thermogravimetric analysis, and IR spectral studies. The trivalent lanthanide ions have a coordination number of ten in the series Ln(TFAA)3dipy·2H2O. Their avidity to enhance their coordination number is so great that een in the presence of three such bulky ligands as heptafluorooctane dione the Ln(fod)3 still coordinates with o-phen. Hexacoordinated trivalent lanthanides act as LIS reagents but it has been observed
通式为Ln(
TFAA)3 o-phen,Ln(
TFAA)3 dipy·2H 2 O,Ln(dpm)3 im,Ln(dpm )的三价
镧系元素(Pm和Lu除外)和
钇的六十种新络合物)3 pz和Ln(fod)3 o-phen,其中
TFAA =三
氟乙酰基
丙酮-H,dpm = 2,2,6,6-四甲基
3,5-庚烷二酮-H,fod = 1,1,1, 2,2,3,3-七
氟,7,7-二甲基4,6-
辛烷二酮-H,o-phen = 1,10-
菲咯啉,dipy = 2,2'dipyridyl,im =
咪唑和pz =
吡唑,已通过元素分析,熔点,摩尔电导,磁化率,热重分析和红外光谱研究合成并表征。三价
镧系离子在Ln(
TFAA)系列中的配位数为103枇·2H 2 O.它们的亲合力,以提高他们的配位数是如此之大,在EEN的三个这样的大体积
配体如heptafluorooctane存在二酮的LN(FOD)3仍然坐标与邻苯。六