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The asymmetric unit of the title cocrystal, [Sn(CH3)(C6H5)Cl2(H2O)2]·C10H20O5, contains two independent for­mula units. The organotin molecules exhibit a six-coordinate metal atom and are linked to the crown ether molecules by water–crown ether O—H...O hydrogen bonds into a linear chain running along [101]. Each coordinated water mol­ecule forms a pair of hydrogen bonds to the same crown ether; for the crown ether mol­ecules, only four of the five O atoms are engaged in hydrogen-bonding inter­actions. The metal ions show a distorted trans-C2SnCl2O2 octa­hedral coordination geometry [C—Sn—C = 175.3 (1) and 178.9 (1)°].

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The Sn, Cl and water O atoms of the title compound, [Sn2(CH3)4Cl4(H2O)2]·C10H20O5, lie on a special position of 2 site symmetry. The SnIV atom shows cis-C2SnCl2O trigonal–bipyramidal coordination [C—Sn—C = 157.0 (1)°]; however, two [Me2SnCl2(H2O)] units are linked by a tin–chlorine bridge [Sn←Cl = 3.247 (1) Å] across a center of inversion, generating a dinuclear species, so that the geometry is better regarded as a mer-C2SnCl3O octa­hedron. The crown ether inter­acts through O—H...O hydrogen with the metal atom through the coordinated water mol­ecules in an outer-sphere manner, generating a hydrogen-bonded chain running along [101]. The 15-crown-5 mol­ecule is disordered over the 2/m site.

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In the title compound, [PbBr2(C14H12N2)]n, the PbII atom lies on a twofold rotation axis. The N-heterocycle-chelated PbII atom exists in a distorted octa­hedral geometry owing to two long Pb...Br inter­actions [2.9562 (5) and 3.2594 (5) Å]. These result in a zigzag chain running along the c axis. The lone pair is stereochemically inactive.

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In the title salt, (C13H14NO2)[Sn(C10H6NO2)Cl4], the SnIV cation is N,O-chelated by the quinolincarboxyl­ate unit and further coordinated by four Cl anions in a distorted octa­hedral geometry. In the crystal, the 2-[(propan-2-yl­oxy)­carbon­yl]quinolin-1-ium cation is linked to the Sn complex anion by an N—H...O hydrogen bond.

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The reaction of 8-hy­droxy­quinoline, 2-methyl­quinolin-8-ol and stannic chloride yields the protonated 8-hy­droxy-2-methyl­quinolinium species. In the title salt, (C10H10NO)[Sn(C9H6NO)Cl4], the SnIV cation is N,O-chelated by the quinolin-8-olate anion and is further coordinated by four Cl anions in a distorted cis-SnNOCl4 octa­hedral geometry. In the crystal, the cation is linked to the anion by an O—H...O hydrogen bond.

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The reaction of 4-(dimethyl­amino)­pyridine, picolinic acid and stannic chloride yields the title monosolvated salt, (C13H10NO)[SnCl4(C6H4NO2)]·CH3OH. The SnIV atom is N,O-chelated by the picolinate ion in a cis-SnNOCl4 octa­hedral geometry. The cation is linked to the methanol solvent mol­ecule by an O—H...O hydrogen bond; the solvent mol­ecule itself is a hydrogen-bond donor to the uncoordinating carboxyl­ate O atom of the anion. The cations and anions are linked by weak N—H...Cl inter­actions, forming a chain running along the b axis.

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The reaction of 4-(dimethyl­amino)­pyridine, picolinic acid and stannic chloride yields the title salt, (C7H11N2)[SnCl4(C6H4NO2)], in which the SnIV atom is N,O-chelated by the picolinate ion in a cis-SnNOCl4 octa­hedral geometry. The cation is linked to the anion by an N—H...O hydrogen bond.

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In the title monomeric trimethyl­tin(IV) isothio­cyanate–4,4-dimethyl­pyridine adduct, [Sn(CH3)3(NCS)(C7H10N2)], the SnIV atom shows a trans-C3SnN2 trigonal bipyramidal coordination. The SnIV atom lies out of the equatorial plane by 0.033 (4) Å in the direction of the donor N atom of the N-heterocycle. The crystal studied was a non-merohedral twin with a minor component of 48.8 (2)%.

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The cupferronate ions in the centrosymmetric dinuclear title compound, [Pb2(C6H5N2O2)4], O,O′-chelate to the two PbII atoms; two of the four nitroso O atoms are also involved in bridging. The geometries of the five-coordinate PbII atoms in the two independent mol­ecules are Ψ-octa­hedral; if more remote Pb...O inter­actions are also considered, the coordination number is increased to six for one mol­ecule and to seven for the other. Their coordination polyhedra are ill defined in the chain motif, which runs along [100].

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The SnIV atom in the title compound, [Sn(CH3)2(NCS)2(C12H8N2)], is located on a twofold rotation axis in a distorted octa­hedral enviroment. The methyl groups are trans to each other [C—Sn—C = 175.7 (3)°], whereas the thio­cyanate groups are cis to each other.

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The tetra­nuclear title compound, [Sn4(CH3)8(C2H5O)2O2(C3H4N3S)2], lies about a center of inversion; the mol­ecule features a three-rung-staircase Sn4O4 core in which two SnIV atoms are bridged by the 4-methyl-5-sulfanyl­idene-4,5-dihydro-1H-1,2,4-triazol-1-ide group. The negatively charged N atom of the group binds to the terminal SnIV atom at a shorter distance [Sn—N = 2.240 (3) Å] compared with the neutral N atom that binds to the central SnIV atom [Sn← N = 2.641 (3) Å]. The terminal SnIV atom is five-coordinate in a cis-C2SnNO2 trigonal–bipyramidal geometry [C—Sn—C = 127.5 (2)°], whereas the central SnIV atom is six-coordinate in a C2SnNO3 skew-trazepoidal bipyramidal geometry [C—Sn—C = 145.0 (2)°].

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The tetra­nuclear title compound, [Sn4(CH3)8(C3H7O)2O2(C3H4N3S)2], lies about a center of inversion; the mol­ecule features a three-rung-staircase Sn4O4 core in which two SnIV atoms are bridged by the 4-methyl-5-sulfanyl­idene-4,5-dihydro-1H-1,2,4-triazol-1-ide group. The negatively charged N atom of the group binds to the terminal SnIV atom at a shorter distance [Sn—N = 2.236 (2) Å] compared with the neutral N atom that binds to the central SnIV atom [Sn← N = 2.805 (2) Å]. The terminal SnIV atom is five-coordinate in a cis-C2SnNO2 trigonal–bipyramidal geometry [C—Sn—C = 136.4 (1)°], whereas the central SnIV atom is six-coordinate in a C2SnNO3 skew-trazepoidal bipyramidal geometry [C—Sn—C = 145.4 (1)°]. The C atoms of the isopropoxy group are disordered over two positions in a 0.591 (7):0.409 (7) ratio.

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In the title compound, [Sn2(CH3)6(NCS)2(C24H22N4)], the 1,2,3,4-tetra­kis­(pyridin-4-yl)butane ligand uses the pyridine N atoms at the ends of the butyl chain to coordinate to two trimethylthiocyanatotin(IV) units, forming a dinuclear structure. The SnIV atom in the mol­ecule shows a distorted trans-trigonal–bipyramidal coordination with the methyl groups in equatorial positions. The mol­ecule lies on a center of inversion, with the mid-point of the butyl chain coinciding with this symmetry element. In the crystal, weak C—H...π inter­actions occur between pyridine rings of adjacent mol­ecules.

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The SnIV cation in the title compound, [Sn(CH3)2(C10H8NO)2], is N,O-chelated by two 2-methyl­quinolin-8-olate anions and coordinated by two methyl groups in a skew-trapezoidal bipyramidal geometry. In the mol­ecule, the two quinoline ring systems are twisted to one another at 10.91 (18)°. The dimethyl­tin skeleton [C—Sn—C = 149.6 (2)°] is bent over the longer edge of the trapezoid that is defined by the four chelating atoms. Weak inter­molecular C—H...O hydrogen bonding occurs in the crystal.
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