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Date: 5-7-2020
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Date: 11-6-2020
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Date: 23-2-2018
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Square pyramid Geometry: Oxovanadium salts (Vanadyl, VO2+) often show square pyramidal geometry, for example, VO(acac)2. Note that the Vanadium(IV) can be considered coordinatively unsaturated and addition of pyridine leads to the formation of an octahedral complex.
Trigonal Bipyramid Geometry: The structure of [Cr(en)3][Ni(CN)5] 1.5 H2O was reported in 1968 to be a remarkable example of a complex exhibiting both types of geometry in the same crystal. The reaction of cyanide ion with Ni2+ proceeds via several steps:
with log(β4)=30.1
Figure 1: [Ni(CN)5]3-
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أعمال نشر السواد في مرقد الإمامين العسكريين (عليهما السلام) لاستقبال شهر الأحزان محرم الحرام 1446
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