Zobrazeno 1 - 10
of 51
pro vyhledávání: '"E.G. Claeys"'
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 80:253-258
The dipole moments of a series of tertiary arylphosphines were measured: R3P, R2PC6H5, RP(C6H5)2 (R = 4-FC6H4, 4-ClC6H4, 3-FC6H4, 3-ClC6H4), 2-ClC6H4P(C6H5)2, 3-FC6H4P(4-FC6H4)2 and 4-FC6H4P(3-FC6H4)2. The preparation of these phosphines, some of whi
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 78:219-227
Detailed and improved procedures for the preparation of (4-FC6H4)nPCl3-n and (3-FC6H4)nPCl3-n are presented. The identity and the purity of the substances were checked by I.R., n.m.r. (1H, 19F, and 31P) and mass spectrometry.
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 91:519-530
The mass spectra of the various methyl dimethylaminosilanes were studied and the fragmentation processes are discussed. Characteristic features of the mass spectra of these compounds are: (i) the breaking of the Si-N bond occurs more readily than tha
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 92:753-765
The mass spectra of the series (CH3)4-nSi(SCH3)n (n=1-4) and of (CH3)2Si(-SCH2-)2 were studied and the fragmentation processes under electron impact are discussed. The main features of the mass spectra are: (i) the high abundance of the molecular ion
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 70:462-467
Dans l'intention de verifier la generalite de l'equation de Higasi pour la determination rapide du moment dipolaire de molecules en solution, une serie de composes organometalliques et aliphatiques, dissous dans differents solvants apolaires, a ete e
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 91:507-518
The mass spectra of (Me)4-n Si(Allyl)n (n = 1-4) are discussed in detail. In these compounds odd-electron ions play a somewhat more important role in the decay processes than in the mass spectra of other organosilicon compounds where the even-electro
Publikováno v:
Journal of Molecular Structure. 40:89-95
The dipole moments of the following series of tertiary substituted aryl-group VB compounds were measured: ( a ) (C 6 H 5 ) 3 M and (XC 6 H 4 ) 3 M with M = P, As, Sb, Bi and X = 4-F, 4-Cl, 4-CH 3 , 3-F, 3-Cl; and ( b ) (3-XC 6 H 4 ) 3− n PR n with
NMR study of donor-acceptor complexes—IV. 11B NMR of arylphosphine and -arsine boronhalide complexes
Publikováno v:
Spectrochimica Acta Part A: Molecular Spectroscopy. 32:1149-1154
11B NMR spectra of adducts between the boronhalides and phenylphosphines, -arsines and phenylphosphinehalides have been studied. It is shown that both the 11B chemical shift increment and the coupling constants JP-B are sensitive to the strength of t
Publikováno v:
Journal of Molecular Structure. 99:207-216
A novel assignment of the η(CoC) and δ(CoCO) modes of the compounds ClHgCo(CO) 4 , Hg{Co(CO) 4 } 2 , Co 2 (CO) 8 and their axially substituted derivatives is presented. This assignment is based on a comparison of the frequency shifts due to substit
Publikováno v:
Journal of Organometallic Chemistry. 64:265-270
Refined values of the CO stretching force constants for monosubstituted metal pentacarbonyl complexes have been obtained by rigorous direct methods of calculation. The following compounds have been treated by this method: manganese carbonyl complexes