A polyurethane with Mo-Mo bonds in the backbone was synthesized by reaction of the ‘diol’{η5-C5H4C(O)CH2OH}2Mo2(CO)6 with 1,6-hexamethylene di-isocyanate; irradiation of the polymer in tetrahydrofuran solution results in cleavage of the metal–metal bonds and subsequent fragmentation of the polymer.
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Tenhaeff et al. (1989) studied this question.
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