The whole molecule dichromate ion (Cr2O7)-2 is non planer and polar and oxygen atom of (Cr-O-Cr) oxy-linkage does not involve in delocalization due to maximum repulsion hence two Cr-O bond have equal length and bond order may be/equal to one while other six Cr=O bond have eqaual bond length.
In dichlorine heptaoxide (Cr2O7)-2 , two (CrO4 )-2 group connected with an oxygen atom which is sp3 hybridised (non planer) and bond angle may be expected 109⦁28’ but actually due to the presence of two lone pair on oxygen atom the Cr-O-Cr bond angle deviated from ideal and it may be greater (119⦁) than ideal bond angle.
What is the structure and structural characteristic of dichlorine heptaoxide (Cl2O7)-2?
Classification of oxides on basis of oxygen content:
(1) Normal Oxides:
(2) Sesqui Oxides:
(3) Mixed Oxides:
(4) Peroxides:
(5) Super Oxides:
(6) Suboxides:
(7) Perovskites:
(8) Spinel Oxides:
(9) Cage like Oxide:
Others oxides
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