Unknown

Dataset Information

0

Polymorphism and phase transition behavior of 6,6'-bis(chloromethyl)-1,1',4,4'-tetramethyl-3,3'-(p-phenylenedimethylene)bis(piperazine-2,5-dione).

ABSTRACT: A crystallographic investigation of the title compound, C22H28Cl2N4O4, using crystals obtained under different crystallization conditions, revealed the presence of two distinct polymorphic forms. The molecular conformation in the two polymorphs is very different: one adopts a 'C' shape, whereas the other adopts an 'S' shape. In the latter, the molecule lies across a crystallographic twofold axis. The 'S'-shaped polymorph undergoes a reversible orthorhombic-to-monoclinic phase transition on cooling, whereas the structure of the 'C'-shaped polymorph is temperature insensitive.

SUBMITTER: Polaske NW 

PROVIDER: S-EPMC2720150 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

Polymorphism and phase transition behavior of 6,6'-bis(chloromethyl)-1,1',4,4'-tetramethyl-3,3'-(p-phenylenedimethylene)bis(piperazine-2,5-dione).

Polaske Nathan W NW   Nichol Gary S GS   Olenyuk Bogdan B  

Acta crystallographica. Section C, Crystal structure communications 20090709 Pt 8

A crystallographic investigation of the title compound, C22H28Cl2N4O4, using crystals obtained under different crystallization conditions, revealed the presence of two distinct polymorphic forms. The molecular conformation in the two polymorphs is very different: one adopts a 'C' shape, whereas the other adopts an 'S' shape. In the latter, the molecule lies across a crystallographic twofold axis. The 'S'-shaped polymorph undergoes a reversible orthorhombic-to-monoclinic phase transition on cooli  ...[more]

Similar Datasets

Unknown 6,6'-Diamino-1,1',3,3'-tetra-methyl-5,5'-(4-chloro-benzyl-idene)bis-[pyrimidine-2,4(1H,3H)-dione].
| S-EPMC2970351 | biostudies-literature
Unknown 1,4-Bis(3-methyl-phen-yl)piperazine-2,5-dione.
| S-EPMC3393927 | biostudies-literature
Unknown 1,1'-Bis(4-fluoro-phen-yl)-3,3'-diisobutyl-4,4'-diphen-oxy-1H,1'H-4,4'-bipyrazole-5,5'(4H,4'H)-dione.
| S-EPMC3089260 | biostudies-literature
Unknown 1,1'-Di-tert-butyl-2,2',3,3',4,4',5,5'-octa-ethyl-1,1'-bis-tannole.
| S-EPMC3152095 | biostudies-literature
Unknown Bis[?-4,4',6,6'-tetra-chloro-2,2'-(piperazine-1,4-diyldimethyl-ene)diphenolato]dicopper(II).
| S-EPMC2971750 | biostudies-literature
Unknown 3,3'-Bis(chloro-meth-yl)-4,4'-dieth-oxy-1,1'-biphen-yl.
| S-EPMC3998594 | biostudies-literature
Unknown Diammonium 1,1',3,3'-tetra-methyl-2,2',4,4',6,6'-hexa-oxoperhydro-5,5'-bipyrimidine-5,5'-diide monohydrate.
| S-EPMC2971361 | biostudies-literature
Unknown 2'-Iodo-2,2'',3,3'',4,4'',5,5'',6,6''-deca-methyl-1,1':3',1''-terphenyl chloro-form monosolvate.
| S-EPMC3050376 | biostudies-literature
Unknown 3,3'-Bis(quinolin-8-yl)-1,1'-[4,4'-methyl-enebis(4,1-phenyl-ene)]diurea.
| S-EPMC3254500 | biostudies-literature
Unknown Crystal structure of 4,4'-bis-(4-bromo-phen-yl)-1,1',3,3'-tetra-thia-fulvalene.
| S-EPMC6690463 | biostudies-literature