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1 ally more stable POC-isomer of the cage-like phosphorane.
2 th nucleophilic attack to generate a similar phosphorane.
3 ding hydroperoxy arylphosphine and a hydroxy phosphorane.
4 .3(2) with (tert-butylimino)tris(pyrrolidino)phosphorane (12), and the rate constant for H(+) transfe
5 from phenylthioacetal 24 and condensed with phosphorane 30, representing subunit B, in a Wittig reac
6 mally and hydrolytically stable arsanylidine-phosphorane 4 with a sterically accessible two-coordinat
13 a-PGM, and Mg(2+)-beta-glucose-6-phosphate-1-phosphorane-beta-PGM complexes to identify conformationa
17 structure reveals a stabilized pentacovalent phosphorane formed in the phosphoryl transfer from the C
19 also support the formation of a meta-stable phosphorane intermediate along the reaction, which resem
21 we find a stable pentacoordinated dianionic phosphorane intermediate in the reaction path supporting
22 e scissile phosphate occurs to stabilize the phosphorane intermediate in the sequential mechanism.
23 er 13.22 kcal/mol) the PO bond on the cyclic phosphorane intermediate is nearly broken (BO 0.28) and
24 rsistence of the short-lived five-coordinate phosphorane intermediate on the minutes times scale is r
25 iate along the reaction, which resembles the phosphorane intermediate structure obtained only in the
26 associative with a metastable pentacovalent phosphorane intermediate, and the pyrophosphate leaving
27 observed to be sequential, passing through a phosphorane intermediate, with free energy barriers of 2
31 e oxides are shown to react via conventional phosphorane intermediates, but phosphine sulfides follow
33 mechanism is observed to be concerted with a phosphorane-like transition state and a free energy barr
34 alate and perfluorophosphorylated conjugated phosphoranes, obtained by reaction of phosphazenes and f
37 2a with ethoxycarbonyl- or dibromomethylene phosphorane reagents gave the conjugated dienes 6a and 4
38 hosphates, acyclic and cyclic phosphates and phosphoranes relevant to RNA catalysis are presented.
39 lative strengths of axial and equatorial P-O phosphorane single bonds and P-O single and double bonds
40 ecular dynamics simulations using an anionic phosphorane transition state mimic suggest that H-bondin
41 for an essentially undisturbed pentacovalent phosphorane transition state, and explaining the bypass
43 ation of regio- and stereoisomeric cage-like phosphoranes with phosphorus-carbon and phosphorus-oxyge
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