π-Stacked dimers in 6-methoxy-3,3-dimethyl-3<i>H</i>-benzo[<i>f</i>]chromene, and centrosymmetric dimers containing C—H···π(arene) hydrogen bonds in racemic 3-bromo-2,2,6,6-tetramethyl-3,4-dihydro-2<i>H</i>,6<i>H</i>-1,5-dioxatriphenylene
Authors of publication
Silva, Fernando de C. da; Wardell, James L.; Wardell, Solange M. S. V.; Ferreira, Vitor F.; Low, John N.; Glidewell, Christopher
Journal of publication
Acta Crystallographica Section C
Year of publication
2007
Journal volume
63
Journal issue
10
Pages of publication
o568 - o571
a
6.3357 ± 0.0009 Å
b
15.523 ± 0.0002 Å
c
25.3654 ± 0.0006 Å
α
90°
β
90°
γ
90°
Cell volume
2494.7 ± 0.4 Å3
Cell temperature
120 ± 2 K
Ambient diffraction temperature
120 ± 2 K
Number of distinct elements
3
Space group number
61
Hermann-Mauguin space group symbol
P b c a
Hall space group symbol
-P 2ac 2ab
Residual factor for all reflections
0.065
Residual factor for significantly intense reflections
0.0397
Weighted residual factors for significantly intense reflections
0.0983
Weighted residual factors for all reflections included in the refinement
0.1079
Goodness-of-fit parameter for all reflections included in the refinement
