Microwave Spectrum and Molecular Structure of Nitrosobenzene

Abstract

The microwave spectrum of nitrosobenzene has been studied in the frequency region between 13 000 and 24 000 Mc/sec. Numerous a-type, R-branch transitions have been identified, and the rotational constants have been determined. The molecule is completely planar with the C–N=O group bent at an angle of about 116° in the plane of the ring.

Comparative Study of the Physicochemical Properties of Ortho-Substituted Aromatic Nitroso Compounds

“…The structural data estimated for the nitrosobenzenesulfonate compounds are summarized in Table . All four molecules were found to be planar, in good agreement with the results of an experimental study on nitrosobenzene carried out by Hanyu and Boggs . The presence of an electron-withdrawing substituent at the ortho position in the aromatic ring leads to a weakening of the C–N bond relative to the unsubstituted parent compound, NBS.…”

Interaction between Dioxoruthenium(VI) Porphyrins and Hydroxylamines: Coordination ofN-Substituted Hydroxylamine to Ruthenium and X-ray Crystal Structures of Ruthenium Complexes with a Unidentate Nitrosoarene Ligand

“…[45] The larger difference between the RuÀN1 (or RuÀN2) and RuÀN3 (or RuÀN4) bond lengths in 4 d than in 3 a and 3 e shows that the ruthenium atom in 4 d is more greatly displaced from the center of the equatorial RuN 4 plane. Strikingly, although the RuÀN(O)Ph bonding in 4 d may benefit from a push-pull effect in view of the p-acid character of PhNO and the Lewis base character of PhNH 2 , this mono(nitrosoarene) complex has a rather long RuÀN(PhNO) bond (2.042(2) ), which is even longer than the corresponding bonds in the bis(nitrosoarene) complexes 3 a and 3 e, and a short NÀO bond (1.159 (3) ), which is even shorter than that reported for free PhNO (1.17 ± 1.24 ); [46] this is very different from the observations on a mono(nitrosoalkane) analogue of 4 d, that is, [Fe II (TPP)(iPrNO)(iPrNH 2 )] (9), [19] which features a fairly short FeÀN(iPrNO) bond (1.86 ) with the NÀO bond appreciably longer than that assumed for a free nitrosoalkane. Apparently, despite the strong p-acid character of the PhNO ligand, there is no considerable trans influence in the bis(nitrosoarene) complexes 3, in contrast to the case of the osmium complex 2, which bears mixed axial ligands CO/ PhNO.…”

Structural studies on nitrosobenzene and 2-nitrosobenzoic acid. Crystal and molecular structures of cis-azobenzene dioxide and trans-2,2'-dicarboxyazobenzene dioxide

“…The N-0 lengths in the two crystallographically independent molecules of A,A-dimethyl-3iodo-4-nitrosoaniline24 are 1.23 (2) and 1.24 (2) A, while in the two independent molecules of an aliphatic nitrosocamphane derivative53 they are 1.16 (5) and I. 21 fit) of the variation in the differences in bond lengths and bond angles for several aromatic carboxylic acids; (1) 4-methylbenzoic acid [M. G. Takwale and L. M. Pant, Acta Crystallogr., Sect. B, 27, 1152Sect.…”