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Showing 1 to 6 of 6 for “"hexacoordinate"”.
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Stereoisomerization of Hexacoordinate Sulfur and Tellurium
The reaction of bromine trifluoride with sulfurane 1 gives rise to the first reported isolation of geometrical isomers of 12-S-6 sulfur, the trans- and cis-persulfuranes 2 and 3. The cis isomer is 2.0 (+OR-) 0.1 kcal/mol more favored in free energy than the all trans isomer in methylene chloride …
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Compounds of Pentacoordinate (10-Boron-5) and Hexacoordinate (12-Boron-6) Hypervalent Boron
Efficient synthetic routes to 2-substituted pyridines and 2,6-disubstituted pyridine 1-oxides are described, involving direct ortho lithiation with the sterically hindered base, lithium 2,2,6,6-tetramethylpiperidide, in the presence of electrophiles that are compatible with the base, e.g., …
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The Chemistry of Tetraoxypersulfuranes and Their Precursors
… (persulfurane I), the first example of a hexacoordinate organosulfur (VI) derivative lacking fluorine ligands, a sulfone bisketal, was synthesized by treatment of bis{2-(1-hydroxy-
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Contributions to the chemistry of higher-coordinate Silicon : synthesis, structure, and stereodynamics of new Silicon(IV) complexes with SiO2N2C, SiO4C, or SiO6 skeletons
… special emphasis on the chemistry of penta- and hexacoordinate silicon.The spirocyclic zwitterionic Lambda5Si-silicates 1–6 with a (2,2,6,6-tetramethylpiperidinio)- methyl group and two identical bidentate chelate ligands derived from glycine, (S)-alanine, (S)-phenylalanine, (S)-valine, …
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Studies of the effect of cysteine and heme pocket mutations of the nitric oxide dioxygenase and nitrite reductase activities of human Cytoglobin and Androglobin heme domain
… Androglobin (Adgb). These fresh additions are hexacoordinate, unlike Mb and Hb which have their sixth coordination site vacant in the absence of external ligands, Cygb and Adgb have their sixth coordination site occupied, by a histidine and glutamine respectively. Cygb is a low abundance …
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Reevaluating the photophysics and electronic structure of Cr(III) and V(II) complexes: the implications of distortion on the excited state manifold
… to V(II) and V(III). The differences between the hexacoordinate V(II) and heptacoordinate V(III) further our understanding of the apical nitrogen's role on the electronics of the complex. Additionally, we exploit the utility of the SHAPE program to quantify structural distortion and correlate to …