title: Diethyl 3-amino-4-[(triphenyl-phosphor-anyl-idene)amino]thieno[2,3-b]thio-phene-2,5-dicarboxyl-ate.
abstract: The asymmetric unit of the title compound, C(30)H(27)N(2)O(4)PS(2), consists of two crystallographically independent mol-ecules. The thieno[2,3-b]thio-phene ring systems are planar. One of the terminal ethyl groups is disordered over two positions; the site occupancy factors are ca 0.7 and 0.3. The crystal structure is stabilized by N-H⋯N, N-H⋯O and C-H⋯O hydrogen bonds.
authors.forename: Xiang
authors.initials: X
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Ming-Guo
authors.initials: MG
authors.lastname: Liu