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14 The crystal structure was solved by direct methods and refined by full-
2
matrix least-squares on F for all data using SHELXTL software. The
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4657.
4
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Owing to its directionality and specificity, hydrogen bonds play an
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20 Crystallographic data of 3a and 7c have been deposited with the CCDC
with numbers 691283 and 691284, respectively. Data were collected
at T = 293 K on SMART APEX CCD. 3a: A colorless needle,
approximate size 0.19 ¥ 0.05 ¥ 0.01 mm, was used for data collection.
9
1
0 (a) K. Tanaka, T. Furuta, K. Fuji, Y. Miwa and N. Taga, Tetrahedron:
Asymmetry, 1996, 7, 2199; (b) K. Tsubaki, M. Miura, H. Morikawa,
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Chem. Soc., 2003, 125, 16200; (c) P. K. Baruah, R. Gonnade, P. R.
Rajamohanan, H.-J. Hofmann and G. J. Sanjayan, J. Org. Chem., 2007,
C
25
H
20
N
2
O
7
, M = 460.43, orthorhombic, Pna2
1
, a = 27.786(2), b =
4.5194(8), c = 17.0553(4) A˚ , V = 2141.7(4) A˚ , Z = 4, D
3
= 1.428 g/cm ,
3
c
-1
m(MoKa) = 0.106 mm , 16929 reflections measured, 3772 unique [I >
2s (I)], R value 0.0350, wR2 = 0.0751. 7c: A colourless needle, of
approximate size 0.11 ¥ 0.08 ¥ 0.03 mm, was used for data collection.
¯
7
2, 5077.
1 H.-P. Yi, C. Li, J.-Li. Hou, X.-K. Jiang and Z.-T. Li, Tetrahedron, 2005,
1, 7974.
C
25
H
22
N
2
O
5
·CHCl
3
, M = 549.81, triclinic, P1, a = 10.1275(13), b =
1
1
10.7976(14), c = 11.7307(14) A˚ , a = 96.883(3), b = 94.267(3), g =
◦
-
3
3
6
90.920(3) , V = 1269.6(3) A˚ , Z = 2, D = 1.438 g/cm , m(MoKa) =
c
1
2 Naphthalene- and anthracene-based oligomers with iminodicarbonyl
linkers have been reported. See: H. Masu, I. Mizutani, T. Kato, I.
0.402 mm , 8097 reflections measured, 2861 unique [I > 2s (I)], R
value 0.0607, wR2 = 0.1060.
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Org. Biomol. Chem., 2009, 7, 2458–2465 | 2465