Results 251 to 260 of about 1,048,468 (267)

IDENTIFIABILITY OF PHYLOGENETIC LEVEL-2 NETWORKS UNDER THE JUKES-CANTOR MODEL

open access: yes
Englander AK   +6 more
europepmc   +1 more source

Planar and non-planar borepins

Molecular Physics, 1996
Theoretical studies of borepin and its B-substituted derivatives show planar structures with weak out-of-plane bending modes, often leading to boat-shaped borepins. The lowest vibrational frequency of borepin is 167 cm-1 at both HF/6-31G* and MP2/6-31G* levels, compared to 248 cm-1 calculated for the isoelectronic tropylium ion.
JEROME SCHULMAN, RAYMOND DISCH
openaire   +2 more sources

Planar and non-planar unsaturation—II

Tetrahedron, 1972
Abstract A π-electronic method, adapted to the study of non-planar unsaturated molecules, is used to examine the consequences of twisting about the exocyclic bond in derivatives of fulvene and fulvalene. The geometry, electronic spectrum, ionization and reduction potentials of fulvene, 6,6-disubstituted fulvenes, fulvalene, octachlorofulvalene ...
Amatzya Y. Meyer, H. Yinnon
openaire   +2 more sources

Home - About - Disclaimer - Privacy