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A CrCr distance of only 2.394(1) Å was found in the binuclear complex 2, obtainable by decomposition of 1. Extended Hückel calculations gave five energetically similar frontier orbitals for six electrons. The high magnetic moment (μeff = 3.3μB) indicates the presence of a CrCr single bond.
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Noh et al. (1990) studied this question.
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