Newsletter

search results

results of search on CRYSTALLOGRAPHY JOURNALS ONLINE

33 citations found for Hosomi,

Search for Hosomi, in the World Directory of Crystallographers

Select bibliographic records for downloading using the checkboxes or select all button

Results 1 to 20, sorted by name:


Download citation
Download citation

link to html
Crystal structures of eleven 2,4,6-triisopropylbenzophenones have been determined to show that the molecular structures are essentially the same, independent of the substituted groups. The photostability of 4'-COOMe and 4'-COCl derivatives in the solid state is attributed to the narrow reaction cavity around the triisopropylphenylcarbonyl moiety.


Download citation
Download citation

link to html
The title compound is a polymorph (Z = 2, space group P1) of the orthorhombic form reported by Toda, Tanaka, Miyamoto, Koshima, Miyahara & Hirotsu [J. Chem. Soc. Perkin Trans. 2 (1997), pp. 1877-1885]. There is an intramolecular O-H...O hydrogen bond in each molecule, with the second hydroxy group free and not participating in hydrogen bonding.

Download citation
Download citation

link to html
The crystal structure of 2-pyridinecarboxylic acid was redetermined to confirm the space group C2/c. However, a solid-state high resolution 15N CP-MAS NMR study indicated that neutral molecules and zwitterions are arranged alternately within local non-centrosymmetric domains.

Download citation
Download citation

link to html
In the title adduct, fumaric acid has a centre of symmetry and is connected to two trans-cinnam­amide mol­ecules through cyclic hydrogen bonds. A single-crystal photoirradiation promoted the conformational disorder of the fumaric acid.

Download citation
Download citation

link to html
The absolute configuration was determined for the title compound, which was prepared in a synthetic study on the natural products bryostatins. There are two independent mol­ecules which show similar conformations, except for the orientation of the methoxy groups.

Download citation
Download citation

link to html
Single-crystal photoirradiations of trans-cinnamamide and the 4-methyl and 4-chloro derivatives have been carried out to observe the transformation from a pair of monomers related by a center of symmetry into an [alpha]-type dimer. The lower photoreactivity of trans-cinnamamide than those of the other two is not only due to a longer C...C distance between the nearest neighboring C=C double bonds, but also due to partial breakdown of the hydrogen-bond network in the process of photodimerization.

Download citation
Download citation

link to html
The crystal structures of the two title thio­benz­amides, i.e. (I) and (II), were determined to investigate the relationship between the photoreactivity in solid state and the structure. Their geometry was confirmed to be the E isomer in each case.

Download citation
Download citation

link to html
In the two title adducts, (I) and (II), respectively, hydrogen bonds between the di­ammonium and carboxyl­ate ions form a two-dimensional network parallel to the ab plane in (I) and one-dimensional chains along the c axis in (II). The cyclohexanedi­ammonium ion in (II) has a crystallographic twofold axis.

Download citation
Download citation

link to html
In the two title adducts, (I) and (II), respectively, the di­carboxyl­ic acid is connected to two cinnam­amide mol­ecules through cyclic hydrogen bonds. The arrangement of the C=C bonds of neighbouring cinnam­amide mol­ecules is twisted.

Download citation
Download citation

link to html
The absolute configuration was determined for the optically active title compound, which was prepared in a synthetic study on the natural products bryostatins.

Download citation
Download citation

link to html
In the four title compounds, (I)-(IV), respectively, the donor and acceptor mol­ecules are stacked alternately to form one-dimensional columns, but with different relative orientations of the alkyl substituents and thenitro groups.

Download citation
Download citation

link to html
The crystal structures of diammonium fumarate, 2NH4+.C4H2O42-, (I) and bis(isopropylammonium) fumarate, 2C3H7NH3+.C4H2O42-, (II), have been determined. The intermolecular N-H...O hydrogen bonds form a three-dimensional network in (I), whereas two-dimensional sheets are formed in (II) and separated by layers of isopropyl groups. The N...O distances are 2.790 (1)-2.903 (1) Å in (I) and 2.747 (1)-2.807 (1) Å in (II). Differences between the solid-state photoreactivities of the fumaric acid ions in (I) and (II) are rationalized based on the crystal structures.

Download citation
Download citation

link to html
The crystal structure of the title thio­benz­amide was determined to investigate the relationship between the photoreactivity in solid state and the structure. The geometry was confirmed to be the Z isomer.

Download citation
Download citation

link to html
In crystals of the title compound, the hydrogen fumarate anions form one-dimensional chains through O-H...O hydrogen bonding along the c and (a+b)/2 directions. There are three sites of the hydrogen fumarate, two of which have an inversion centre.

Download citation
Download citation

link to html
In the title two-component crystal, the tetracyanobenzene (TCNB) molecule has a crystallographic center of symmetry, and is sandwiched by 2-methylbenzylcyanide (MeBzCN) molecules. The absence of photochemical reactivity in the solid state may be attributed to the absence of a short contact between the benzyl H atoms of MeBzCN and the cyano N atoms of TCNB, the shortest distance being 3.45 (1) Å within the sandwich.

Download citation
Download citation

link to html
In the title adduct, a hydrogen-bonded unit of the acid and two cinnam­amide mol­ecules has a crystallographic twofold axis parallel to b, and the acid molecules are linked by cyclic hydrogen bonds to form a flat zigzag along c.

Download citation
Download citation

link to html
The title amide does not photocyclize in the solid state. The methoxy group is involved in intermolecular steric interactions and so prevents rotation of the N-phenyl group in the crystal.

Download citation
Download citation

link to html
In the two title compounds, (I) and (II), respectively, the donor and acceptor mol­ecules are stacked alternately to form one-dimensional columns, but with different relative orientations of the substituents on the donor andacceptor.

Download citation
Download citation

link to html
The title compound is the photoproduct obtained from N-iso­propyl-N-[(E)-2-phenyl­propenyl]­thio­benz­amide. Recrystallization showed a spontaneous resolution.

Follow IUCr Journals
Sign up for e-alerts
Follow IUCr on Twitter
Follow us on facebook
Sign up for RSS feeds