title: Biphenyl-3,3',4,4'-tetra-amine.
abstract: The title compound, C(12)H(14)N(4), has a crystallographically imposed centre of symmetry. Inter-molecular N-H⋯N hydrogen bonds between amino groups link adjacent mol-ecules into a three-dimensional network where ten-membered hydrogen-bonded rings are observed.
authors.forename: Hui-Fen
authors.initials: HF
authors.lastname: Qian
authors.forename: Wei
authors.initials: W
authors.lastname: Huang