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N,N-二(2,6-二异丙基苯基)-2,4-戊二亚胺的锂盐与二甲基二氯化锡的反应以及N,N-二(2,6-二乙基苯基)-2,4-戊二亚胺的锂盐与三甲基氯化锡的反应均以物质的量比为1∶1在室温下进行,分别得到了新化合物N(Ar)=C(Me)CH=C(NHAr)CH_2SnMe_2Cl·C_7H_8(1)(Ar=2,6-iPr_2C_6H_3)和[N(Ar’)C(Me)=CHC(=NAr’)CH_2SnMe_2]_2·CH_2Cl_2(2)(Ar’=2,6-Et_2C_6H_3).通常来说,β-二亚胺配体与金属卤化物反应容易形成氮-金属-氮键,而化合物1和2中由于SnMe_2Cl与SnMe_3基团的路易斯酸性使得锡-氮键断裂和锡-碳键的生成得到了少见的氮-锡-碳键.化合物2是罕见的具备两个共振结构式的锡二聚体.通过核磁共振、元素分析及X射线单晶衍射分析鉴定了这两种化合物的结构.通过这两个结构的对比探讨了二聚体2的形成机理.
The reaction of the lithium salt of N, N-bis (2,6-diisopropylphenyl) -2,4-pentanediimine with dimethyltin dichloride and the reaction of N, N-bis Diethylphenyl) -2,4-pentanediimine and trimethyltin chloride were all carried out at a molar ratio of 1: 1 at room temperature to obtain novel compounds N (Ar ) = C (Me) CH = C (NHAr) CH_2SnMe_2Cl · C_7H_8 (1) Ar = 2,6-iPr_2C_6H_3 and [N (Ar ’) C (Me) = CHC (= NAr’) CH_2SnMe_2] _2 · CH_2Cl_2 (2) (Ar ’= 2,6-Et_2C_6H_3). Generally speaking, the reaction of β-diimine ligand with metal halide tends to form nitrogen-metal-nitrogen bond, while in compounds 1 and 2, SnMe_2Cl and SnMe_3 The Lewis acidity of the clusters made rare-earth nitrogen-tin-carbon bonds due to the tin-nitrogen bond cleavage and the tin-carbon bond formation. Compound 2 is a rare tin dimer with two resonance structures. And X-ray single crystal diffraction analysis identified the structure of these two compounds through the comparison of these two structures to explore the dimer 2 formation mechanism.