Zhengwen Li

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A series of copper(I) amidinates of the general type [(R'NC(R)NR'')Cu](2) (R' and R'' = n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl; R = methyl, n-butyl) have been synthesized and characterized. These compounds are planar dimers, bridged by nearly linear N-Cu-N bonds. Their properties (volatility, low melting point, high thermal stability,(More)
The Chan-Vese model is very efficient in segmenting images. However, the algorithm given by Chan and Vese is sensitive to the initial level set function and the regularization parameter. It is difficult to get a right segmentation if the initial level set function and the regularization parameter are not chosen properly. In this paper, we aim to(More)
A highly volatile asymmetric iron(II) amidinate, iron(II) bis(N-tert-butyl-N -ethylacetamidinate), was synthesized for the first time by systematically changing starting iron(II) compounds such as acetylacetonate, acetate, and chloride, in different media such as diethyl ether, toluene, and tetrahydrofuran. The amidinate has been characterized and compared(More)
Three new volatile cobalt amidinate compounds were prepared: Co(tBuNC(R)NEt)2, R=Me, Et and n-Bu. They were characterized by elemental analysis, 1H NMR, X-ray structure analysis, melting point, vapor pressure, vaporization rate, thermal stability and chemical reactivity. They were found to evaporate cleanly without decomposition. Two of them are liquids at(More)
Three new ruthenium amidinate complexes were prepared: tris(diisopropylacetamidinato)-ruthenium(III), Ru(iPrNC(Me)NiPr)3 4; bis(diisopropyl-acetamidinato)ruthenium(II) dicarbonyl, Ru( iPrNC(Me)NiPr)2(CO)2 5; and bis(ditert-butylacetamidinato)ruthenium(II) dicarbonyl, Ru(tBuNC(Me)NtBu)2(CO)2 6. They have been synthesized and characterized by H NMR, TG and(More)
Institute of Theoretical Chemistry and Computational Materials Science, China UniVersity of Geosciences, Wuhan, People’s Republic of China 430074, Air Products and Chemicals, Inc., 1969 Palomar Oaks Way, Carlsbad, California 92011, Department of Chemistry and Chemical Biology, HarVard UniVersity, Cambridge, Massachusetts 02138, and Air Products and(More)
Jinping Wu,*,† Bo Han,† Chenggang Zhou,† Xinjian Lei,‡ Thomas R. Gaffney,‡ John A. T. Norman,‡ Zhengwen Li,§ Roy Gordon,§ and Hansong Cheng*,‡ Institute of Theoretical Chemistry and Computational Materials Science, China UniVersity of Geosciences Wuhan, Wuhan, China P. R. 430074, Air Products and Chemicals, Inc., 7201 Hamilton BouleVard, Allentown,(More)
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