1 H,  13 C,  31 P NMR and conformational study of 7‐membered ring organophosphorus compounds. 1,3,2‐dioxaphosphepanes | Zendy

Guimaraes A. C. | Zendy; Robert J. B. | Zendy; Taieb C. | Zendy; Tabony J. | Zendy

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1 H, 13 C, 31 P NMR and conformational study of 7‐membered ring organophosphorus compounds. 1,3,2‐dioxaphosphepanes

Author(s) -

Guimaraes A. C.,

Robert J. B.,

Taieb C.,

Tabony J.

Publication year - 1978

Publication title -

organic magnetic resonance

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0030-4921

DOI - 10.1002/mrc.1270110810

Subject(s) - ring (chemistry) , crystallography , coupling constant , chemistry , molecule , lattice constant , stereochemistry , physics , organic chemistry , particle physics , diffraction , optics

The 1 H, 13 C and 31 P NMR data of several 2‐R‐2‐thiono‐1,3‐dioxa organophosphorus molecules with 7‐membered rings [R = Cl, OC 6 H 5 , C 6 H 5 , CH 3 , N(CH 3 ) 2 ] are reported. The conformation of the 7‐membered ring is discussed by reference to the 3 J (POCH) coupling constants which are compared with those observed in 6‐membered 1,3,2‐dioxaphosphorinanes. It is shown that caution must be exercised in using the 3 J (POCH) angular dependence as a stereochemical tool. The 31 P spin lattice relaxation times of some of these 7‐membered rings have been measured and the values are discussed.

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