113.0, 55.2; UV (CH2Cl2): lmax = 260.5 nm; fluorescence (CH2Cl2):
l = 388 nm; MS (FAB): m/z = 964.3; mp: 299–302 1C
z Crystallographic data for 3b: C58H44Br2O4, M = 964.79, mono-
clinic, a = 9.3964(5), b = 9.7344(5), c = 23.5694(8) A, a = 90, b =
91.8388(12), g = 901, V = 2154.7(2) A3, T = 120 K, space group
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686812.
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ꢀc
This journal is The Royal Society of Chemistry 2008
4818 | Chem. Commun., 2008, 4816–4818