113 research outputs found
1-[BicycloÂ[4.2.0]octa-1(6),2,4-trien-3-yl]-3-(but-3-enÂyl)imidazolium bromide
In the title compound, C15H17N2
+·Br−, the cycloÂbutene and benzene rings are coplanar. The dihedral angle between the benzene and imidazolium rings is 21.2 (3)°. In the crystal structure, the C15H17N2
+ and Br− ions are linked into a zigzag chain along the b axis by C—H⋯Br hydrogen bonds, and weak C—H⋯π interÂactions involving the benzene ring of a screw-related cation
1-[Bicyclo[4.2.0]octa-1(6),2,4-trien-3-yl]-3-[bicyclo[4.2.0]octa-1(6),2,4-trien-3-ylÂmethyl]imidazolium hexaÂfluoroÂphosÂphate
In the title compound, C20H19N2
+·PF6
−, the two benzocycloÂbutene units are essentially planar and they form dihedral angles of 38.0 (2) and 72.7 (2)°, with the central imidazolium ring. In the crystal structure, weak C—H⋯π and Ï€-–π stacking interÂactions [centroid–centroid distance = 3.742 (2) Å] contribute to the stability of the crystal structure. The PF6
− ion is disordered over two positions with site occupancies of 0.869 (9) and 0.131 (9)
ChemInform Abstract: ACRYLAMID- UND N,N-DIMETHYLACRYLAMIDKOMPLEXE 2. MITT. N-PROTONIERUNG UND N-BINDUNG EINIGER UEBERGANGSMETALLPERCHLORATE UND -TETRAFLUOROBORATE
ChemInform Abstract: ACRYLAMID- UND N,N-DIMETHYLACRYLAMIDKOMPLEXE 1. MITT. N-KOORDINATION GEGENUEBER ZINN(IV)-HALOGENIDEN
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