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Norbornadiene
About: Norbornadiene is a research topic. Over the lifetime, 2389 publications have been published within this topic receiving 38603 citations.
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54 citations
TL;DR: In this article, a stereoregular polymerization of poly(n-n-octyl-3-carbazoyl)acetylene (PNOCzA) was successfully performed with a [Rh(NBD)Cl]2 (NBD = norbornadiene) catalyst to afford poly(N-n, octyl, 3-carbazoyal)acetyl) as a new type of possible electron-transporting polymer in fairly high yields when triethylamine, chloroform, or dimethylformamide was used as
Abstract: Stereoregular polymerization of (N-n-octyl-3-carbazoyl)acetylene was successfully performed with a [Rh(NBD)Cl]2 (NBD = norbornadiene) catalyst to afford poly(N-n-octyl-3-carbazoyl)acetylene (PNOCzA) as a new type of possible electron-transporting polymer in fairly high yields when triethylamine, chloroform, or dimethylformamide was used as the polymerization solvent. The resulting polymers were composed of amorphous cis−transoid isomers bearing a yellow color or crystalline cis−transoid isomers having an orange color, called a columnar, as a π-conjugated molecular assembly at the solid state. The cis-to-trans isomorization of the yellow and orange polymers was induced by compression at 200 kg/cm2 under vacuum at room temperature for 10 min. The polymers obtained before and after compression were characterized in detail using 1H NMR, wide-angle X-ray diffraction, laser Raman, electron spin resonance, and diffuse reflective UV−vis (DRUV−vis) methods. The data showed that compression of the orange polymers r...
54 citations
TL;DR: The Ziegler catalyst TiCl 4 -Et 2 AlCl and the arenetitanium(II) complex (η6-C 6 H 6 )Ti(II)(AlCl 4 ) 2 induce [6 + 2]cycloaddition reactions of cycloheptatriene with dienes and acetylenes.
54 citations
TL;DR: The heptanuclear cluster Ba7 H7 [N(SiMe3 )2 ]7 is a very strong reducing agent that already at room temperature reacts with Me3 SiCH=CH2, norbornadiene, and ethylene and slowly decomposes to undefined barium hydride species.
Abstract: Reaction of Ba[N(SiMe3)2]2 with PhSiH3 in toluene gave simple access to the unique Ba hydride cluster Ba7H7[N(SiMe3)2]7 that can be described as a square pyramide spanned by five Ba2+ ions with two flanking BaH[N(SiMe3)2] units. This heptanuclear cluster is well soluble in aromatic solvents and the hydride 1H NMR signals and coupling pattern suggests that the structure is stable in solution. At 95 °C, no coalescence of hydride signals is observed but the cluster slowly decomposes to undefined Ba hydride species. Complex Ba7H7[N(SiMe3)2]7 is a very strong reducing agent that already at room temperature reacts with Me3SiCH=CH2, norbornadiene and ethylene. The highly reactive alkylbarium intermediates cannot be observed and deprotonate the (Me3Si)2Nˉ ion, as confirmed by the crystal structure of Ba14H12[N(SiMe3)2]12[(Me3Si)(Me2SiCH2)N]4.
54 citations
TL;DR: In this paper, the results for several norbornadiene quadricyclane conversions have been determined under various experimental conditions (Tab. 1) and interpreted in terms of a singlet intermediate of type 15.
Abstract: Quantum yields for several norbornadiene quadricyclane conversions have been determined under various experimental conditions (Tab. 1). The data are interpreted in terms of a singlet intermediate of type 15.
53 citations