Cone angle of ligands – Group IV and V compounds was written by Imyanitov, N. S.. And the article was included in Koordinatsionnaya Khimiya in 1985.Category: nitriles-buliding-blocks This article mentions the following:
The cone angle (the steric characteristic, expressing the degree of filling out by the ligand of the coordination sphere) was calculated for 610 ligands. The ligands considered have the formulas AX3 or A(OX)3 and have tetrahedral geometry with respect to A in the fragment of the complex M-AX3 (M = coordinating metal; A = N, P, As, Sb, Bi, C, Si, Ge, Sn, Pb; X = alkyl, cycloalkyl, aryl, alkylaryl, arylalkyl). Known cone angles of ligands based on P, determined by mol. models, are correlated; the effective covalent and van der Waals radii of X were calculated with respect to the known cone angles. The cone angles are calculated with respect to the radii and the internuclear M-A distances. This procedure ensures standardization and comparability of the steric characteristics obtained. Cone angles are equal or nearly equal for neighboring elements of group IVA and VA. As the at. number of A in a group increases the cone angle decreases. The change in cone angle was considered in relation to the M-ligand; the cone angle values, established for Ni complexes, can be used for complexes of all other transition metals, except those in the beginning of the transition series. In the experiment, the researchers used many compounds, for example, 3,3′,3”-Nitrilotripropanenitrile (cas: 7528-78-1Category: nitriles-buliding-blocks).
3,3′,3”-Nitrilotripropanenitrile (cas: 7528-78-1) belongs to nitriles. The electronic structure of nitriles is very similar to that of an alkyne with the main difference being the presence of a set of lone pair electrons on the nitrogen. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Category: nitriles-buliding-blocks
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts