Stereochemistry of nucleophilic substitution at the optically active trivalent phosphorus atom

1976 ◽  
pp. 1025-1026 ◽  
Author(s):  
Jan Omelanczuk ◽  
Marian Mikołajczyk
Keyword(s):  
Nucleophilic Substitution ◽  
Phosphorus Atom ◽  
Optically Active ◽  
Trivalent Phosphorus

Cyclic Esters of Phosphorous — Phosphoric Anhydride as a Tool for Studying the “Abnormal” Biphilic Reactivity of PIII—PV Anhydride System

1973 ◽  
Vol 28 (9-10) ◽  
pp. 620-624 ◽  
Author(s):  
J. Mikolajczyk ◽  
J. Michalski ◽  
A. Zwierzak
Keyword(s):  
Phosphorus Atom ◽  
Cyclic Ester ◽  
Trivalent Phosphorus ◽  
Cyclic Esters ◽  
Phosphoric Anhydride ◽  
Starting Point ◽  
Acetic Acids

A series of esters of phosphorous-phosphoric anhydride containing cyclic ester groups at one or both phosphorus atoms were prepared. The typical biphilic character of these compounds has been found. Unexpectedly observed lack of reactivity of anhydrides containing cyclic ester groups at trivalent phosphorus atom with respect to diethylphosphoric and acetic acids is the starting point for discussion on the mechanism of acidolysis. Unusual inertness of PIII cyclic esters of phosphorous-phosphoric anhydride towards protic acids is discussed in terms of Hudson’s concept of steric retardation on quaternisation.

Optically Active Transition Metal Compounds, 136 [1]. An Octahedral Molybdenum Complex (P-P’)Mo(CO)4 with a Chiral Secondary Phosphorus Atom

2004 ◽  
Vol 59 (8) ◽  
pp. 889-892
Author(s):  
Henri Brunner ◽  
Ilias Grau ◽  
Manfred Zabel
Keyword(s):  
Solid State ◽  
Phosphorus Atom ◽  
Optically Active ◽  
Molybdenum Complex ◽  
Chelate Ligand ◽  
Metal Compounds ◽  
X Ray ◽  
Diastereomer Mixture ◽  
Active Transition ◽  
Molybdenum Carbonyl

AbstractReaction of (η6-C6H5CH3)Mo(CO)3 with the easily accessible chiral chelate ligand P,P,Pʹ-tris- [(+)-9-phenyldeltacyclan-8-yl]-1,2-bis(phosphanyl)benzene P-P’ afforded the octahedral molybdenum carbonyl derivate (P-P’)Mo(CO)4 1 as a diastereomer mixture 1a (74%) and 1b (26%). Crystallization gave single crystals of (SP)-(P-P’)Mo(CO)4 1a. The X-ray structure analysis of compound 1a revealed the formation of an unusual triple-decker π-stack in the solid state.

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