Crystal structures of N-(salicylidene)-tris(hydroxymethyl)methylamine and N-(5-chlorosalicylidene)-tris(hydroxymethyl)methylamine

The crystal structures of N-(salicylidene)-tris(hydroxymethyl)mehtylamine ( T) and N-(5-chlorosalicylidene)-tris(hydroxymethyl)methylamine (II) have be en determined. Crystals I are monoclinic, a = 10.518(2) Angstrom, b = 8.691 (2) Angstrom, c = 12.513(2) Angstrom, beta = 101.54(2)degrees space group P 21, Z = 4, and R = 0.046. Crystals II are triclinic, a = 7.196(1) Angstrom, b = 10.248(2) Angstrom, c = 16.835(3) Angstrom, alpha = 100.57(3)degrees, beta = 90.42(3)degrees, gamma = 94.68(3)degrees, space group P (1) over bar , Z = 4, and R = 0.072. The asymmetric cells in both crystals contain two i ndependent molecules. In structure I, the molecules occur in two tautomeric forms: benzenoid and quinoid. In structure II, both molecules are in the q uinoid form. (C) 2000 MAIK "Nauka/Interperiodica".