Family of Polynuclear Nickel Cagelike Phenylsilsesquioxanes; Features of Periodic Networks and Magnetic Properties
2017-10-19T14:51:16Z (GMT)
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A new family of bi-,
tetra-, penta-, and hexanickel cagelike phenylsilsesquioxanes 1–6 was obtained by self-assembly and
transmetalation procedures. Their crystal structures were established
by single-crystal X-ray analysis, and features of crystal packing
relevant to the network formation were studied by a topological analysis.
Compounds 1, 2, and 4 are isolated
architectures, while 3, 5, and 6 present extended 1D and 3D networks. The investigation of magnetic
properties revealed the presence of ferro- (1 and 3–5) or antiferromagnetic (2 and 6) interactions between Ni(II) ions, giving rise
in the most cases (1, 2, and 4–6) to the presence of a slow relaxation of the
magnetization, which can originate from the spin frustration.
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