SYNTHESIS AND SPECTROSCOPIC (IR, 1H, 13C, AND 119Sn NMR) CHARACTERIZATION OF MONO- AND DIORGANOTIN(IV) COMPLEXES CONTAINING STERICALLY HINDERED N-ARYLSALICYLALDIMINATE GROUPS

Synthesis and spectroscopic characterization of new adducts of diorganotin(IV) dichlorides with an asymmetric schiff base ligand

“…Over the recent decades, studies on coordination of schiff bases to organotin(IV) compounds have received considerable attention with respect to their potential applications in medicinal chemistry and biotechnology and their structural variety [1][2][3][4][5]. Schiff bases in neutral and deprotonated forms react with organotin(IV) halides and the complexes that are formed exhibit variable stoichiometry and different modes of coordination [6][7][8][9][10][11].…”

Synthesis and Characterisation of some tin(IV) and Methyltin(IV) Complexes with Oximes and Related Schiff's Base Ligands

“…In the absence of a single crystal X-ray diffraction analysis of at least one representative compound, it is difficult to comment on the structures of these derivatives, yet spectroscopic investigations together with molecular weight measurements and FAB Mass spectral studies of some of these complexes indicate non-participation of the heteroatom of the ring of the internally functionalised ligand moieties and retention of the cis-configuration around the tin atom in these monomeric complexes. Presence of similar patterns for NMR chemical shifts for bis (acetylacetonato)Sn(L) n Cl 2-n (L = Schiff's bases and oximates) and for bis(acetylacetonato)methyloximatotin(IV) complexes, together with the value of the 119 Sn NMR chemical shift in the range of hexa-coordination, suggest a distorted cis-octahedral environment in these complexes and the following tentative structure may be proposed for these derivatives: (1,2,(5)(6)(7)(8)(9) and L' = Cl (3,4) or Me (10)(11)(12)(13)(14)(15).…”

“…Multidentate ligands such as Schiff's bases and oximes have also attracted considerable attention because of their remarkable structural diversity and biological implications. [7][8][9][10] Our earlier studies on organotin(IV) complexes with functionalised oximes revealed quite interesting results with unique stannoxane networks. [11][12][13][14][15] In continuation to above we prepared some new heteroleptic derivatives of bis(acetylacetonato)tin(IV) and bis(acetylacetonato)methyltin(IV) with some internally functionalised Schiff's bases and with simple as well as internally functionalised oximes.…”

“…Fig. 3 Proposed structure of [Sn(acac) 2 LL'] [where L = L' = {O(CH 2 ) 3 N=C(Me)Ar}and {ON =C(R)Ar'}(1,2,(5)(6)(7)(8)(9) and L' = Cl(3,4) or Me(10)(11)(12)(13)(14)(15).…”

Synthesis and Spectroscopic Characterisation of the First Series of Heterohimetallic Butyltin(IV) Derivatives Based on N—(1-hydroxyethyl) Salicylaldiminate Moieties

“…, Ga(OPr')3 , Ti(OPr')4 , Nb(OPr') 5 , and Ge(OEt) 4 in benzene afford novel heterobimetallic heterocyclic organotin(IV) derivatives (Equimolar reaction of (1) with A](L)(OPr') produces a derivative of composition BuSn(L) 3 Al(7)(Scheme 3), in which tin ( 119 Sn NMR : δ -473.0) and aluminium ( 27 A1 NMR : δ 14.5) are six-and five-coordinate, respectively.…”