Homo- and Hetero-bimetallic Flexibly Linked Dinuclear Salphen Complexes
نویسندگان
چکیده
A modification of the previously developed synthetic approach towards dinuclear flexibly linked salphen complexes is successfully utilized for the preparation of heterodinuclear salphen dimers. A dinuclear salphen species with Pd(II) and Cr(III) centers bears a stronger structural resemblance to the related bis-Cr(III) compound than the corresponding mononuclear Cr(III) salphen complex. Therefore, it was considered as a more useful model for the comparison with the homobinuclear Cr(III) complex regarding the catalytic activity in the ring-opening polymerization of β -butyrolactone, for which a bimetallic catalytic mechanism seems to operate. The polymerization results again have shown a higher activity of the homobinuclear Cr(III) complex.
منابع مشابه
Fibrous aggregates from dinuclear zinc(II) salphen complexes.
Metal complexes composed of two zinc(II) salphen units that are bridged by a flexible hydrocarbon chain have been synthesized and characterized. Their self-assembled supramolecular structures were studied with transmission electron microscopy (TEM) and scanning electron microscopy (SEM). It was found that all of the complexes displayed nanofibrillar morphology and that the surface texture and d...
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