Crystal Structure of N,N'-Diphenyl-guanidinium m-Chlorobenzeneseleninate

Abstract

The synthesis, and crystal and molecular structure of N,N′- diphenylguanidinium m- chlorobenzeneseleninate (C₁₉H₁₈CIN₃O₂Se), Mr 434.78, are reported. The crystal lattice of the compound belongs to the monoclinic space group P2₁/c with a 7.277(1), b 12.793(2), c 20.013(4) Ǻ, β 94.733(12)°, V 1859.8 Ǻ³, Z 4, D_obs 1.53 (by flotation), D_calc 1.555 g cm^-3, λ(Mo Kα ) 0.71069 Ǻ, μ 21.0 cm^-1, F(000) 880, T 293 K, R 0.057 and Rw 0.059 for 1745 unique observed reflections with I>2.0σ(I). The crystal packing consists of parallel layers of anions intercalated with cations interacting through electrostatic contacts. Vibrational spectra have been also recorded, and are discussed.