Add time:08/24/2019         Source:sciencedirect.com

The mass spectra of Zr(ClO4)4, Hf(ClO4)4 and CU(ClO4)2 are reported. The major fragmentation path for Zr and Hf compounds involves the loss of ClO4· followed by the elimination of Cl2O7 (Cl2O6) and, eventually ClO3·(ClO2·). The copper perchlorate molecular ion dissociates to Cu+ by sequentially splitting off ClO4· radicals. Transformations of coordination polyhedra during fragmentation are predetermined by metal redox properties. The mass spectra were employed to roughly estimate the extent of thermal dissociation of initial molecules under mass-spectrometric experiment conditions.

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