Cycloalkylaminocyclo- and polyphosphazenes: X-ray crystal structures of gem-tetrakis(cyclohexylamino)dichlorocyclotriphosphazene octakis(cyclopropylamino)cyclotetraphosphazene

by Chandrasekhar, Vadapalli; Vivekanandan, K.; Nagendran, Selvarajan; Andavan, G. T. Senthil; Weathers, Norman Ray; Yarbrough, Jason C.; Cordes, A. Wallace

The reactions of chlorocyclophosphazenes N3P3Cl6 (1) and N4P4Cl8 (2) and polpdichlorophosphazene (3) with cyclohexylamine, cyclopentylamine, and cyclopropylamine have been studied. The major product with 1 is the geminal tetrakis derivative N3P3Cl2(NHR)(4), while 2 gives the completely substituted derivative, N4P4(NHR)(8). X-ray crystal structure determinations of N3P3Cl2(NHC6H11)(4) (1a) and N4P4(NHC3H5)(8) (2c) have been carried out, 1a crystallizes in a triclinic space group, P1, with a = 11.2330(13) Angstrom, b = 11.4269(16) Angstrom, c = 13.4055(12) Angstrom, alpha = 72.211(10)degrees, beta = 72.150(9)degrees, gamma = 81.777(11)degrees, V = 1557.3(3) Angstrom(3), and Z = 2. 2c crystallizes in a monclinic space group, P2(1)/n, with a = 12.433(3) Angstrom, b = 20.484(4) Angstrom, c = 12.645(3) Angstrom, beta = 92.81(2)degrees, V = 1557.3(3) Angstrom(3), and Z = 4. The cycloalkylamino-substituted polyphosphazenes contain a small amount of residual chlorine atoms. These have high glass transition temperatures.

Journal
Inorganic Chemistry
Volume
37
Issue
24
Year
1998
Start Page
6192
ISBN/ISSN
1520-510X; 0020-1669
DOI
10.1021/ic980520j