Dichlorido{μ3-6,6′-dieth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato}octa­methyldi-μ3-oxido-tetra­tin(IV)

In the title tetra­nuclear tin(IV) complex, [Sn4(CH3)8(C20H22N2O4)Cl2O2], there are three completely different tin-atom coordinations. One metal atom (site symmetry 2) adopts a distorted penta­gonal-bipyramidal SnC2N2O3 coordination arising from the N,N′,O,O′-tetra­dentate deprotonated Schiff base, two methyl groups in the axial sites and a μ3-O atom that also bonds to two further Sn atoms. Two symmetry-equivalent Sn atoms adopt very distorted SnC2O4 arrangements that could be described as penta­gonal-bipyramidal with one equatorial vertex missing and the C atoms in the axial site. The final Sn atom (site symmetry 2) adopts an SnC2Cl2O trigonal-bipyramidal arrangement, with Cl atoms in the axial sites. As well as the two Sn atoms, one O atom lies on a twofold rotation rotation axis, and another is disordered about the axis. The terminal eth­oxy group is disordered over two sets of sites with equal occupancy

Bis[4-(dimethyl­amino)pyridinium] tetra­bromidocuprate(II)

The metal atom in the anion of the title salt, (C7H11N2)2[CuBr4], shows a distorted tetra­hedral coordination. The primary contacts between the ions are of the N—H⋯Br type

Bis(trimethyl­phenyl­ammonium) tetra­bromidobis(4-chloro­phen­yl)stannate(IV)

The SnIV atom in the title salt, [N(CH3)3(C6H5)]2[SnBr4(C6H4Cl)2], exists in a distorted all-trans SnC2Br4 octa­hedral geometry. The SnIV atom lies on a center of inversion. Weak inter­molecular C—H⋯Br hydrogen bonding is observed between trimethyl­phenyl­ammonium cations and the Sn complex anion in the crystal structure

catena-Poly[[cyclo­hexyl­diphenyl­tin(IV)]-μ-hydroxido-κ2 O:O]

The title polymeric mixed-organyl tin hydroxide, [Sn(C6H5)2(C6H11)(OH)]n, hass a hydroxide-bridged chain structure; the tin center shows trans-C3SnO2 trigonal bipyramidal coordination. The Sn atom lies on a special position of site symmetry m; the symmetry element relates one phenyl ring to the other and also relates one half of the cyclo­hexyl ring to the other half

Bis(trimethyl­phenyl­ammonium) tetra­bromidocuprate(II)

The crystal structure of the title compound, (C9H14N)2[CuBr4], consists of two quarternary ammonium cations and a tetra­hedral cuprate anions. Weak C—H⋯Br hydrogen bonding is present between the cation and anion in the crystal structure

Bis[4-(dimethyl­amino)pyridinium] 3.75-bromido-0.25-chloridodiphenyl­plumbate(IV)

The PbIV atom of the plumbate dianion in the title compound, (C7H11N)2[Pb(Br3.75Cl0.25)(C6H5)2], lies on a centre of inversion in a tetra­gonally compressed octa­hedral geometry. One of the attached Br atoms is disordered with respect to a Cl atom in a 7:1 ratio. The disordered halogen atom is an N—H⋯(Br/Cl) hydrogen-bond acceptor for the cation

Bis[4-(dimethyl­amino)pyridinium] tetra­bromidodiphenyl­plumbate(IV)

The PbIV atom of the anion of the title salt, (C7H11N2)2[PbBr4(C6H5)2], is situated on a crystallographic center of inversion and exhibits a tetra­gonally compressed octa­hedral coordination. One of the two independent Br atoms acts as a hydrogen-bond acceptor towards the NH group of the cation

catena-Poly[[tribenzyl­tin(IV)]-μ-(E)-3-phenyl­prop-2-enoato-κ2 O:O′]

The SnIV atom in the title carboxyl­ate-bridged polymer, [Sn(C7H7)3(C9H7O2)]n, exists in a trans-C3SnO2 trigonal–bipyramidal geometry (average covalent Sn—O = 2.167 Å, average dative Sn—O = 2.361 Å and average O—Sn—O = 169.6°). The polymer propagates as a helical chain along the b axis with a repeat distance that is half the b-axial length. There are four independent formula units in the asymmetric unit; two are disposed about a false center of inversion with respect to the other two so that the space group emulates a centric space group

Bis{2-[bis­(2-hy­droxy­eth­yl)amino]­acetato-κ3 O,N,O′}zinc(II)

In the crystal structure of the zinc(II) complex of bicine, [Zn(C6H12NO4)2], the deprotonated amino acid O,N,O′-chelates to the metal atom through a carboxyl­ate O atom, a hy­droxy O atom and the N atom, the three atoms occupying fac positions of the distorted octa­hedron surrounding the metal atom. The metal atom lies on a center of inversion. The uncoordinated carboxyl­ate O atom is hydrogen bonded to the hy­droxy groups of adjacent mol­ecules, these two hydrogen bonds leading to the formation of a three-dimensional network