Di(imino)aryltin(iv) dichlorides as tectons for heterometallic coordination compounds

Abstract

Hydrolysis of [2-{(CH2O)2CH}C6H4]2SnCl2 (1) [prepared from 2-[(CH2O)2CH]C6H4MgBr and SnCl4, in 2 : 1 molar ratio] gave [2-(O=CH)C6H4]2SnCl2 (2). Treatment of with the appropriate amine, in the absence of a solvent or catalyst, resulted in the isolation in high yields of [2-(RN[double bond, length as m-dash]CH)C6H4]2SnCl2 [R = 2'-C10H7 (3), 2',4',6'-Me3C6H2 (4), PhCH2 (5), Me2NCH2CH2 (6), 2'-PyCH2 (7)]. The reaction of with [Pd(COD)Cl2] provided the heterometallic species [Cl2Pd{2-(2'-PyCH2N[double bond, length as m-dash]CH)C6H4}2SnCl2] (8). The compounds were characterised by multinuclear NMR spectroscopy in solution, and mass spectrometry and IR spectroscopy in the solid state. The molecular structures of 1, 2, 4-7 and 8·CH3CN were established by single-crystal X-ray diffraction. For all diorganotin(IV) dichlorides intramolecular O→Sn or Nimine→Sn coordination results in hypercoordinated species with a distorted octahedral (C,E)2SnCl2 core (E = O, N). The presence of intramolecular N→Sn interactions in solution, responsible for the restriction of free rotation of mesityl groups around the C-N(=C) single bonds, is suggested by (1)H and (13)C NMR data. In the heterometallic dinuclear complex 8 the octahedral coordination around tin is preserved as in 7 and the nitrogen atoms from the pyridyl groups in the pendant arms are coordinated to palladium, leading to a trans-square planar PdCl2N2 core.

Crystal structure of a 1,1-dibutyl-1H,3H-naphtho[1,8-cd][1,2,6]oxastannaborinin-3-ol

“…4. The CSD lists three stannanols, all of which are triaryl stannanols (Rů žička et al, 2013; Barbul et al, 2012). For those compounds, the Sn-O bond has a length of 1.981 to 2.057 Å , agreeing with the bond length of 2.0041 (17) Å found for the title compound.…”

Functionalization of Sn/S Clusters with Hetero- and Polyaromatics

“…The first is where the organic ligand shell has a purely protective role to inhibit thermodynamically preferred particle growth by kinetic stabilization of the (intermediate) cluster . The second is where the organic ligands possess donor atoms or aromatic groups for further coordinative or dispersive interaction with metal atoms, ions, or metal surfaces. , The third is where the organic molecules possess a functional group, making them reactive toward other molecules with complementary functionality.…”

[Ag(EtOH){Ph3Bi[O(O)CC5H4N-3]2}(ClO4)]•CHCl3 – A coordination polymer based on a divergent, ditopic metalloligand

“…Cu(II), 9 Mn(II), Ni(II) or Zn(II) 10 complexes. Organotin(IV) compounds containing the same 4-pyridyl group as part of an organic ligand attached to the group 14 metal were used to prepare discrete Pd(II)/Sn(IV) 11 and Zn(II)/Sn(IV) 12 heterometallic species.…”