The most extensive compilation of organic crystal structures is Crystal Structures , Second Edition, Volume 5, The Structures of Aliphatic Compounds (1966) and Volume 6 Parts I (1969) and II (1971), Structures of Benzene Derivatives by R.W.G. Wyckoff, Wiley, New York....
1 (a) The structures of five organic compounds, A, B, C, D and E, are shown.Answer the questions that follow.Each letter may be used once, more than once or not at all.A BC H日 日一Q H H 日H HC H -C--c-C H - C - C - C -H一H C =C白白 白O -H百 白白H E日...
For the exhaustive and irredundant generation of candidate structures, two types of structure fragments, component and segment, are introduced in expert system for the elucidation of the structures of organic compounds system. A new scheme for the decomposition of the molecular formula into component ...
Crystal structures of organosilicon compounds. XXXII. 4,16-dimethyl-4,16-divinyl-2,2,6,6,10,10,14,14,18,18,21,21-dodecaphenyldispiro[7.3.7.3]decasiladodecaoxane, 2,2,4,4,6,6,12,12,14,14,16,16,21,21,23,23,25,25,30,30,32,32,34,34-tetraeicomethyltetraspiro[7.1.7.1.7.1....
碳原子数目相同——支链↑,b.p ↓ The order of boiling point: 1 2 3 4 (分子量) Density (密度): Physical Properties of Alkanes and Cycloalkanes As a class, the alkanes and cycloalkanes are the least density of all groups of organic compounds, 1. Solubility (溶解度): Alkanes and ...
Single crystal X-ray diffraction and Hirshfeld surface analyses of supramolecular assemblies in certain hydrogen bonded heterocyclic organic crystals. A set of four nitrogen containing heterocyclic organic compounds was synthesised in which enormous non-covalent interactions along with intensive hydrogen ... ...
The crystal structures of o-toluidinium chloride (1), o-toluidinium bromide (2) and two polymorphs of bicifadine hydrochloride (3) have been determined. The polymorphs of 3 differ in their molecular conformation and in their mode of packing. Crystallisation studies and quantum mechanical calcu...
Compounds 1 and 2 are the first examples of pyridine dicarboxylic acid N-oxide introduced into the alkaline earth metal–organic framework.关键词: Barium(II)-metal–organic frameworks Crystal structure DOI: 10.1007/s10904-010-9346-9 被引量: 40 ...
Conformational analysis of organic carbonyl compounds. Part 10. Ab-initio MO calculations of the conformational properties of 3-formyl-furan, -thio-phene, ... The relative stability of the conformers of 3-formyl-furan, -thiophene, and -pyrrole, and the changes in conformational composition in ...
The pursuit of atomic precision structure of porous covalent organic frameworks (COFs) is the key to understanding the relationship between structures and properties, and further developing new materials with superior performance. Yet, a challenge of how to determine their atomic structures has always ...