes), and the phosphites form unsubstituted species of the type OsL and [OsL ] " which have no counterparts in phosphine chemistry. The reason for these differences must be associated in part at least with the different cone angles and basicities of P(OR)3 ligands as against PR3. Further similarities and differences between the chemistries of osmium phosphines, phosphites and phosphorus trihalide complexes would obviously constitute a worthwhile study. 

CsHuN, Ethanamine, A-ethyl-A-methyl-tungsten complex, 26 40, 42 C6HF5, Benzene, pentafluoro-gold complexes, 26 86-90 C H4I2, Benzene, 1,2-diido-iridium complex, 26 125 CJT, Phenyl platinum complex, 26 136 C,H,N, Pyridine osmium complex, 26 291 OHtS, Benzenethiol osmium complex, 26 304 QH7P, Phosphine, phenyl-cobalt-iron complex, 26 353 QH 1-Butyne, 3,3-dimethyl-mercury-molybdenum-ruthenium complex, 26 329-335 C6H 4P, Phosphine, triethyl-platinum complex, 26 126 platinum complexes, 26 135-140 CsHisPO, Triethyl phosphite iron complex, 26 61... 

In common with other platinum metals, an important area of ruthenium chemistry involves trialkyl- and triarylphosphines, and the corresponding phosphites. An extremely wide range of complexes is known, mainly of the II state, although compounds in the 0, III, and less commonly, IV state are known other ligands commonly associated with the PR3 group are halogens, alkyl and aryl groups, CO, NO, and alkenes as well as H and H2. Similar chemistry is found for osmium. 

Preparation and reactivity with azo-species of hydride and dihydrogen complexes of osmium stabilised by tris(pyrazolyl)borate and phosphite ligands... 

C5H15O3P, Triethyl phosphite, iron complex, 26 61, 28 171 nickel complexes, 28 101, 104-106 CjHijP, Phosphine, triethyl-, gold-osmium complexes, 27 209, 211 gold-platinum complex, 27 218 nickel complex, 28 101 platinum complexes, 26 126, 135-140, 27 32, 34,28 27, 120, 122, 133, 29 191 C5H16N4, l,2-Ethanediamine,AfJVJV Af -tetramethyl-, lithium complex, 26 148 CjH,6P2, Phosphine, l,2-ethanediylbis(di-methyl-, nickel complex, 28 101 CjHijSi, Silane, triethyl-, ruthenium complex, 26 269... 

Iron, Ruthenium, and Osmium.—Reactions of [(t7-arene)RuCl2]2 with AgBF followed by [2.2]paracyclophane have afforded salts of cationic sandwich complexes in which one (or both) of the arene rings of the cyclophane is(are) n-complexed with an [(j -arene)Ru] + residue. Kinetic studies have been reported of reversible nucleophilic additions of phosphines and phosphites to a benzene ligand of [( -PhH)2M] + (M=Fe, Ru, and Os) reactivity towards addition decreases through the series M = Fe>Ru>Os. ... 

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