Synthesis and Spectroscopic and X-ray Structural Characterization of R₂Sn^IV−Oxydiacetate and −Iminodiacetate Complexes

Abstract

Seven novel R2Sn(IV)-oxydiacetate (oda) and -iminodiacetate (ida) compounds of the form [R2Sn(oda)(H2O)]2 (R = Me, nBu, and Ph) (1-3), [(R2SnCl)2(oda)(H2O)2]n (R = Et, iBu, and tBu) (4-6), and [Me2Sn(ida)(MeOH)]2 (7) have been synthesized and characterized by IR, 1H, 13C, and 119Sn NMR (solution), solid-state 119Sn CPMAS NMR, and (119m)Sn Mössbauer spectroscopy. The crystal structure of [Me2Sn(oda)(H2O)]2, 1, shows it to be dinuclear (centrosymmetric), with two seven-coordinated tin atoms, bridged by one arm of the carboxylate group from each oda. By contrast, the crystal structure of [(Et2SnCl)2(oda)(H2O)2]n, 4, comprises a zigzag polymeric assembly containing a pair of different alternating subunits, {Et2SnCl(H2O)} and {Et2SnCl(H2O)(oda)}, which are connected by way of bridging oda carboxylates, thus giving seven-coordinate tin centers in both components. Finally, the structure of [Me2Sn(ida)(MeOH)]2, 7, also centrosymmetric dinuclear, is comprised of a pair of mononuclear units with seven-coordinate tin. The 119Sn solid-state CPMAS NMR and (119m)Sn Mossbauer suggest the presence of seven-coordinate Sn metal atoms in some derivatives and the existence of two different tin sites in the [(R2SnCl)2(oda)(H2O)2]n compounds.

Synthesis and characterization of a novel spring-like organotin complex containing guest benzene molecules

“…Furthermore, we have also characterized the complex by X-ray crystallography. By search of CSD, we found although so many 1D chain organotin structures have been reported [14][15][16]7,17,18], such 1D spring-like helical chains containing guest solvent molecules are rare.…”

Anionic Bismuth Oxido Clusters with Pendant Silver Cations: Synthesis and Structures of {[Bi4(µ3‐O)2(TFA)9Ag(tol)2]2} and {Bi4(µ3‐O)2(TFA)10(AgPPh3)2}n

“…Given the observation of only one 19 F signal, the AgPPh 3 unit must also be involved in the fluxional process, most likely through dissociation of one or more of the TFA – ligands. The 1 H NMR spectrum clearly showed the phenyl groups bound to phosphorus (7.52–7.62 ppm, multiplet), which were deshielded compared to unbound PPh 3 , due to the electron‐withdrawing Ag + ion . 1 H NMR peaks with δ < 7.5ppm are attributed to impurities from the synthesis, washing, and NMR solvent.…”

Synthesis, Crystal Structure, and Theoretical Calculation of the Cu (II) Complex With 2-Furoic Acid

“…Cu (1) and Cu (2) The Cu(1) Cu(2) bond length in the complex is 2.6369(11) Å, which is shorter than 3.0 Å, indicating the existence of intense coupling effect [15] between Cu(1) and Cu (2). The Cu (1) There exists O H··O and C H··O hydrogen bonds between free water and methanol molecules and the ligands.…”

“…Carboxylate groups are involved in diverse coordination modes [1,2] and their complexes exhibit versatile network topologies and remarkable prospect. [3,4] Therefore, the synthesis of novel complexes using carboxylic acids as the anionic O-donor ligands is one of the hotspot in this field.…”