Add time:09/03/2019         Source:sciencedirect.com

The crystal structures were determined for four novel and two earlier reported mixed ligand complexes of Ca, Sr and Ba hexafluoroacetylacetonates with two tetradentate polyglymes – triethyleneglycol dimethyl and monomethyl ethers (triglyme and trigmo respectively). The new compounds [M(hfa)2(trigmo)]2 have identical compositions and similar dimeric structures for M = Ca, Sr and Ba, while the volatile mixed ligand complexes with triglyme demonstrate a variety of compositions and structures depending on central ion. Among the Ba complexes, the novel volatile ionic supramolecular extraordinary crystal [Ba(hfa)(triglyme)2]2[Ba(hfa)4] was revealed. The thermal behavior in the gas phase for the full set of mixed ligand AEE hexafluoroacetylacetonates with tetraglyme, triglyme, trigmo and diglyme was discussed on the base of mass spectrometry and DFT calculations.

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