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RECAP is a molecule editor which generates fragments of structures by breaking bonds of defined types and the original link points in these are specified using isotopic labels. Searching databases of biologically active compounds for occurrences of fragments allows privileged structural motifs to be identified.
Molecular geometries can be specified in terms of 'bond lengths', 'bond angles' and 'torsional angles'. The bond length is defined to be the average distance between the nuclei of two atoms bonded together in any given molecule. A bond angle is the angle formed between three atoms across at least two bonds.
Arrow pushing or electron pushing is a technique used to describe the progression of organic chemistry reaction mechanisms. [1] It was first developed by Sir Robert Robinson.In using arrow pushing, "curved arrows" or "curly arrows" are drawn on the structural formulae of reactants in a chemical equation to show the reaction mechanism.
Bond ETFs can come in a variety of forms, including funds that aim to represent the total market as well as funds that slice and dice the bond market into specific parts – investment-grade or ...
Intermediate organization of covalent bonds: Regarding the organization of covalent bonds, recall that classic molecular solids, as stated above, consist of small, non-polar covalent molecules. The example given, paraffin wax , is a member of a family of hydrocarbon molecules of differing chain lengths, with high-density polyethylene at the ...
Relative bond energy and the ability to undergo favorable cyclic transition states affect the fragmentation process. Rules for the basic fragmentation processes are given by Stevenson's Rule. Homolysis Heterolysis. Two major categories of bond cleavage patterns are simple bond cleavage reactions and rearrangement reactions. [2]
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In 1983, Victory Games, a branch of Avalon Hill, published the James Bond 007 role-playing game based on Ian Fleming's spy novels and the popular movies. Q Manual, designed by Greg Gorden, with equipment illustrations by Stuart Leuthner and other artwork by James Talbot, was published the same year to provide further detail for the game.