title: Bis(μ(2)-4-amino-3-nitro-benzoato)bis-(4-amino-3-nitro-benzoato)octa-butyldi-μ(3)-oxido-tetra-tin(IV).
abstract: The tetranuclear molecules of the title compound, [Sn(4)(C(4)H(9))(8)(C(7)H(5)N(2)O(4))(4)O(2)], reside on a crystallographic inversion center. Both the two independent Sn atoms are five-coordinate, with distorted trigonal-bipyramidal geometries. One Sn atom is coordinated by two O atoms of the carboxyl-ate anions, one bridging O atom and two butyl groups and the other Sn atom is coordinated by an O atom of the carboxyl-ate anion, two bridging O atoms and two butyl groups. All the butyl groups are equatorial with respect to the SnO(3) trigonal plane. The mol-ecular structure is stabilized by intra-molecular N-H⋯O hydrogen bonds. In the crystal, pairs of inter-molecular bifurcated acceptor N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into chains along [10]. Weak inter-molecular C-H⋯π and π-π inter-actions [centroid-centroid distance = 3.713 (2) Å] are also observed.
authors: Yip-Foo
authors: YF
authors: Win
authors: Chen-Shang
authors: CS
authors: Choong
authors: Siang-Guan
authors: SG
authors: Teoh
authors: Jia Hao
authors: JH
authors: Goh
authors: Hoong-Kun
authors: HK
authors: Fun
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references: 19171970
references: Acta Crystallogr Sect E Struct Rep Online. 2008 Nov 20;64(Pt 12):m1572-3
references: 21581176