Daqi Wang

Synthesis and crystal structure of a novel pentanuclear complex of tin (IV) with heterocyclic sulfur and nitrogen donor ligands

Abstract A novel macrocyclic complex of organotin was synthesized by the reaction of dibutyltin dichloride with 2,5-dimercapto-1,3,4-thiodiazole. The title pentanuclear complex of tin is a 35-membered macrocycle. All five Sn atoms are six-coordinate, and have distorted octahedron geometries due to intramolecular Sn–N interactions. The title complex is characterized by Elemental analysis, IR, 1 H-NMR spectroscopy and X-ray diffraction.

Synthesis and structural characterization of one- and two-dimensional coordination polymers based on platinum–silver metallic backbones

Seven Pt-Ag coordination polymers [Pt(NH3)2(NHCO(t)Bu)2Ag(H2O)](ClO4) (1), [Pt2(dap)2(NHCO(t)Bu)4Ag2(NO3)(ClO4)] (dap = 1,2-diaminopropane, 2), [Pt2(en)2(NHCO(t)Bu)4Ag2(m-C6H4(CO2)2)].3H2O (en = ethylenediamine, 3), [Pt2(NH3)2(NHCO(t)Bu)2Ag2(p-C6H4(CO2)2)].2H2O (4), [Pt3(en)3(NHCO(t)Bu)6Ag2(p-C6H4(CO2)2)(1.5)].6H2O (5), [Pt(NH3)2(NHCO(t)Bu)4Ag(4-C5H4NCO2)2].10H2O (6), and [Pt2(en)2(NHCO(t)Bu)4Ag2(4-C5H4NCO2)](ClO4) (7) were synthesized from the corresponding [Pt(RNH2)2(NHCO(t)Bu)2] and Ag salts, respectively, and their structures were determined by X-ray crystallography. The Pt and Ag units aggregate into one-dimensional chains based on Pt-Ag backbones. Compounds 1, 2, and 6 possess an extended zigzag Pt-Ag chain motif, and the metallic chains arrange in a parallel fashion into layered structures. Compounds 3-5, and 7 form 2-D brick wall sheets due to the coordination of the bifunctional anions to the Ag+ ions of the neighboring chains. These polymers are constructed based on the Pt-Ag interactions and the coordination of amidate oxygen atoms to Ag ions. There are three kinds of short Pt-Ag bonds observed in the structures of these compounds. The Pt-Ag metallic backbone is formed by the stacking unsupported Pt-Ag bonds, the amidate doubly bridged Pt-Ag bonds, and the amidate singly bridged Pt-Ag bonds. In the chains, the Pt-Ag bond distances are quite short, and appear in the range of 2.78-2.97 A, which are comparable to known Pt-Ag dative bonds.

Synthesis, Crystal Structure and Electrochemical Properties of 2D Network Complex {[K(N18C6)]2(CH3CN)}[Ni(mnt)2] with N18C6 = 2,3-Naphtho-18-Crown-6

A novel 2D network complex [K(N18C6)]2(CH3CN) [Ni(mnt)2] (1) (where N18C6 = 2,3-naphtho-18-crown-6 and mnt = maleonitriledithiolate) has been synthesized and characterized by elemental analysis, FT-IR spectrum, UV-visible spectrum and single crystal X-ray diffraction. The complex molecules are linked into 1D chains by the bridging CH3CN molecules through weak K-N interactions and the result chains are assembled into a novel 2D network through the inter-chain π–π stacking interactions occurred between adjacent naphthylene moieties of N18C6. The cyclic voltammogram of the title complex displays a reversible process corresponding to the [Ni(mnt)2]−/[Ni(mnt)2]2− reaction.

One- or two-dimensional 2,3-naphtho crown ether complexes [Na(N15C5)]2[M(SCN)4] and [K(N18C6)]2[M(SCN)4] (M = Pd, Pt) constructed by π–π stacking interactions

Four novel 2,3-naphtho-15-crown-5 (N15C5) and 2,3-naphtho-18-crown-6 (N18C6) complexes [Na(N15C5)]2[Pd(SCN)4] (1), [Na(N15C5)]2[Pt(SCN)4] (2), [K(N18C6)]2[Pd(SCN)4] (3) and [K(N18C6)]2[Pt(SCN)4] (4) were synthesized and characterized by elemental analysis, FT-IR spectra and single-crystal X-ray diffraction. The structure analyses reveal that both 1 and 2 are assembled into zigzag chains by the strong intermolecular pi-pi stacking interactions between adjacent 2,3-naphthylene groups of N15C5. The molecules of complexes 3 and 4 are linked into 1D chains by the bridging K-O(ether) interactions between the adjacent [K(N18C6)]+ units and the resulting chains are constructed into a novel 2D network by inter-chain pi-pi stacking interactions between the neighboring 2,3-naphthylene moieties of N18C6. According to the supramolecular self-assemblies of complexes 1-4, two types of stacking model of naphthylene groups are given and discussed.

Synthesis and crystal structure characterization of a novel eighteen-tin-nuclear macrocyclic complex

The reaction of sodium salt dihydrate of 2-mercaptonicotinic acid with di-n-butyltin dichloride in benzene affords a novel eighteen-tin-nuclear macrocyclic complex 1, which is a highly centrosymmetric 48-member macrocycle containing two centrosymmetric ladders of hydrolysis.

Synthesis and Crystal Structure of One‐dimensional cis‐syn‐cis‐dicyclohexyl‐18‐crown‐6 Complexes: [Na(DC18C6‐A)]2[M(mnt)2] (M=Pd, Pt)

Two inorganic‐organic hybrid complexes [Na(DC18C6‐A)]2[Pd(mnt)2] (1), and [Na(DC18C6‐A)]2[Pt(mnt)2] (2) (DC18C6‐A=cis‐syn‐cis‐dicyclohexyl‐18‐crown‐6, isomer A; mnt=maleonitriledithiolate) have been obtained by the reaction of dicyclohexyl‐18‐crown‐6 with Na2mnt and PdCl2 or K2PtCl4. Their compositions and crystal structures are characterized by elementary analysis, FT‐IR, UV‐Vis spectroscopy and x‐ray single crystal diffraction. They both crystallize triclinic, space group P ī with crystallographic data: 1, a=10.283(6) Å, b=11.683(7) Å, c=12.681(8) Å, α=100.566(8)°, β=109.686(7)°, γ=100.733(8)°, V=1358.5(14) Å3, Z=1, Dcalcd=1.440 g/cm3, F(000)=616, R 1=0.0290, wR 2=0.0676. 2, a=10.289(6) Å, b=11.691(7) Å, c=12.679(7) Å, α=100.495(8)°, β=109.762(8)°, γ=100.886(8)°, V=1358.6(14) Å3, Z=1, Dcalcd=1.548 g/cm3, F(000)=648, R 1=0.0325, wR 2=0.0514. The two complexes are isomorphous and both display an infinite 1D chain‐like structure formed by [Na(DC18C6‐A)]+ complex cations and [M(mnt)2]2− (M=Pd, Pt) complex anions through N‐Na‐N interactions, indicating that the difference from Pd and Pt has little influence on the supramolecular assembly of the two complexes.

Dibutyl­bis(3-methyl­sulfanyl-1,2,4-thia­diazole-5-thiolato)tin(IV)

# 2005 International Union of Crystallography Printed in Great Britain – all rights reserved In the title complex, [Sn(C4H9)2(C3H3N2S3)2], if weak Sn N interactions are included, the central Sn atom is situated in a skew-trapezoidal bipyramidal geometry, with the basal plane defined by two symmetrically chelating 3-methylmercapto-5mercapto-1,2,4-thiadiazole ligands. The apical positions are occupied by two n-butyl groups. The complex shows a threedimensional network structure assembled by intermolecular S S and C S non-bonded interactions.

Dimethyl­bis(3-methylsulfanyl-1,2,4-thia­diazole-5-thiol­ato)tin(IV)

In the title compound, [Sn(CH3)2(C3H3N2S3)2], the SnIV atom is coordinated within a C2N2S2 donor set that defines a skew-trapezoidal bipyramidal geometry in which the methyl groups lie over the weakly coordinated N atoms. Two independent molecules comprise the asymmetric unit, each of which lies on a mirror plane that passes through the C2Sn unit.