Distorted into an ellipse, the calix[4]arene units in novel complexes of type 1 bind the hexacoordinate Zr center. In complex 1, which is prepared in two steps by reaction of BuLi, calixarene, and ZrCl4, the ZrCl2 unit can be replaced by Zr(alkyl)2, Zr(alkyl), Zr(butadiene), and Zr(ketone) moieties. These reactions provide access to organometallic fragments bonded to a polyoxo matrix.
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Giannini et al. (1996) studied this question.
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