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Structural Diversity of Lithium, Sodium, and Potassium Complexes of N ‐Mesityl‐ P,P ‐diphenylphosphoryl Amide
Author(s) -
AlShabatat Maha,
Schüler Philipp,
Krieck Sven,
Görls Helmar,
Westerhausen Matthias
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800261
Subject(s) - chemistry , metalation , lithium (medication) , amide , potassium , sodium , alkali metal , lithium amide , medicinal chemistry , dimer , stereochemistry , sodium hydride , ring (chemistry) , crystal structure , crystallography , organic chemistry , catalysis , medicine , enantioselective synthesis , endocrinology
Metalation of N ‐mesityl‐ P , P ‐diphenylphosphinic amide Ph 2 P(=O)–N(H)Mes ( 1 ) with n ‐butyllithium, sodium amide and potassium hydride yields the corresponding alkali metal N ‐mesityl‐ P , P ‐diphenylphosphoryl amides of lithium ( 2 ), sodium ( 3 ), and potassium ( 4 ). The lithium complex 2 forms a dimer with an eight‐membered (Li–O–P–N) 2 ring. The sodium derivative 3 crystallizes as a dinuclear centrosymmetric complex with a central Na 2 O 2 ring. The potassium congener 4 precipitates as a tetranuclear compound with an inner K 4 O 4 heterocubane cage. In these complexes the phosphoryl amido ligands act as bidentate Lewis bases and form strained four‐membered M –O–P–N rings. Due to this fact, the endocyclic M –O bonds of the M 2 O 2 rings vary within a large range.