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|Title: ||STRUCTURE OF A 4-PHENYLCOUMARIN DERIVATIVE|
|Authors: ||DAS, K|
|Issue Date: ||1991|
|Publisher: ||MUNKSGAARD INT PUBL LTD|
|Citation: ||ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 47(), 1922-1925|
|Abstract: ||9-Hydroxy-6,7-trans-dimethyl-4-phenyl-6,7-dihydro-2H,8H-benzo[1,2-b:3,4-b']dipyran-2,8-dione, C20H16O5, m.p. = 512.513 K, M(r) = 336.34, triclinic, P1BAR, a = 8.414 (3), b = 9.929 (4), c = 10.358 (2) angstrom, alpha = 96.77 (3), beta = 105.08 (2), gamma = 99.47 (3)-degrees, V = 812.39 angstrom 3, Z = 2, D(x) = 1.363 Mg m-3, lambda(Mo K-alpha) = 0.71069 angstrom, mu(Mo K-alpha) = 0.059 mm-1, F(000) = 352, T = 295 K, final R = 0.062, wR = 0.072, for 2133 observed reflections. The crystal contains two isomers in approximately 60:40 proportions. Atoms C(6), C(7) and their attached H atoms occupy alternative positions in two isomers. H(6)/H(6') and H(7)/H(7') are trans to each other.|
|Appears in Collections:||Article|
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