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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 28, Number 1
JKCSEZ 28(1)
February 20, 1984 

 
Title
The trans Effect of Ligands on the Calculated Dipole Moments for Square Planar [Pt(Ⅱ)Cl(PEt3)2X] The Complexes (X = H, Methyl and Phenyl Group

사각형 [Pt(Ⅱ)Cl(PEt3)2X]형태 착물의 계산한 쌍극자모멘트에 대한 리간드의 trans 효과 (X = H, Methyl, Phenyl Group)
Author
Sangwoon Ahn, Dong Heu Kim, Euisuh Park

안상운,김동희, 박의서
Keywords
Abstract
trans 사각형 [Pt(Ⅱ)Cl(PEt3)2X]형태 착물을 택하여 계산한 쌍극자 모멘트에 대한 리간드의 trans효과를 고찰하여 보았다. 계산한 쌍극자모멘트는 H > Me > Ph > Cl과 같은 순서로 감소하였다. 이 순서는 쌍극자모멘트의 실험치가 감소하는 순서와 일치하며 반응속도에 의하여 결정한 trans 효과가 감소하는 순서와도 일치한다. cis 착물의 계산한 쌍극자모멘트는 trans 착물의 계산한 쌍극자모멘트 보다 훨씬 크며 이것 또한 실험적 사실과 일치한다. 그러나 trans착물의 경우와 달리 몇개의 cis착물의 계산한 쌍극자모멘트는 실험치보다 작은 값을 가진다.

The trans effect of ligands on the calculated dipole moments has been investigated, choosing trans square planar [Pt(Ⅱ)Cl(PEt3)2X] type complexes. The calculated dipole moments decrease in the order H > Me > Ph > Cl which is the same as the order of decreasing the experimental dipole moments. This order is in agreement with the order of decreasing the trans effect as determined by rate of reaction. The calculated dipole moments for cis complexes are markedly higher than those for trans complexes. This is also in agreement with experimental fact. The calculated dipole moments for some of cis complexes are, however, lower than the observed values, which is different from trans complexes.

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