Tin(IV) complexes of general formula SnRnCl3 –n[HB(mpz)3](R = Me or Ph; n= 0–2; mpz = 4-methylpyrazolyl) have been synthesised and characterised by IR, far-IR, 1H, 13C, 119Sn NMR and 119Sn Mössbauer spectroscopy. Their stability towards self-decomposition decreases with increasing number of Sn-bonded aryl or alkyl groups. In addition, triorganotin(IV) complexes of the same ligand as well as of [HB(pz)3]– and [HB(dmpz)3](pz = pyrazolyl, dmpz = 3,5-dimethylpyrazolyl) have been synthesised and characterised by IR and NMR techniques but, due to their low stability (even in the solid state), could not be characterised by Mössbauer spectroscopy. Both the crystal structures of SnCl3[HB(mpz)3] and SnPhCl2[HB(mpz)3] show the tin atom in a skewed octahedral environment. The structure of the deboronated adduct SnMe2Cl2(Hmpz)2, obtained from attempted recrystallisation of SnMe2Cl[HB(mpz)3], in which the Cl, the Me and the N-donors are in the all-trans configuration, has been determined.
合成了通式 SnRnCl3 –n[HB(mpz)3](R = Me 或 Ph;n= 0–2;mpz =
4-甲基吡唑基)的
锡(IV)配合物,并通过红外、远红外、1H 进行了表征、 13C、 119Sn NMR 和 119Sn 穆斯堡尔谱。它们的自分解稳定性随着
锡键合的芳基或烷基数量的增加而降低。此外,还合成并表征了相同
配体以及 [HB(pz)3]– 和 [HB(dmpz)3](pz =
吡唑基,dmpz =
3,5-二甲基吡唑基)的三
有机锡(IV)配合物通过红外和核磁共振技术,但由于其稳定性低(即使在固态),无法通过穆斯堡尔光谱进行表征。 SnCl3[HB(mpz)3]和SnPhCl2[HB(mpz)3]的晶体结构都显示
锡原子处于倾斜的八面体环境中。脱
硼加合物 SnMe2Cl2(Hmpz)2 的结构已确定,该加合物是通过尝试重结晶 SnMe2Cl[HB(mpz)3] 获得的,其中 Cl、Me 和 N 供体均处于全反式构型。