ISSN:
1573-9171
Schlagwort(e):
5,7-diphenyI-7-methyl-4,7-dihydro-1,2,4-triazolo[1, 5-a]pyrimidine
;
molecular and crystal structure
;
X-ray structure investigation
;
conformational analysis
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract The molecular and crystal structures of 5,7-diphenyl-7-methyi-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidine have been studied by X-ray structural methods. The crystal is monoclinic,a=16.112(3),b=13.489(3),c=14.480(3)Å, β=101.62(2)°,Z=8, space groupC2/c,R=0.071. The presence of short intermolecular contacts indicates considerable steric strain in the molecule. The dihydropyrimidine ring exists in an unevenly planar boat conformation. Increasing the steric strain of the dihydrocycle leads to a twisted conformation.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00698996
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