We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
In situ crystallization of the linear alkynes C<sub> n</sub> H<sub>2</sub> n-<sub>2</sub> ( n=7, 8, 9, 10).
- Authors
Bond, Andrew D.; Davies, John E.
- Abstract
A manual in situ crystallization technique is described, for application on a κ-geometry area-detector instrument. The technique has been applied to grow crystals of some linear alkynes: 1-heptyne, 1-octyne, 1-nonyne and 1-decyne, C n H2 n-2 ( n=7, 8, 9, 10). The structures with odd n (1-heptyne and 1-nonyne) crystallize in space group Pca21. The structures with even n (1-octyne and 1-decyne) crystallize in space group P21/ c, with two molecules in the asymmetric unit ( Z′=2) and an approximately orthorhombic metric. All of the structures contain layers of molecules with a square unit mesh of dimensions 5.7×7.2 Å, identical to the layers present in the previously published structures of 1,7-octadiyne and 1,9-decadiyne. The structures differ where the methyl groups meet, giving systematically greater packing efficiency for 1-heptyne and 1-nonyne, compared to 1-octyne and 1-decyne. This systematic alternation in crystal density is correlated with an alternation in melting points.
- Subjects
CRYSTALLIZATION; HYDROCARBONS spectra; ALKYNES; METHYL groups spectra; SPACE groups; MELTING points; CRYSTAL structure
- Publication
Zeitschrift für Kristallographie. Crystalline Materials, 2014, Vol 229, Issue 9, p661
- ISSN
2194-4946
- Publication type
Article
- DOI
10.1515/zkri-2014-1731