共查询到20条相似文献,搜索用时 31 毫秒
1.
The complexes Me 2SnL 2 ( I ), Me 3SnL ( II ), Et 2SnL 2 ( III ), n‐Bu 2SnL 2 ( IV ), n‐Bu 3SnL ( V ), n‐Oct 2SnL 2 ( VI ), Bz 2SnL 2 ( VII ), and Ph 3SnL ( VIII ), where “L” is ( E )‐3‐(3‐fluorophenyl)‐2‐phenyl‐2‐propenoate, have been prepared and structurally characterized by means of elemental analysis, infrared, mass, and multinuclear ( 1H, 13C, 119Sn) NMR spectral techniques. The spectroscopic results showed that the geometry around the Sn atom in triorganotin(IV) derivatives is four‐coordinated in noncoordinating solvent and behaves as five‐coordinated linear polymers with bridging carboxylate groups or five‐coordinated monomers, both acquiring trans‐R 3SnO 2 geometry for Sn in the solid state. While all the diorganotin(IV) derivatives may acquire trigonal bipyramidal structures in solution due to collapse of the Sn←OCO interaction and octahedral geometries in the solid state, which have been confirmed by the X‐ray crystallographic data of the compound III . The crystal structure of Et 2SnL 2 ( III ) has been determined by X‐ray crystallography and is found skew‐trapezoidal bipyramidal, which substantiates that the ligand acts as an anisobidentate chelating agent, thus rendering the Sn atom six coordinated. The crystal is monoclinic with space group C2 1/ n. All the investigated compounds have also been screened for biocidal and cytotoxicity data. © 2006 Wiley Periodicals, Inc. Heteroatom Chem 17:420–432, 2006; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/hc.20243 相似文献
2.
The diorganotin(IV) complexes of methyl 2‐{4‐hydroxy‐3‐[(2‐hydroxy‐phenylimino)‐methyl]‐phenylazo}‐benzoate (H2L) were obtained by the reaction of ortho‐aminophenol, R 2SnO (R = Me, nBu, or Ph) and methyl 2‐[(E)‐(3‐formyl‐4‐hydroxy)diazenyl]benzoate (H2PL 2) in ethanol, which led to diorganotin(IV) compounds of composition [Me 2SnL] 2 ( 1 ), nBu 2SnL ( 2 ), and Ph 2SnL ( 3 ) in good yield. The 1H, 13C, and 119Sn NMR, IR, the mass spectrometry along with elemental analyses allowed establishing the structure of ligand (H2L) and compounds 1–3 . In all the three cases, 119Sn chemical shifts are indicators of five‐coordinated Sn atoms in a solution state. The crystal structures of ligand H2L and complexes 1 and 2 were determined by a single crystal X‐ray diffraction study. In the solid state, the ligand H2L exists as a keto‐enamine tautomeric form. The molecular structure of complex 1 in the solid state shows a distorted octahedral geometry around a tin atom due to additional coordination with an oxygen atom from a neighboring molecule leading to a four‐membered ring with Sn‐O···Sn‐O intermolecular coordination, leading to a dimeric species. On the other hand, complex 2 is a monomer with trigonal bipyramidal geometry surrounding the tin atom. © 2012 Wiley Periodicals, Inc. Heteroatom Chem 23:457–465, 2012; View this article online at wileyonlinelibrary.com . DOI 10.1002/hc.21037 相似文献
3.
Organotin(IV) dithiocarbamate complexes, RSnClL 2 and R 2SnL 2 (R = Me, Bu, Ph, and L = N-ethyl- N-phenyldithiocarbamate), have been synthesized by the reaction of mono- and disubstituted organotin(IV) with ammonium dithiocarbamate. The complexes were characterized by elemental analyses, and spectroscopic techniques ( 1H, 13C NMR and FTIR). The structures of Me 2SnL 2 and Bu 2SnL 2 were further established by single crystal X-ray diffraction technique. The crystal structure analysis showed that both complexes (Me 2SnL 2 and Bu 2SnL 2) exist as monomers. One of the dithiocarbamate ligands formed a chelate, while the other dithiocarbamate bonded to the central tin atom through one of the sulfur atoms and the second sulfur atom existed as a pendant to form distorted trigonal bipyramidal geometry. The thermal stability of all the complexes was studied using simultaneous thermogravimetry (TG) and differential scanning calorimetry (DSC). The TG-DSC results showed that Me 2SnL 2, BuSnClL 2, Bu 2SnL 2, and PhSnClL 2 displayed similar decomposition pathway via isothiocyanate intermediate, while MeSnClL 2 and Ph 2SnL 2 showed decomposition pathways different from the rest of the complexes. All the complexes resulted in SnS as the final product of the thermal decomposition process. 相似文献
4.
Four novel diorganotin(IV) complexes with general formula R2SnL ( R = nBu, PhCH 2) were synthesized from diorganotin dichlorides and binary Schiff‐bases (H 2L) containing N 2O 2 donor atoms in the presence of sodium ethoxide. The Schiff bases were prepared by reactions of o‐phenylenediamine with 3‐ tert‐butyl‐2‐hydroxy‐5‐methylbenzaldehyde (H 2L 1) and salicylaldehyde (H 2L 2) respectively. The compounds were characterized by elemental analyses, IR, and NMR spectroscopy. The solid‐state crystal structure of the compound nBu 2SnL 1 was determined by single‐crystal structural analysis. 相似文献
5.
Fourteen new diorganotin(IV) complexes of N‐(5‐halosalicylidene)‐α‐amino acid, R′ 2Sn(5‐X‐2‐OC 6H 3CH?NCHRCOO) (where X = Cl, Br; R = H, Me, i‐Pr; R′ = n‐Bu, Ph, Cy), were synthesized by the reactions of diorganotin halides with potassium salt of N‐(5‐halosalicylidene)‐α‐amino acid and characterized by elemental analysis, IR and NMR ( 1H, 13C and 119Sn) spectra. The crystal structures of Bu 2Sn(5‐Cl‐2‐OC 6H 3CH?NCH(i‐Pr)COO) and Ph 2Sn(5‐Br‐2‐OC 6H 3CH?NCH(i‐Pr)COO) were determined by X‐ray single‐crystal diffraction and showed that the tin atoms are in a distorted trigonal bipyramidal geometry and form five‐ and six‐membered chelate rings with the tridentate ligand. Bioassay results of a few compounds indicated that the compounds have strong cytotoxic activity against three human tumour cell lines, i.e. HeLa, CoLo205 and MCF‐7, and the activity decreased in the order Cy> n‐Bu>Ph for the R′ group bound to tin. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
6.
New organotin(IV) carboxylates, [ n-Bu 2SnL 2] ( 1), [Et 2SnL 2] ( 2), [Me 2SnL 2] ( 3), [ n-Oct 2SnL 2] ( 4), [ n-Bu 3SnL] n ( 5), [Me 3SnL] n ( 6), and [Ph 3SnL] n ( 7), where L?=?3-(4-bromophenyl)-2-ethylacrylate, were synthesized and characterized by elemental analysis, FT-IR, and multinuclear NMR ( 1H, 13C, and 119Sn). Spectroscopic studies confirm coordination of L to the organotin moiety via COO group. Single-crystal X-ray analysis reveals bridging mode of coordination in 6. Packing diagram established a supramolecular cage-like structure for 6 due to Sn–O interactions (3.287?Å). Subsequent antimicrobial activities proved them to be active biologically. 相似文献
7.
Four new triorganotin(IV) complexes: Me 3SnL 1SnMe 3 ( 1), Ph 3SnL 1SnPh 3 ( 2), [Me 3SnL 2] n ( 3), Ph 3SnL 2SnPh 3 ( 4) have been synthesized from 6-anilino-1,3,5-triazine-2,4-dithiol (L 1H 2) and 6-(dibutylamino)-1,3,5-triazine-2,4-dithiol (L 2H 2). All were characterized by elemental analyses, IR and NMR spectra and X-ray diffraction analyses. Crystal structures show that 1, 2 and 4 are monomers with one ligand coordinated to two triorganotin moieties; complex 3 is a helical chain. Significant C–H ··· π, N–H ··· π interactions and intermolecular hydrogen bonds stabilize these structures. 相似文献
8.
The addition of 1 equiv of KSCPh 3 to [L RNiCl] (L R={(2,6‐ iPr 2C 6H 3)NC(R)} 2CH; R=Me, tBu) in C 6H 6 results in the formation of [L RNi(SCPh 3)] ( 1 : R=Me; 2 : R= tBu) in good yields. Subsequent reduction of 1 and 2 with 2 equiv of KC 8 in cold (?25 °C) Et 2O in the presence of 2 equiv of 18‐crown‐6 results in the formation of “masked” terminal Ni II sulfides, [K(18‐crown‐6)][L RNi(S)] ( 3 : R=Me; 4 : R= tBu), also in good yields. An X‐ray crystallographic analysis of these complexes suggests that they feature partial multiple‐bond character in their Ni? S linkages. Addition of N 2O to a toluene solution of 4 provides [K(18‐crown‐6)][L tBuNi(SN?NO)], which features the first example of a thiohyponitrite (κ 2‐[SN?NO] 2?) ligand. 相似文献
9.
The organotin(IV) compounds, [Ph 3SnL 1H] n · nCCl 4 ( 1), [Me 2SnL 2(OH 2)] ( 2), [ nBu 2SnL 2] ( 3), [Ph 2SnL 2] n ( 4), [Ph 3SnL 2H] n ( 5) and [Ph 3SnL 3H] n ( 7) (L 1 = 2-{[(2 Z)-(3-hydroxy-1-methyl-2-butenylidene)]amino}phenylpropionate and L 2−3 = 2-{[( E)-1-(2-hydroxyaryl)alkylidene]amino}phenylpropionate), were synthesized by treating the appropriate organotin(IV) chloride(s) with the potassium salt of the ligand in a suitable solvent, while [ nBu 2SnL 3(OH 2)] ( 6) was obtained by reacting the acid form of L 3 (generated in situ) with nBu 2SnO. These complexes have been characterized by 1H, 13C, 119Sn NMR, ESI-MS, IR and 119mSn Mössbauer spectroscopic techniques in combination with elemental analyses. The crystal structures of 1 and 4– 7 were determined. The crystal structures of complexes 1, 5 and 7 reveal that the complexes exist as polymeric chains in which the L-bridged Sn-atoms adopt a trans-R 3SnO 2 trigonal bipyramidal configuration with R groups in the equatorial positions and the axial locations occupied by a carboxylate oxygen from the carboxylate ligand and the alcoholic or phenolic oxygen of the next carboxylate ligand in the chain. The carboxylate ligands coordinate in the zwitterionic form with the alcoholic/phenolic proton moved to the nearby nitrogen atom. A polymeric zig-zag cis-bridged chain structure is observed for 4, without considering the weak Sn⋯O interaction, the Sn-atom having a slightly distorted trigonal bipyramidal coordination geometry with the two O atoms of the tridentate amino propionate ligand in axial positions. On the other hand, the structure of 6 reveals a monomeric molecule in which the Sn-atom has a distorted octahedral coordination geometry involving the tridentate carboxylate ligand, two n-butyl ligands occupying trans-positions and one water ligand. The in vitro cytotoxic activity of triphenyltin(IV) compounds, viz., 1, 5 and 7 against WIDR, M19 MEL, A498, IGROV, H226, MCF7 and EVSA-T human tumor cell lines are also reported. 相似文献
10.
Stannylation Experiments with NH-functional Aminoiminophosphoranes. Synthesis and Structure of the Tricyclic Stannaphosphazenes [Me 2Sn( tBu 2PN)NH] 2 and [ nBu 2Sn(Ph 2PN) 2NH] 2 Aminoiminophosphoranes tBu 2P(NH)NH 2 ( 1 ) and (H 2NPPh 2)N(Ph 2PNH) ( 2 ) react with diaminostannanes R 2Sn(NEt 2) 2 by cyclocondensation to give cyclostannaphosphazenes [Me 2Sn( tBu 2PN)NH] 2 ( 3 ) and [R 2Sn(Ph 2PN) 2NH] 2 ( 4 a , b ) ( a : R = Me, b : R = nBu). With 2 and Me 3SnNEt 2 the ring compound Me 2Sn(Ph 2PN) 2NSnMe 3 ( 5 ) besides Me 4Sn is formed by per-N-stannylation and Sn-methyl group transfer. The crystal structures of 3 and 4 b were determined by X-ray structure analysis. 3 forms a planar heterotricyclus containing three four-membered rings with two pentacoordinated tin atoms (space group P 1 (No. 2); Z = 1). 4 b consists of a tricyclic molecule with two puckered six-membered rings and one planar four membered tin-nitrogen ring with two pentacoordinated tin atoms (space group P 1 (No. 2); Z = 1). 相似文献
11.
The reaction of monomeric [(Tp tBu,Me)LuMe 2] (Tp tBu,Me=tris(3‐Me‐5‐ tBu‐pyrazolyl)borate) with primary aliphatic amines H 2NR (R= tBu, Ad=adamantyl) led to lutetium methyl primary amide complexes [(Tp tBu,Me)LuMe(NHR)], the solid‐state structures of which were determined by XRD analyses. The mixed methyl/tetramethylaluminate compounds [(Tp tBu,Me)LnMe({μ 2‐Me}AlMe 3)] (Ln=Y, Ho) reacted selectively and in high yield with H 2NR, according to methane elimination, to afford heterobimetallic complexes: [(Tp tBu,Me)Ln({μ 2‐Me}AlMe 2)(μ 2‐NR)] (Ln=Y, Ho). X‐ray structure analyses revealed that the monomeric alkylaluminum‐supported imide complexes were isostructural, featuring bridging methyl and imido ligands. Deeper insight into the fluxional behavior in solution was gained by 1H and 13C NMR spectroscopic studies at variable temperatures and 1H– 89Y HSQC NMR spectroscopy. Treatment of [(Tp tBu,Me)LnMe(AlMe 4)] with H 2N tBu gave dimethyl compounds [(Tp tBu,Me)LnMe 2] as minor side products for the mid‐sized metals yttrium and holmium and in high yield for the smaller lutetium. Preparative‐scale amounts of complexes [(Tp tBu,Me)LnMe 2] (Ln=Y, Ho, Lu) were made accessible through aluminate cleavage of [(Tp tBu,Me)LnMe(AlMe 4)] with N, N, N′, N′‐tetramethylethylenediamine (tmeda). The solid‐state structures of [(Tp tBu,Me)HoMe(AlMe 4)] and [(Tp tBu,Me)HoMe 2] were analyzed by XRD. 相似文献
12.
A series of four C, N‐chelated diorganotin(IV) compounds, namely (L CN) 2Sn(OCH 2CH 2O) ( 1 ), [L CNBuSn(OCH 2CH 2O)] 2 ( 2 ), (L CN) 2Sn(1,2‐(O) 2‐3,5‐ tBu 2C 6H 2) ( 3 ) and [L CNBuSn(1,2‐(O) 2‐3,5‐ tBu 2C 6H 2)] 2 ( 4 ) (L CN = 2‐(Me 2NCH 2)C 6H 4), one zinc species, namely L NOZnEt ( 5 ) (L NO = [2‐(MeO)C 6H 4]NC(Me)?C(H)C(Me)?O), and one magnesium complex, namely [L NNMg] 6 ( 6 ), (L NN = [2‐(Me 2NCH 2)C 6H 4]N), were used as catalysts for the synthesis of poly(ethylene terephthalate) (PET) from dimethyl terephthalate and ethylene glycol. Prepared PET samples were primarily characterized using the size exclusion chromatography technique. The highest number‐average molar mass of prepared PET samples reached 10.7 kg mol ?1. Novel dimeric compound 2 was structurally characterized using both multinuclear NMR spectroscopy and X‐ray diffraction analysis. In addition, an alternative synthesis of 1 is described. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
13.
Synthesis and Structure of C,N‐difunctionalized Sulfinimideamides Sulfurdiimides RN=S=NR ( 1 a , b ) react in diethyl ether with two equivalents of lithiummethyl to give dimeric C,N‐dilithiummethylenesulfinimideamide ether adducts {Li 2[H 2C–S(NR) 2 · Et 2O]} 2 ( 2 a , b ) ( a : R = tBu, b : R = SiMe 3). Metathesis of 2 b with four equivalents of Me 3SiCl, Me 3SnCl or Ph 3SnCl yields the corresponding C,N‐bis‐substituted sulfinimideamides R 3EH 2C–S[N(SiMe 3) 2]NER 3 ( 3 – 5 ) ( 3 : R = Me, E = Sn; 4 : R = Ph, E = Sn; 5 : R = Me, E = Si). The crystal structures of 2 a and 2 b were determined by X‐ray structure analysis. Both compounds form centrosymmetric cage structures consisting of two distorted face sharing cubes ( 2 a : space group P1 (No. 2); Z = 2 (4 · 0,5); 2 b : space group C2/ c (No. 15), Z = 4). 相似文献
14.
Reactions of potassium β-{[( E)-1-(2-hydroxyaryl)alkylidene]amino}propionates (L 1HK-L 3HK) and potassium β-{[(2 Z)-(3-hydroxy-1-methyl-2- butenylidene)]amino}propionate (L 4HK) with R 3SnCl (R = Ph and nBu) and nBu 2SnCl 2 yielded complexes of composition Ph 3SnL 1H ( 1), Ph 3SnL 2H ( 2), Ph 3SnL 4H ( 3), nBu 3SnL 1H ( 4), and {[ nBu 2Sn(L 2H)] 2O} 2 ( 5) and {[ nBu 2Sn(L 3H)] 2O} 2 ( 6), respectively. These complexes have been characterized by 1H, 13C, 119Sn NMR, ESI-MS, IR and 119mSn Mössbauer spectroscopic techniques in combination with elemental analyses. The crystal structures of 1, 4, 5 and 6 were determined. In the solid state, compound 1 is a one-dimensional polymer built from SnPh 3 moieties bridged by single carboxylate ligands, but two alternating modes of bridging are present along the polymeric chain. Compound 4 is also a one-dimensional polymer built from SnBu 3 moieties bridged by the two carboxylate O-atoms of a single ligand, but only one mode of bridging is present. Di- n-butyltin compounds 5 and 6 are centrosymmetric tetranuclear bis(dicarboxylatotetrabutyldistannoxane) complexes containing a planar Sn 4O 2 core in which two μ 3-oxo O-atoms connect an Sn 2O 2 ring to two exocyclic Sn-atoms. The four carboxylate ligands display two different modes of coordination where both modes involve bridging of two Sn-atoms. The solution structures were predicted by 119Sn NMR spectroscopy. The in vitro cytotoxic activity of compound 5 against WIDR, M19 MEL, A498, IGROV, H226, MCF7 and EVSA-T human tumor cell lines is reported. 相似文献
15.
The potential catalytic activity of selected C, N‐chelated organotin(IV) compounds (e.g. halides and trifluoroacetates) for derivatization of both dimethyl carbonate (DMC) and diethyl carbonate (DEC) was investigated. Some tri‐, di‐ and monoorganotin(IV) species (L CN( n‐Bu) 2SnCl (1), L CN( n‐Bu) 2SnCl.HCl (1a), L CN( n‐Bu) 2SnI (2), L CNPh 2SnCl (3), L CNPh 2SnI (4), L CN( n‐Bu)SnCl 2 (5), L CNSnBr 3 (6) and [L CNSn(OC(O)CF 3)] 2(μ‐O)(μ‐OC(O)CF 3) 2 (7)) bearing the L CN moiety (L CN = 2‐( N, N‐dimethylaminomethyl)phenyl‐) were assessed as catalysts for reactions of both DMC and DEC with various substituted anilines. The catalytic activities of 4 and 7 for derivatization of DMC with p‐substituted phenols were studied for comparison with the standard base K 2CO 3/Silcarbon K835 catalyst (catalyst 8). The composition of resulting reaction mixtures was monitored by multinuclear NMR spectroscopy, GC and GC‐MS techniques. In general, catalysts 1, 3 and 7 exhibited the highest catalytic activity for all reactions studied, while some of them yielded selectively carbonates, carbamates, lactam or substituted urea. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
16.
A series of new diphenyltin(IV) complexes of the type Ph 2SnL (L 1: N‐phenacyl‐5‐bromosalicylideneimine, Ph 2SnL 1; L 2: N‐phenacyl‐3,5‐dichlorosalicylideneimine, Ph 2SnL 2; L 3: N–phenacyl‐4‐methoxysalicylideneimine, Ph 2SnL 3) were synthesized and characterized by elemental analysis, IR, 1H, 13C, 119Sn NMR spectroscopy and mass spectrometry techniques. The C―Sn―C angles in the complexes were calculated using equations with the 1J( 117/119Sn― 13C) values from 13C NMR spectra. The possible structures, NMR and electronic properties of the studied molecules were calculated through density functional theory and results compared with experimental data. All the complexes were found to be mildly active against several microorganisms and some fungi. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
17.
Organotin(IV) O-butyl carbonodithioates [Me2SnL2], [Bu2SnL2], [Ph2SnL2], [Bu3SnL], and [Ph3SnL], where L = C4H9OCS
–2
, have been successfully synthesized and characterized by FT-IR, 1H and 13C NMR, and single crystal X-ray analysis. The ligand coordinates to the tin atom via the carbonodithioate group. According to the X-ray diffraction data, the tin atom in [Me2SnL2] has distorted tetrahedral geometry. The synthesized compounds were screened in vitro for antibacterial, antifungal, antileishmanial, cytotoxic, and protein kinase inhibitory activities. The complexes [Bu3SnL] and [Ph3SnL] exhibited the highest anti-leishmanial activity that exceeded the activity of the reference drug amphotericin B, probably by blocking the function of parasitic mitochondria due to which it restricts further growth of the organisms. The ligand and the complexes have been shown to bind to DNA via intercalative interactions resulting in hypochromic effect with a minor red shift as confirmed by UV-Vis spectroscopic studies. 相似文献
18.
Abstract Six organotin(IV) complexes of type Me 2SnL 2, Bu 2SnL 2, and Ph 3SnL [where L = indole-3-butyric acid (1, 2 and 3) or indole-3-propionic acid (4, 5 and 6)] have been synthesized by the reactions of the corresponding diorganotin(IV) oxide and triphenyltin(IV) hydroxide with respective indole-3-butyric acid (IBH) or indole-3-propionic acid (IPH) in the desired molar ratios of 1:2/1:1. All of the compounds have been characterized by elemental analysis, IR, 1H NMR, 13C NMR, and 119Sn NMR spectroscopy. Thermal studies of all synthesized complexes have been carried out using thermogravimetry (TG) technique under a nitrogen atmosphere. The thermal decompositions for compounds Me 2SnL 2 and Bu 2SnL 2 occurred in two steps, whereas in compounds Ph 3SnL, it exhibited as three steps decomposition and resulted into the formation of pure SnO 2. The complexes were also screened against three gram-positive ( Staphylococcus aureus, Staphylococcus epidermidis, and Micrococcus luteus) and three gram-negative ( Escherichia coli, Pseudomonas aeruginosa, and Enterobacter aerogenes) bacteria using minimum inhibition concentration (MIC) method, and all of these complexes showed significant antibacterial activity. [Supplementary materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements for the following free supplemental files: Additional text, tables, and figures.] 相似文献
19.
The diorganotin(Ⅳ) complexes of N-(3,5-dibromosalicylidene)-α-amino acid, R2Sn(2-O-3,5-Br2C6H2CH= NCHRCOO)(where R=H, Me, i-Pr, Bz; R'=n-Bu, Cy), were synthesized by the reactions of diorganotin dichlorides with in situ formed potassium salt of N-(3,5-dibromosalicylidene)-α-amino acid and characterized by elemental analysis, IR and NMR (^1H, ^13C and ^119Sn) spectra. The crystal structures of n-Bu2Sn(2-O-3,5-Br2C6H2CH= NCHRCOO)(R=i-Pr, Bz) and Cy2Sn(2-O-3,5-Br2C6H2CH=NCHRCOO)(R=Me, Bz) were determined by X-ray single crystal diffraction and showed that the tin atoms are in a distorted trigonal bipyramidal geometry to form five- and six-membered chelate rings with the tridentate ligand. Bioassay results indicated that the compounds possess better in vitro antitumour activity against three human tumour cell lines, HeLa, CoLo205 and MCF-7, than cis-platin and moderate anti-bacterial activity against two bacteria, E. coli and S. aureus. 相似文献
20.
The Reactions of cyclo ‐Tristannazanes, [(CH 3) 2Sn–N(R)] 3, with the Trimethyl Derivatives of Aluminium, Gallium, and Indium The cyclo‐tristannazanes [Me 2Sn–N(R)] 3 (with R = Me, nPr, iPr, iBu) have been prepared from Me 2SnCl 2 and LiN(H)R in a 1 : 2 molar ratio. With MMe 3 (M = Al, Ga, In) they form the dimeric dimethylmetal trimethylstannyl(alkyl)amides [Me 2M–N(R)SnMe 3] 2 in good yields. The mass, NMR ( 1H, 13C, 119Sn), and vibrational spectra are discussed and compared with the spectra of the tristannazanes. Thermolysis of the gallium amidocompounds splits SnMe 4 to form methylgallium imido derivatives with cage structures. The crystal structures of selected stannylamido complexes have been determined by X‐ray structure analysis. 相似文献
|