硼化合物的研究——ⅩⅩⅧ.十八氢二十硼酸α,α′-联吡啶合稀土(Ⅲ)配合物的合成和性质

STUDIES ON BORANE COMPOUNDS ⅩⅩⅧ.SYNTHESIS AND CHARACTERIZATION OF DIPYRIDINE COMPLEXES OF RARE EARTH METAL(Ⅲ)B_(20)H_(18)

作者曾报导一系列不同类型的配体稀土阳离子同闭式氢硼酸B_(10)H_(10)^(2-)、B_(12)H_(1?)^(2-)相结合的化合物.B_(20)H_(18)^-氢硼酸根的dipy稀土(Ⅲ)配合物迄今未见报道.本文研究了稀土(Ⅲ)氧化物、十八氢二十硼酸根和α,α′-联吡啶的反应,合成了一些新的配合物。

The dipyridine (dipy) complexes of rare earth(Ⅲ)B_(20)H_(18) were prepared throughfollowing reactions: 3H_2B_(20)H_(18)+Ln_2O_3Mn_2 (B_(20)H_(18))_3 +3H_2OLn_2 (B_(20 H_(18))_3 + 8dipy→(alc)[Ln(dipy)_4]_2 (B_(20)H_(18))_3where Ln = Yb, Tm, Ho, Gd and Sm.All the compounds obtained are solid and soluble in polar solvents, but not in non-polar solvents. They are stable to air and moisture.The complexes were identified by elemental analysis, electroconductivity, IR spectraand TG-DTA measurements. Dipy is found to be Londed to the rare earth via N atom.The molar conductance data indicate that these complexes are ionic and behave as 2:3electrolytes in DMF.