Acta Cryst. (2008). E64, o1910  [ doi:10.1107/S1600536808028250 ]

7,7'-(3,3'-Dibenzyl-3H,3'H-4,4'-bi-1,2,3-triazole-5,5'-diyl)bis(4-methyl-2H-chromen-2-one)

J. A. Key, C. W. Cairo and M. J. Ferguson

Abstract: The title compound, a bis-5,5'-triazole, C₃₈H₂₈N₆O₄, was observed as a side-product from the Sharpless-Meldal click reaction of the corresponding coumarin alkyne and benzylazide. Although the compound was present as a minor component, it crystallized in preference to the major product. The two triazole rings are almost orthogonal to each other [dihedral angle = 83.8 (1)°]. However the 4 and 4' coumarin systems are close to coplanar with their respective triazole rings [23.6 (1) and 15.1 (1)°]. Each of the benzene rings packs approximately face-to-face with the opposing coumarin ring systems, with interplanar angles of 7.7 (1) and 25.3 (1)° and distances of 3.567 (2) and 3.929 (2) Å between the respective centroids of the opposing rings.

Online 13 September 2008

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