In situ template generation for zincophosphate synthesis leading to guanylurea zinc phosphate, C_2H_7N_4O·ZnPO_4, containing template-to-template N-H…O hydrogen bonds

摘要

The synthesis and structure of C_2H_7N_4O·ZnPO_4 (guanylurea zinc phosphate) are reported. The cationic [C_2H_7N_4O]~+ template was prepared in situ by the slow hydrolysis of the neutral 2-cyanoguanidine starting material. The resulting structure contains an unusual, unprotonated, zincophosphate layer topology as well as N-H…O template-to-template hydrogen bonds which help to stabilize a "double sandwich" of templating cations between the inorganic sheets. Crystal data: C_2H_7N_4O·ZnPO_4, M_r = 263.48. monoclinic, P2_1/c, a = 13.6453(9), b = 5.0716(3), c = 10.6005(7) A, β = 95.918(2), Z = 4, V = 729.7(1)A~3, R(F) = 0.034 w R(F) = 0.034.