The copotymerizations of p-diethynyibenzene(PDEB)with phenytacetylene(PHA),4,4’-diethynytbiphenyt(DEBP)or m-diethynylbenzene(MDEB)are studied in various mole ratios of
(MeCp)<sub>2</sub>ZrCl(&-C<sub>10</sub>H<sub>7</sub>COO)has five-coordinate bentzirconocene in which the-naphthoyloxyis a bidentate ligand(Zr-O 2.317(2),2.260(2)(?);Zr-C
A New steroidal saponin was isolated from the rhizomes of Smilax lebrunii. On the basis of spectral and chemical methods, its structure was elucidated as:(25S)s
The SmF<sub>2.01</sub>was synthesized by reducing SmF<sub>3</sub> in H<sub>2</sub> stream.As it was doped inKM<sub>g</sub>F<sub>3</sub> and KCaF<sub>3</sub>.the
ESR measurements using spin trapping technique werecarried out for β-carotene-halobenzene system under UV lightirradiation.The ESR spectra observed in the pres
Four new sesquiterpenes were isolated from the roots of Ligularia virgaurea, and identified as furanomexicanane-9-ene-8-one(1), 9β, 10β-epoxyfuranomexicanane-