Chromium complexes nitrosyls

NO, Nitrosyls, molybdenum and tungsten, 26 132, 133 NOC, Cyanate tungsten complex, 26 42 NOC4H7, 3-Butenamide nickel complex, 26 206 NOC4H , 2-Propenamide, 2-methyl-nickel complex, 26 205 NOC H, Benzoyl isocyanide chromium complex, 26 32, 34, 35 N04ReC16H, Perrhenate, tetrabutylam-monium, 26 391... 

Steric interactions also influence the ground-state stability and barrier heights of the (R,R)-(S,S) and (R,S)-(S,R) diastereomers found in (rf-C5H5)Fe(CO)[Sn(CH3)3](CH3CH==CH2) (56). The olefin in one pair of diastereomers is significantly more labile. Diastereomers can also be detected by both IR and NMR in (Tj -CsHsIMfCOKNOKolefin) where M = Cr, Mo, and W (57, 60, 66). Approximately equal amounts of the diastereomers of the chromium complexes may be prepared readily by irradiation of the nitrosyl dicarbonyl complex in the presence of an olefin, such as propene or styrene (66). 

The nitrosyl carbonyls CpM(NO)(CO)2 [M=Cr (21, 7S), Mo (57), W (19)) can be made by the action of nitric oxide on [CpCr(CO)3]2, [CpMo(CO)3] , or [CpW(CO)3] , respectively. The chromium complex undergoes a Friedel-Crafts acetylation to give (CsH4COCH3)Cr(NO)(CO)2 (21). A series of molybdenum complexes CpMo(NO)l2L [L = PPh3, P(OPh)3, py, and bipy] has been made from L and [CpMo(NO)l2]2 (57). The cationic manganese species [CpMn(NO)(CO)2], obtained by the action of nitrite and acid on CpMn(CO)3, can be precipitated as the yellow hexafluorophosphate salt (51). With sodium borohydride this affords [CpMn(NO)(CO)]2 which probably contains bridging NO groups (see below) (58). The complex [CpMn(NO)S2] is probably similar in structure... 

A series of chromium(II) nitrosyl complexes, [Cr(NO)(S2CNR2)2L] (L = H2O, thiourea), have been prepared, the thiourea resulting from dithiocar-bamate degradation (756). They are characterized by ESR spectroscopy, which suggests that the thiourea hes trans to the nitrosyl. 

J. R. Dethlefsen, A. Dossing, and E. D. Hedegard, Electron paramagnetic resonance studies of nitrosyl and thionitrosyl and density functional theory studies of nitride, nitrosyl, thionitrosyl, and selenoni-trosyl complexes of chromium, Inorg. Chem., 49 (2010) 8769-8778. 

Chromatography cyclophosphazenes, 21 46, 59 technetium, 11 48-49 Chromites, as spinel structures, 2 30 Chromium, see Tetranuclear d-block metal complexes, chromium acetylene complexes of, 4 104 alkoxides, 26 276-283 bimetallics, 26 328 dimeric cyclopentdienyl, 26 282-283 divalent complexes, 26 282 nitrosyls, 26 280-281 trivalent complexes, 26 276-280 adamantoxides, 26 320 di(/ >rt-butyl)methoxides, 26 321-325 electronic spectra, 26 277-279 isocyanate insertion, 26 280 substitution reactions, 26 278-279 [9]aneS, complexes, 35 11 atom... 

CYCLOPENTADIENYL)NITROSYL chromium, MOLYBDENUM, AND TUNGSTEN COMPLEXES... 

Several chromium nitrosyls, and complexes of quinones which are members of redox series, can be considered to contain chromium(O) or chromium(I) (see Sections 35.4.2.6 and 35.4.4.8). 

Nitrosyls are discussed in Section 35.4.2.6, and hydrazine is the only ligand of its type from which chromium(II) complexes have been prepared. 

Nitrosyl-aryl porphyrin complexes, with iron, 6, 107 Nitrosyl complexes with chromium, 5, 301 with manganese, 5, 773... 

Polyselenido nitrosyl complexes, with chromium, 5, 303 Polysilane high polymers... 

Polysulfanides, in Ru and Os half-sandwich complexes, 5-Gp and 7 5-indenyl compounds, 6, 496 Polysulfide rings, with germanium, 3, 742-743 Polysulfides, in Ru and Os half-sandwich complexes, rjS-Cp and ]5-indenyl compounds, 6, 496 Polysulfido nitrosyl complexes, with chromium, 5, 303 Polytetrafluoroethylene valves, in high vacuum lines, 1, 198 Polythiaether macrocyclic ligands, in hexaruthenium carbido clusters, 6, 1018-1019... 

Some cyclopentadienyl-/x-mercapto-, -alkoxo-, and /a-dialkylamido-chromium nitrosyl complexes (VI)-(X) have been studied by Preston and Reed 167). 

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