Crystal engineering of urea alpha-network via I...O2N synthon and design of SHG active crystal N-4-iodophenyl-N'-4'-nitrophenylurea.
Crystalline nitrodiphenyl ureas adopt the N-H...O tape alpha-network only when stabilization accrues from the I...O(2)N or C[triple bond]C-H...O(2)N synthon, otherwise the ureanitro motif is preferred; soft, weak interactions can direct polar self-assembly in strong N-HO hydrogen-bonded crystals.
George
Sumod
S
School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India.
Nangia
Ashwini
A
Lam
Chi-Keung
CK
Mak
Thomas C W
TC
Nicoud
Jean-François
JF
D002616:Chemical Engineering / Q000379:methods*; D003460:Crystallization; D014508:Urea / Q000032:analysis / Q000138:chemical synthesis*
D014508:Urea