J.H.S. Green

Vibrational spectra of monosubstituted pyridines

Abstract The infra-red (4000–400 cm−1) and Raman spectra of 2-, 3- and 4-chloro and bromopyridines have been measured. Complete assignments of the frequencies are proposed for these and the corresponding methyl pyridines, and for the Raman displacements of 2- and 3-fluoropyridine. The assignments are correlated with one another and with those for the deutero compounds.

Vibrational spectra of ligands and complexes—II Infra-red spectra (3650–375 cm−1 of triphenyl-phosphine, triphenylphosphine oxide, and their complexes

Abstract The infra-red spectra (3650–375 cm−1 of triphenylphosphine, triphenylphosphine oxide and of thirteen complexes of the former ligand and five complexes of the latter ligand are reported, together with the Raman spectrum of the first compound. Vibrational assignments of the spectra are proposed, and characteristic frequency shifts of triphenylphosphine on coordination are discussed.

Vibrational spectra of benzene derivatives—VI: p-Disubstituted compounds

Abstract Utilising the results of new measurements of the infrared spectra (3650-50 cm −1 ) together with the Raman shifts, wavenumbers for all the fundamental frequencies, and complete interpretations of the observed spectra are presented for the fifteen compounds p -XC 6 H 4 Y; X, Y = CH 3 , F, Cl, Br or I.

Vibrational spectra of benzene derivatives—X: Monosubstituted nitrobenzenes

The infrared (3650–50 cm−1) and Raman spectra for the fifteen compounds, o-, m- or p-XC6H4NO2; X = CH3, F, Cl, Br, or I are presented and interpreted in detail, and the vibrations associated with the NO2 group are identified.

Vibrational spectra of benzene derivatives—IV. Methylphenyl sulphide, diphenyl sulphide, diphenyl disulphide and diphenyl sulphoxide

Abstract There are reported additional infra-red data for methylphenyl sulphide, together with new infra-red and Raman data for diphenyl sulphide and diphenyl disulphide, and new infra-red data for diphenyl sulphoxide and the complex [(C6H5)2SO]2CdI2. Vibrational assignments for these compounds are presented, and that for diphenyl ether is also discussed.

Vibrational spectra of benzene derivatives—XIV: Mono substituted phenols

Abstract Values of all the fundamental frequencies are proposed for the fifteen substituted phenols, o -, m - or p -X C 6 H 4 OH (X = CH 3 , F, Cl, Br or I), in the monomeric state utilizing i.r. (3650–50 cm −1 ) and Raman spectra. The in-plane and out-of-plane COH vibrations are identified for all the molecules; the former is also identified for o -methoxyphenol.

Vibrational spectra of benzene derivatives—VIII: m-Disubstituted compounds

Abstract Complete assignments, and full interpretations, of the infrared (3650-50 cm −1 ) and Raman spectra, are proposed for the fifteen compounds m -XC 6 H 4 Y; X, Y = CH 3 , F, Cl, Br or I.

Vibrational spectra of benzene derivatives—XVI. Benzaldehyde and mono-substituted benzaldehydes

Abstract By the interpretation of new measurements of the i.r. (3650-80 cm −1 ) and Raman spectra, complete vibrational assignments are proposed for benzaldehyde and for the twelve derivatives o -, m -or p - X C 6 H 4 CHO; X = F, CH 3 , Cl or Br. Evidence is presented for the co-existence in the liquid state of two rotational isomers for all four m -substituted compounds and for three of the o -substituted compounds.

Vibrational spectra of ligands and complexes—V. Infrared spectra (380-40 cm−1) of triphenylphosphine complexes of zinc, cadmium and mercury

Abstract The infrared spectra (380-40 cm−1) of the triphenylphosphine (L) complexes L2MX2 and (LHgX2)2, M = Zn, Cd, or Hg; X = Cl, Br, or I, have been recorded. Assignments are proposed for the M—X stretching, XMX bending, and M—P stretching frequencies of the L2MX2 complexes, and the terminal Hg—X stretching frequencies of the (LHgX2)2 complexes. The M—P stretching frequencies are at ∼160 cm−1 (M = Zn); ∼135 cm−1 (M = Cd); and ∼130 and 105 cm−1 (M = Hg), but they could not be identified for the (LHgX2)2 complexes.

Vibrational spectra of benzene derivatives—IX: o-Disubstituted compounds

Abstract Complete assignments and full interpretations of the infrared (3650–50 cm−1) and Raman spectra are proposed for the fifteen compounds o-XC6H4Y; X, Y = CH3, F, Cl. Br or I.