(s, 1H), 12.490 (s, 1H), 10.301 (s, 1H), 9.259 (s, 1H),
8.021–8.008 (t, J = 5.2 Hz, 3H), 7.830–7.795 (d, J = 7.2 Hz,
1H), 7.753–7.717 (t, J = 7.2 Hz, 1H), 7.681–7.645 (t, J = 7.2
Hz, 1H), 7.614–7.577 (t, J = 7.2 Hz, 2H), 7.344–7.325 (d, J =
Acknowledgements
This study was supported by the Fundamental Research Funds
for the Central Universities (Lzujbky-2012-65) and (Lzujbky-
2012-213). Thanks to Hongbo Wei for NMR measurements and
Xuefei Zhao for DFT calculations.
7.6 Hz, 1H), 6.750–6.682 (q, J = 7.0 Hz, 3H), 6.617 (s, 1H). 13
C
NMR (DMSO-d6, 100 MHz, TMS) δ (ppm): 169.04, 163.19,
160.41, 160.06, 152.68, 151.64, 150.00, 144.69, 136.16, 132.79,
132.72, 130.69, 129.11, 128.15, 126.50, 125.18, 113.76, 110.00,
109.88, 106.21, 102.53, 82.87. MS (ESI): found: m/z = 479.3
(M + 1)+, calcd C28H18N2O6 = 478.12.
Notes and references
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Preparation of L1Cu. The acetonitrile solution of
CuCl2·2H2O (17 mg, 0.1 mmol) was added to the DMSO and
ethyl acetate solution of L1 (24 mg, 0.05 mmol), and a dark
brown precipitate was produced. Then the mixture was stirred at
room temperature for 5 hours. The dark brown solid that had
formed was filtered, washed with water 5 times, and dried under
vacuum. MS (ESI): found: m/z = 574.3 (L1 + Cu2+ + Cl−
−
2H)−. Elemental analysis: Found (calculated) (%) for
C28H17N2O6CuCl: C, 57.88 (58.34); H, 3.42 (2.97); N, 4.56
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X-Ray crystallography of L1
X-Ray structure determinations: single crystal X ray diffraction
measurements were carried out on a Bruker SMA RT 1000 CCD
diffractometer operating at 50 kV and 30 mA using Mo-Kα radi-
ation (λ = 0.71073 Å). The selected crystal was mounted in-side
a Lindemann glass capillary for data collection using the
SMART and SAINT software. An empirical absorption correc-
tion was applied using the SADABS program. All the structure
were solved by direct methods and refined by full-matrix least
squares on F2 using the SHELXTL 97 program package.18 All
non-hydrogen atoms were subjected to anisotropic refinement,
and all hydrogen atoms were added in idealized positions and
refined isotropically. Crystal data for L1 (containing CH3OH):
ˉ
Mr = 510.49, yellow, block, triclinic, space group P1, a = 7.837
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Crystal Structures, University of Göttingen, Göttingen, Germany, 1997.
(4) Å, b = 12.342(6) Å, c = 13.048(7) Å, α = 108.194(5), β =
90.845(6), γ = 90.795(6), V = 1198.7(11) Å3, Z = 2 (Table 1,
ESI†). CCDC 854854 contains the supplementary crystallo-
graphic data for this paper†.
5804 | Dalton Trans., 2012, 41, 5799–5804
This journal is © The Royal Society of Chemistry 2012