Assignment of 31P Chemical Shifts to Isomers of 2,3-Dialkoxy-λ3-diazadiphosphetidines — Crystal and Molecular Structure of trans-[PhNP(OCH2CF3)]2-Reference-Cited by-同舟云学术

Assignment of 31P Chemical Shifts to Isomers of 2,3-Dialkoxy-λ3-diazadiphosphetidines — Crystal and Molecular Structure of trans-[PhNP(OCH2CF3)]2

Published:1986-09-01 Issue:9 Volume:41 Page:1067-1070
ISSN:1865-7117
Container-title:Zeitschrift für Naturforschung B
language:en
Short-container-title:

Author:

Kumaravel S. S.¹,Krishnamurthy S. S.²

Affiliation:

1. Department of Inorganic and Physical Chemistry. Indian Institute of Science, Bangalore 560012, India

2. Departm ent of Inorganic and Physical Chemistry. Indian Institute of Science, Bangalore 560012, India

Abstract

Abstract Geometrical isomers of λ3-diazadiphosphetidines show large differences in their 31P chemical shifts. Trifluoroethoxylation of cis-(PhNPCl)2 gives only the 'low-field' isomer initially, for which the crystal structure is determined. The compound crystallises in the triclinic space group P1̄ with a = 9 .6 2 4 (4 ).6 = 10.107(4),c = 11.140(7) Å ; a = 105.65(4),β = 110.59(4),y = 93.82(3)°;and Z = 2. The structure was solved by direct methods and refined to R = 0.045. The alkoxy groups are trans to each other. On standing in solution. trans -[PhNP(OCH2CF3)]2 transforms slowly and almost completely into its cis analogue with a high field 31P chemical shift

Publisher

Walter de Gruyter GmbH

Subject

General Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/znb-1986-0902/pdf

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