Results 291 to 300 of about 1,835,423 (352)

Photochemical Single-Crystal-to-Single-Crystal Transformations

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1998
Abstract Single-crystal-to-single-crystal reactions of a series of (E)-2,6-di-tert−butyl-4-[2-(4-methylphenyl)-ethenyl]pyrylium salts have been investigated using long wavelength irradiation conditions. The dimerization of the reactive olefins in the solid state was followed by X-ray crystallography.
Buchholz, V., Enkelmann, V.
openaire   +2 more sources

Topochemical single-crystal-to-single-crystal photodimerization

Chemical Physics Letters, 1980
Abstract The topochemical and topotactic solid-state photodimerization of 2-benzyl-5-benzylidenecyclopentanone is shown to be single-crystal-to-single-crystal, with the cell parameters of the monomer and dimer being very nearly identical (the maximum change being a contraction of 0.7% along c).
Hachiro Nakanishi   +2 more
openaire   +1 more source

Photochemical Single-Crystal-To-Single-Crystal Dimerizations and Polymerizations

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 2001
Abstract Single-crystal-to-single-crystal reactions of a series of bifunctional styrylyl]pyrylium salts have been investigated using long wavelength irradiation conditions. The dimerization of the reactive olefins in the solid state was followed by X-ray crystallography.
Buchholz, V., Enkelmann, V.
openaire   +2 more sources

Reversible single-crystal to single-crystal transformation between triangular single-molecule toroics

Dalton Transactions, 2023
Single-crystal to single-crystal transformation by solvent exchange provides a new way to study magneto-structural relationships in single-molecule magnets.
Lixi Feng   +7 more
openaire   +2 more sources

Single-Crystal-to-Single-Crystal Topochemical Polymerizations by Design

Accounts of Chemical Research, 2008
The polymerization of simple conjugated dienes has long been of interest: polydienes occur throughout Nature, and polyisoprene and its analogues form the basis of entire industries. In contrast, the polymers of similar small conjugated compounds, diacetylenes, trienes, and triacetylenes, are either unknown or laboratory curiosities.
Joseph W, Lauher   +2 more
openaire   +2 more sources

Single‐chain single crystals

Macromolecular Symposia, 1997
AbstractSingle‐chain single crystals of isotactic polystyrene and poly(ethylene oxide) were studied by using transmission electron microscopy, high resolution electron microscopy, electron diffraction. Single‐chain single crystals were prepared by spreading a dilute solution of polymers on a water surface and collecting the resulting single‐chain ...
Jie Cao   +5 more
openaire   +1 more source

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