Rhodium complexes nitrosyltris

Nitrosyltris(triphenylphosphine)rhodium(I) was first prepared, in admixture with [Rh(NO)Cl2(PPh3)2], by allowing excess triphenylphosphine to react with [Rh(NO)2Cl] in tetrahyd-rofuran.1299 Since that time four other preparative methods, shown in Scheme 41, have been devised.199,201,202 1300-1303 Of these methods that using AT-methyl-AT-nitrosotoluene-p-sulfonamide is the most convenient.199 201 202 The dark crimson-red crystals of the complex start to decompose at 115 °C in air, but at 225 °C in a helium atmosphere.180... 

Tertiary phosphine analogs have been prepared from [Rh(NO)2Cl]x.1301 Nitrosyltris(phosphorus trifluoride)rhodium has been prepared from both rhodium(—I) and rhodium(I) complexes (equations 294-296).1297 Their physical properties are listed in Table 90. The triphenylphosphine complex is quite reactive (Scheme 42). Both electronic1312 and 31P NMR spectrometry show the equilibrium constant for the reaction (297) to be of the order of 10-4moldm3 in dichloromethane, benzene1312,1313 or THF,1313 so the reactivity of the complex cannot arise from the facile loss of a... 

Nitrosyltris(triphenylphosphine)rhodium forms bright crimson-red microcrystals. It softens at 96°, then melts with decomposition at 160° in air sealed under nitrogen it melts at 205-206°. The infrared spectrum shows a peak at 1610 cm.-1 (vs) attributed to v(NO). The complex is soluble in dichloromethane, chloroform, and benzene. 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ , ]

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