Journal of Molecular Structure p. 9 - 18 (2000)
Update date:2022-08-03
Topics:
Daszkiewicz
Kyziol
Predo
Zaleski
Ten mono-, di- and tri-nitro derivatives of N-methyl-N-phenylnitramine were prepared and investigated using spectral and electrooptical methods. Three of them, viz. N-(2, 5-dinitrophenyl)-N-methylnitramine (monoclinic, P21/c, a = 8.248(2), b = 11.655(2), c = 10.404(2) ?, β = 102.57(2)°), N-(2,3-dinitrophenyl)-N-methylnitramine (monoclinic, P21/c, a = 9.224(2), b = 7.222(2), c = 15.458(4) ?, β = 101.08(2)°)) and N-(3,5-dinitrophenyl)-N-methylnitramine (monoclinic, P21/n, a = 9.814(2), b = 12.000(2), c = 8.865(2) ?, β = 114.94(2)°) were examined by the X-ray diffraction method. The nitramino group is nearly planar with the short N(7)-N(8) bond and strongly electron deficient N(8) atom. The nitramino group is twisted vs. the aromatic ring, there is no conjugation between the nitro and nitramino groups across the ring. The nitramino group is an electron withdrawing substituent due to the inductive effect. The number and positions of the At-nitro groups have no influence on the N-nitro group. Its migration ability cannot be explained in terms of the interaction between the migration origin and the ring substituents. (C) 2000 Elsevier Science B.V.
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