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

Abstract

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 groupPnmm(59) with the lattice parametersa=1.17423(3)nm,b=1.7124(4)nm,c=0.9933(4)nm,V=1.997 24nm3, whereas DMAN complexes with terephthalic acid or 5-aminoisophthalic acid crystallize in the monoclinic system in the space groupP2 orP2∕mwith the lattice parametersa=2.4337(5)nm,b=0.9665(2)nm,c=1.1800(3)nm,β=91.53(2)°,V=2.774 51nm3anda=2.1609(7)nm,b=1.1017(6)nm,c=1.8921(7)nm,β=112.095(34)°,V=4.173 46nm3, respectively.