Zobrazeno 1 - 10
of 481
pro vyhledávání: '"and J. Brunvoll"'
Autor:
J. Brunvoll, S. J. Cyvin
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:114-119
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:5-22
Spectroscopic calculations for 38 tetrahedral XY/sub 4/ molecules were performed, assuming small harmonic vibrations. The results of following quantities are reported: force constants, compliance constarts, mean-square amplitude matrices, parailel an
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:120-126
Relations between Coriolis coupling coefficients in tetrahedral XY4 molecules are evaluated, using the method of Cα and related matrices. It appears that the Coriolis coupling may be studied in terms of two independent Coriolis coefficients, e.g. ζ
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 72:706-718
The s-, σ, and ρ0-vectors are given for the tetrahedral XY4 molecular model. Vector methods have been used for constructing the (a) Coriolis Cα matrices, (b) matrix products G−1 Cα, and (c) the Cα matrices.
Publikováno v:
Chromatographia. 55:S35-S39
The influence of sample preparation on ion suppression is studied using the model compounds ropivacaine and 3OH-ropivacaine. Three sample preparation techniques are assessed: Solid Phase Extraction (SPE), Direct Dilution and Protein Precipitation. Al
Publikováno v:
Journal of Molecular Structure. 445:55-58
The following bond lengths ( r g ) and bond angles have been determined for perfluoroadamantane from gas-phase electron diffraction: CC 1.560 ± 0.003, C(F 2 )F 1.340 ± 0.005, C(F)F 1.363 ± 0.010 A , CC(F 2 )C 107.7 ± 0.9, CC(F)C 110.3 ±
Publikováno v:
Journal of Molecular Structure. 445:127-137
Staggered conformers of alkanes are represented by systems which can be embedded in the diamond lattice. Previous enumerations of alkane systems (acyclic) are supplemented. Original contributions are supplied to the numbers and symmetries of monocycl
Autor:
Zhang Fuji, Chen Rong-Si, S. J. Cyvina, Bjørg N. Cyvin, J. Brunvoll, S. El-Basil, Ivan Gutman
Publikováno v:
ResearcherID
A system of Class Qq is a polygonal system consisting of one central q-gon circumscribed by q other polygons, which may possess different sizes. As chemical graphs, these systems represent polycyclic conjugated hydrocarbons, which include homologous
Publikováno v:
Journal of Chemical Information and Computer Sciences. 37:460-466
An α-p-catapoly-q-gon is a catacondensed polygonal system with α p-gons and r − α q-gons, which represents a polycyclic conjugated hydrocarbon. Here r is the total number of polygons or rings. A complete mathematical solution for the numbers of
Publikováno v:
Journal of Mathematical Chemistry. 21:193-196
Tree‐like octagonal systems (O) are catacondensed systems of octagons, which represent a class of polycyclic conjugated hydrocarbons. Their numbers of isomers are determined and expressed in terms of generating functions.