SYNTHESIS, SPECTRAL CHARACTERIZATION AND SINGLE-CRYSTAL STRUCTURE OF A BICYCLIC TETRAPHOSPHAPENTAZANE TETRAOXIDE, N5P4ET5O4(OC6H3ME2-2,6)2

被引：7
|
作者：
MURUGAVEL, R [1 ]
KRISHNAMURTHY, SS [1 ]
NETHAJI, M [1 ]
机构：
[1] INDIAN INST SCI,DEPT INORGAN & PHYS CHEM,BANGALORE 560012,KARNATAKA,INDIA
来源：
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1993年 / 17期
关键词：
D O I：
10.1039/dt9930002569
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Reaction of the bicyclic phosphazane N5P4Et5Cl2 with 2,6-dimethylphenol and subsequent oxidation of the product by aqueous hydrogen peroxide yields N5P4Et5O4(OC6H3Me2-2,6)2 in 85% yield. Its structure has been established by NMR spectroscopy and single-crystal X-ray diffraction. The compound crystallises in the monoclinic space group C2/c with a = 21.245(5), b = 10.879(2), c = 16.450(6) angstrom, beta = 123.94(2)degrees, Z = 4, R = 0.066. The structural features are compared with those of bicyclic lambda5-phosphazenes of type N5P4R3(NR1R2)5(NHR3) (R1,R3 = Me or Et, R2 = H or Me). The observed conformation of the N3P3 rings in the present compound is mainly dictated by the maximisation of the stabilising influence of 'negative hyperconjugative interactions' between the nitrogen lone pairs and the adjacent P-X sigma* orbitals.
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页码：2569 / 2573
页数：5
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