James C. Barborak
University of North Carolina at Greensboro
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Featured researches published by James C. Barborak.
Journal of the American Chemical Society | 2011
Chen Cheng; Damien Guironnet; James C. Barborak; Maurice Brookhart
Conjugated polymers possessing a poly(2,5-dimethylene-2,5-dihydrofuran) backbone were prepared through postpolymerization reaction of styrenic polyketones with bromine in one-pot reactions. The modification is proposed to proceed via condensation of two repeating units to form a fully characterized polymer with a poly(2,5-dimethylenetetrahydrofuran) backbone. Subsequent bromination and elimination of HBr yield a polymer with a fully conjugated carbon backbone. The new conjugated polymers were characterized by NMR, IR, and UV-vis spectroscopies and by CV. These polymers have strong absorption in the visible region, with the absorption peaks shifted to the NIR region upon doping with acids. The ease of the synthesis of the starting polyketone and of the modifications allows large-scale preparation of those conjugated polymers.
Magnetic Resonance in Chemistry | 2000
Eric R. Johnston; Robin Fortt; James C. Barborak
Dynamic two‐dimensional 1H and 13C NMR studies of the conformationally restricted amide N‐(1‐naphthoyl)‐cis‐2,6‐dimethylpiperidine reveal correlated rotation about the aryl–CO and amide bonds. The naphthalene and piperidine rings are tightly meshed and their rotation is virtually entirely (>99%) concerted, as evidenced by separate NMR measurement of the much slower rates of rotation about the individual aryl–CO and amide bonds. A disrotatory cogwheeling mechanism for the concerted rotation is proposed. Copyright
Journal of the American Chemical Society | 1992
Maurice Brookhart; Francis C. Rix; Joseph M. DeSimone; James C. Barborak
Journal of the American Chemical Society | 1966
James C. Barborak; L. Watts; R. Pettit
Journal of the American Chemical Society | 1971
Paul von Ragué Schleyer; James C. Barborak; Tah Mun Su; Gernot Boche; G. Schneider
Journal of the American Chemical Society | 1967
James C. Barborak; R. Pettit
Journal of Organic Chemistry | 1979
James C. Barborak; Diana Khoury; Wilhelm F. Maier; Paul von Ragué Schleyer; Edward C. R. Smith; William F. Smith; Christopher Wyrick
Journal of the American Chemical Society | 1995
Malcolm D. E. Forbes; Shiyamalie R. Ruberu; Dana Nachtigallova; Kenneth D. Jordan; James C. Barborak
Journal of the American Chemical Society | 1969
James C. Barborak; J. Daub; D. M. Follweiler; P. Von Rague Schleyer
Dalton Transactions | 2009
Francis C. Rix; Michael J. Rachita; Mark I. Wagner; Maurice Brookhart; Barbara Milani; James C. Barborak