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四配位的配合物结构怎么判断?

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四配位的配合物结构怎么判断?
是四面体还是四边形?
还有如果配体有强场也有弱场那是高自旋还是低自旋?只能算吗
四配位的配合物结构怎么判断?
most time,metal centre has d8 electron configuration,the complex is square planar.
metal centre has d0,d10 (sometime d9) electron configuration,the complex is tetrahedral.
in tetrahedral ligand field,electrons of the metal ion like to take high spin configuration due to T2 is not too high comparing with E.
in square planar complex,it is always low spin.