X-ray powder diffraction study of DMAN complexes with phthalic acids

Complexes of 1,8-bis(dimethylamino)naphthalene, known also as DMAN, with phthalic acid, terephthalic acid, and 5-aminoisophthalic acid were synthesized and investigated by means of powder diffraction methods. DMAN and phthalic acid complexes crystallize in the orthorhombic system, space group P n m m (59) with the lattice parameters a =1.17423(3) nm , b =1.7124(4) nm , c =0.9933(4) nm , V =1.997 24 nm 3 , whereas DMAN complexes with terephthalic acid or 5-aminoisophthalic acid crystallize in the monoclinic system in the space group P 2 or P 2∕ m with the lattice parameters a =2.4337(5) nm , b =0.9665(2) nm , c =1.1800(3) nm , β =91.53(2)°, V =2.774 51 nm 3 and a =2.1609(7) nm , b =1.1017(6) nm , c =1.8921(7) nm , β =112.095(34)°, V =4.173 46 nm 3 , respectively.