A bidentate bridging coordination of molecular diiodine has been found for the first time in [Rh2(O2CCF3)4I2]⋅I2, which was obtained by deposition from the vapor phase. An X-ray structure reveals a zigzag chain polymer (shown in the picture) formed by alternating [Rh2(O2CCF3)4] and I2 molecules; another diiodine molecule is clathrated within the channels of the network.
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Cotton et al. (2000) studied this question.
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