Chiral dimethylindiumaminoalkoxides of general formula Me21nOR* [OR' = (+);(-)-2piperidyl-methoxy (11, (+);(-)-dimethylamino-2-propoxy (21, (S)-(+)-amino-2-propoxy (31, (3-n, a-diphenyl-2-pyrrolidinyl-methoxy (411 have been prepared by reaction of MeJn with the corresponding aminoalcohols HOR* and characterized by 'H and I3C nmr spectroscopy and X-ray crystallography. Dimeric molecules of 1-4 are composed of two p2-O-bridged chelating rings, the latter formed due to N-In donor-acceptor interaction. This geometry is comparable with that of aluminium and gallium analogues previously investigated. In the case of 1 and 4, the formation of the N-In bond proceeds stereospecifically. The absolute structure of 3 and 4 was confirmed by refinement of the Flack parameter.1: C2/rn; a = 15.999(3) A, b = 9.803(2) A, c = 7.410(1) A, = 111.04(3)"; Z = 2; density (calc.) 2: C2/c; a = 13.184(3) A, b = 9.987(2) A, c = 15.851(3) A, p = 90.66(3)"; Z = 4; density (calc.
Multiferroic magnetoelectric composite systems such as ferromagnetic‐ferroelectric heterostructures have recently attracted an ever‐increasing interest and provoked a great number of research activities, driven by profound physics from coupling between ferroelectric and magnetic orders, as well as potential applications in novel multifunctional devices, such as sensors, transducers, memories, and spintronics. In this Review, we try to summarize what remarkable progress in multiferroic magnetoelectric composite systems has been achieved in most recent few years, with emphasis on thin films; and to describe unsolved issues and new device applications which can be controlled both electrically and magnetically.
The title compound, C6H8NO3P, is isostructural with p-arsanilic acid. It exists as the zwitterion H3N+C6H4PO3H−. In the crystal, molecules are linked by O—H⋯O and N—H⋯O hydrogen-bond bridges, giving a three-dimensional network structure. The strongest hydrogen bonds are formed between adjacent PO3H groups with O⋯O distances of 2.577 (2) Å.
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