title: Bis(μ(2)-2-amino-5-nitro-benzoato)bis-(2-amino-5-nitro-benzoato)octa-butyldi-μ(3)-oxido-tetra-tin(IV).
abstract: In the title complex, [Sn(4)(C(4)H(9))(8)(C(7)H(5)N(2)O(4))(4)O(2)], all four Sn(IV) atoms are five-coordinated with distorted trigonal-bipyramidal SnC(2)O(3) geometries. Two Sn(IV) atoms are coordin-ated by two butyl groups, one benzoate O atom and two bridging O atoms, whereas the other two Sn(IV) atoms are coordinated by two butyl groups, two benzoate O atoms and a bridging O atom. All the butyl groups are equatorial with respect to the SnO(3) trigonal plane. In the crystal, mol-ecules are linked into a two-dimensional layer parallel to the ab plane by inter-molecular N-H⋯O and C-H⋯O hydrogen bonds and further stabilized by a π-π inter-action [centroid-centroid distance = 3.6489 (11) Å]. Intra-molecular N-H⋯O and C-H⋯O hydrogen bonds stabilize the mol-ecular structure. Two of the butyl groups are each disordered over two sets of sites with site-occupancy ratios of 0.510 (4):0.490 (4) and 0.860 (5):0.140 (5).
authors.forename: Yip-Foo
authors.initials: YF
authors.lastname: Win
authors.forename: Chen-Shang
authors.initials: CS
authors.lastname: Choong
authors.forename: Siang-Guan
authors.initials: SG
authors.lastname: Teoh
authors.forename: Chin Sing
authors.initials: CS
authors.lastname: Yeap
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2008 Nov 20;64(Pt 12):m1572-3
references.pmid: 21581176
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2011 Aug 1;67(Pt 8):m1018-9
references.pmid: 22090816
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2010 Oct 13;66(Pt 11):m1406-7
references.pmid: 21588838
references.citation: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references.pmid: 19171970
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2010 Nov 30;66(Pt 12):m1698-9
references.pmid: 21589351