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

摘要

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 Pnmm (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 P2 or P2/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=2.77451 nm~3 and a = 2.1609(7) nm, b= 1.1017(6) nm, c= 1.8921(7) nm, β = 112.095(34)°, V = 4.17346 nm~3, respectively.