Results 241 to 250 of about 11,791 (282)

Spiro-compounds, synthesis and catalytic dehydrogenation of substituted spiro[5,5] undecanes

Tetrahedron, 1976
Abstract Catalytic dehydrogenation of 1-propyl-8,9-benzospiro[5,5]undecane-7-ol (5: R = H), and 1-propyl-3′-methyl-8,9-benzospiro[5,5]undecane-7-ol (5: R = Me) has been carried out to study the effect of a bulky alkyl group on the ring in the ring transformation of the spiro[5,5]undecane system. The catalytic dehydrogenation of the spiro-compound 5(R
A. Mitra, M. Dutta Gupta
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Enantioselective synthesis of oxa-spiro compounds

Tetrahedron Letters, 1989
Abstract Optically active compound 10b, efficiently prepared from imine 8b, was transformed into oxa-spiro derivatives 15 and 16 .
Didier Desmaële, Jean d'Angelo
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Ultrafast optical dynamics of spiro-compounds

Synthetic Metals, 2001
We report on time-resolved measurements of spiro-type molecules in the ps- and fs-timescale. Due to the orthogonality of the transition dipoles of two identical moieties connected through a spiro-atom, one expects these compounds to show two perpendicular, degenerate states that may enter into a complex free evolution upon fs excitation.
Milota, Franz, Warmuth, Christian, Tortschanoff, Andreas, Sperling, Jaroslaw, Fuhrmann, Thomas, Salbeck, Josef, Kauffmann, Harald   +6 more
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Electronic properties of spiro compounds for organic electronics

The Journal of Chemical Physics, 2012
The electronic properties of p-type, n-type, and ambipolar spiro materials have been investigated using a combination of photoemission spectroscopy, electron energy-loss spectroscopy, and density functional based calculations. Our results provide insight into the occupied density of states as well as the electronic excitation spectra.
Benjamin, Mahns, Friedrich, Roth, Mandy, Grobosch, Susi, Lindner, Martin, Knupfer, Tobat P I, Saragi, Thomas, Reichert, Josef, Salbeck, Torsten, Hahn   +8 more
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Phosphorus−Nitrogen Compounds. Part 13. Syntheses, Crystal Structures, Spectroscopic, Stereogenic, and Anisochronic Properties of Novel Spiro-Ansa-Spiro-, Spiro-Bino-Spiro-, and Spiro-Crypta Phosphazene Derivatives

Inorganic Chemistry, 2006
The condensation reactions of N2Ox (x = 2, 3) donor-type aminopodand (4) and dibenzo-diaza-crown ethers (5, 6, and 9) with hexachlorocyclotriphosphazatriene, N3P3Cl6, produce two kinds of partially substituted novel phosphazene derivatives, namely, spiro-bino-spiro- (19) and spiro-crypta (21, 22, and 25) phosphazenes.
Selen, Bilge, Semsay, Demiriz, Aytug, Okumus, Zeynel, Kiliç, Baris, Tercan, Tuncer, Hökelek, Orhan, Büyükgüngör   +6 more
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Enantioselective methodologies for the synthesis of spiro compounds

Chem. Soc. Rev., 2012
The enantioselective synthesis of spirocycles has been a long time pursued dream for organic chemists. Since the first pioneering efforts of Tamao and coworkers in the enantioselective construction of spirosilanes, many efforts have been devoted to the development of new and promising asymmetric methodologies.
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Lessons learned from spiro-OMeTAD and PTAA in perovskite solar cells

Energy and Environmental Science, 2021
Florine M Rombach, Saif A Haque, Thomas J Macdonald   +2 more
exaly  

Spiro Compounds

2022
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Large-area perovskite solar cells employing spiro-Naph hole transport material

Nature Photonics, 2022
Mingyu Jeong, In Woo Choi, Seonghun Jeong   +2 more
exaly  

Spiro-salen catalysts enable the chemical synthesis of stereoregular polyhydroxyalkanoates

Nature Catalysis, 2023
, Zhongzheng Cai, Jian-Bo Zhu
exaly