Original scientific paper

Crystal Structure of the Phosphinyl-stabilised Ylide Me₃NNP(=O)Ph₂ ⋅ H₂O

Kenneth W. Muir ; Chemistry Department, Glasgow University, Glasgow G12 8QQ, Great Britain
David G. Morris ; Chemistry Department, Glasgow University, Glasgow G12 8QQ, Great Britain
Vickie Innes ; Chemistry Department, Glasgow University, Glasgow G12 8QQ, Great Britain

Abstract

Crystals of trimethylammonio-P,P-diphenylphosphinamidate hydrate, Me3NNP(=O)Ph2 ⋅ H2O, are held together by hydrogen bonds which link two Me3NNP(=O)Ph2 and two water molecules to form a centrosymmetric O4H4 ring belonging to graph set R2 4(8). Each P=O oxygen atom can thereby act as acceptor to two hydrogen bonds, rather than to only one, as in the two-fold symmetric P=O⋅⋅⋅H–O–H⋅⋅⋅O=P motif commonly found in phosphine oxide hemihydrates. The unusual P–N bond in Me3NNP(=O)Ph2 is short enough 1.614(3) Å to indicate some multiple character.

Keywords

X-ray structure; ylide; hydrogen bonding

Hrčak ID:

132230

URI

https://hrcak.srce.hr/132230

Publication date:

1.9.1999.

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