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    2-(2,6-di-tert-butyl-4-methylphenoxy)-2,4,4,6,6,8,8-heptachlorocyclo-2 lambda(5),4 lambda(5),6 lambda(5),8 lambda(5)-tetraphosphazatetraene
    (Munksgaard Int Publ Ltd, 1996) Hokelek, T; Kilic, A; Begec, S; Kilic, Z; Yildiz, M
    The title compound, C15H23Cl7N4OP4, consists Of a saddle-shaped cyclic tetrameric phosphazene ring and a bulky 2,6-di-tert-butyl-4-methylphenoxy side group. The bulky group substituent is instrumental in determining the molecular shape. The exo- and endocyclic angles about the P atoms both decrease on substitution whereas the P-N-P angles increase.
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    Unusual products in the reactions of hexachlorocyclotriphosphazatriene with sodium aryloxides
    (Wiley, 1996) Kilic, A; Begec, S; Cetinkaya, B; Hokelek, T; Kilic, Z; Gunduz, N; Yildiz, M
    Reactions of hexachlorocyclotriphosphazatriene, N3P3Cl6 1, with sodium aryloxides have been studied. Compound 1 was found to react by the nucleophilic substitution path way to yield monocyclophosphazenes [N3P3Cl5(OC(6)H(2)Bu(3)(t)-2, 4, 6) 5 and N3P3Cl4(OC(6)H(2)Me-4-Bu(2)(t)-2, 6)(2) 6] and bi(cyclophosphazenes) ([Cl5N3P3-P3N3Cl4(OC(6)H(3)Bu(2)(t)-2, 6)] 7 and [N3P3(OC(6)H(3)Bu(2)(t)-2, 6)(5)](2) 8]. The unusual bi(cyclophosphazenes) 7 and 8 are the first examples of two cyclotriphosphazene rings linked by a P-P bond [2.193 (2) Angstrom], which have been obtained by reacting 1 with ArONa. The structures of compounds 5-8 ave ascertained by elemental analyses, H-1-, P-31-C-13-NMR, IR, and MS spectra. The molecular structure of monocyclic-phosphazene 5 was determined by X-ray diffraction techniques for further structural assignment. It crystallizes in the monoclinic space group P2(1)/m with a = 6.144(2), b = 17.079(9), c = 13.181(9) Angstrom, beta = 92.79(7), and Z = 2, R = 0.074. Compound 5 is on a crystallographic mirror plane, and there is only a half molecule in the asymmetric unit. (C) 1996 John Wiley & Sons, Inc.