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17. The details on the experimental procedures and the spectroscopic data of the
synthesized compounds are available in the supporting information.
18. CCDC 843782 for compound 4c. The single-crystal growth was carried out in
N,N-dimethylformamide at room temperature. X-ray crystallographic analysis
was performed with a Siemens SMART CCD and a Semens P4 diffractometer.
Crystal data for 4c: C22H20BrN3O3S, yellow, crystal dimension 0.31 Â 0.13 Â
0.07 mm, triclinic, space group P-1, a = 5.6549(6) Å, b = 11.2821(14) Å,
c = 17.5553(18) Å,
a
= 82.760(2)°, b = 86.367(2)o,
c
= 75.5730(10)o, V =
1075.5(2) Å3, Mr = 486.38, Z = 2, Dc = 1.502 g/cm3, k = 0.71073 Å,
l (Mo
K ) = 2.037 mm-1, F(000) = 496, R1 = 0.1440, wR2 = 0.2452.
a