organic compounds
1
2
C11±C16 rings in the molecules at (x, y, z) and (2 � x, + y,
Table 1
Hydrogen-bond geometry (A, ).
Ê
ꢀ
3
2
�
z), respectively, are components of the chains of rings
3
1
3
3
generated by the 2 screw axes along ( , y, ) and ( , y, ).
1
2
4
2
4
DÐHÁ Á ÁA
DÐH
HÁ Á ÁA
DÁ Á ÁA
DÐHÁ Á ÁA
ꢀ
These two rings make a dihedral angle of 12.7 (2) , but their
Ê
ring-centroid separation of 3.770 (3) A and interplanar
Ê
separation of ca 3.6 A suggest a structurally signi®cant inter-
action, the effect of which is to link [010] chains into (001)
sheets. This linking of [010] chains is reinforced by an attrac-
tive dipolar interaction involving the two carbonyl groups. The
C1ÐO1 carbonyl group in the molecule at (x, y, z), which
forms part of the chain along ( , y, ), forms a type III sheared-
parallel interaction (Allen et al., 1998) with the C2ÐO2
i
C6ÐH6Á Á ÁO52
0.95
0.95
2.52
2.50
3.294 (6)
3.118 (7)
139
123
ii
C7ÐH7Á Á ÁO51
1
2
3
2
Symmetry codes: (i) � x 1; y � ; � z ; (ii) x; y � 1; z.
Re®nement
2
2
2
o
2
Re®nement on F
2
w = 1/[ꢄ (F
) + (0.0641P)
2
R[F > 2ꢄ(F )] = 0.068
wR(F ) = 0.171
S = 1.09
+ 1.6397P]
where P = (F + 2F )/3
o c
1
3
2
2
2
2
4
(Á/ꢄ)max < 0.001
Ê
� 3
1
554 re¯ections
181 parameters
H-atom parameters constrained
Áꢅmax = 0.39 e A
1
3
Áꢅmin = � 0.25 e AÊ �
3
carbonyl group in the molecule at (2 � x, � + y, � z), part
2
2
3
3
i
of the chain along ( , y, ). The O1Á Á ÁC2 distance is
2
4
i
i
i
Ê
2
are 118.5 (3) and 107.0 (2) , respectively [symmetry code: (i)
.957 (5) A, and the C1ÐO1Á Á ÁC2 and O1Á Á ÁC2 ÐO2 angles
All H atoms were located from difference maps and then treated
Ê
as riding atoms [CÐH = 0.95 A and Uiso(H) = 1.2Ueq(C)]. In the
ꢀ
1
2
3
2
2
� x, � + y, � z]. It may be noted here that, although the
absence of signi®cant anomalous dispersion, the Flack parameter
(Flack, 1983) was inconclusive (Flack & Bernardinelli, 2000). Hence,
the Friedel-equivalent re¯ections were merged prior to the ®nal
re®nement and it was not possible to determine the absolute
con®guration of the molecules in the crystal used for the data
collection. However, this con®guration has no chemical signi®cance.
Data collection: COLLECT (Hooft, 1999); cell re®nement and
carbonyl O atoms participate in both of the short intra-
molecular contacts and in the intermolecular dipolar inter-
actions, they play no part at all in the intermolecular hydrogen
bonding.
Two (010) sheets pass through each unit cell, generated by
1
3
21
speci®c interactions between adjacent sheets.
screw axes at z = and z = , but there are no direction-
4 4
data reduction: DENZO (Otwinowski
& Minor, 1997) and
COLLECT; structure solution: OSCAIL (McArdle, 2003) and
SHELXS97 (Sheldrick, 1997); structure re®nement: OSCAIL and
SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek,
It is of interest to compare brie¯y the supramolecular
structure of (I) with those of isomeric compounds having the
nitro substituent in the N-phenyl ring. In N-(2-nitro-
2003); software used to prepare material for publication: SHELXL97
and PRPKAPPA (Ferguson, 1999).
phenyl)phthalimide (Voliotis et al., 1984), pairs of molecules
2
are linked by a single CÐHÁ Á ÁO hydrogen bond into R (14)
2
dimers, which are themselves linked into ꢀ-stacked chains,
while in N-(3-nitrophenyl)phthalimide (Glidewell et al., 2004),
the molecules are linked into a three-dimensional framework
utilizing four independent CÐHÁ Á ÁO hydrogen bonds.
The X-ray data were collected at the EPSRC X-ray Crys-
tallographic Service, University of Southampton, England; the
authors thank the staff for all their help and advice. JNL
thanks NCR Self-Service, Dundee, for grants which have
provided computing facilities for this work. JLW thanks CNPq
and FAPERJ for ®nancial support.
Experimental
2
Awell ground mixture of PhNH (0.19 g, 2 mmol) and 4-nitrophthalic
Supplementary data for this paper are available from the IUCr electronic
archives (Reference: SK1814). Services for accessing these data are
described at the back of the journal.
anhydride (0.38 g, 2 mmol) was carefully heated at 473 K until
effervescence (water evolution) ceased. To the cooled solid residue
was added chloroform (10 ml) and activated charcoal. The resulting
mixture was heated to re¯ux, ®ltered, and the ®ltrate evaporated. The
residue was recrystallized from ethanol to provide compound (I).
References
Allen, F. H., Baalham, C. A., Lommerse, J. P. M. & Raithby, P. R. (1998). Acta
Cryst. B54, 320±329.
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem.
Int. Ed. Engl. 34, 1555±1573.
Ferguson, G. (1999). PRPKAPPA. University of Guelph, Canada.
Flack, H. D. (1983). Acta Cryst. A39, 876±881.
Flack, H. D. & Bernardinelli, G. (2000). J. Appl. Cryst. 33, 1143±1148.
Glidewell, C., Low, J. N., Skakle, J. M. S. & Wardell, J. L. (2004). Acta Cryst.
C60, o24±o27.
Hooft, R. W. W. (1999). COLLECT. Nonius BV, Delft, The Netherlands.
McArdle, P. (2003). OSCAIL for Windows. Version 10. Crystallography
Centre, Chemistry Department, NUI Galway, Ireland.
Otwinowski, Z. & Minor, W. (1997). Methods in Enzymology, Vol. 276,
Macromolecular Crystallography, Part A, edited by C. W. Carter Jr & R. M.
Sweet, pp. 307±326. New York: Academic Press.
Sheldrick, G. M. (1997). SHELXS97 and SHELXL97. University of
G oÈ ttingen, Germany.
Sheldrick, G. M. (2003). SADABS. Version 2.10. University of G oÈ ttingen,
Germany.
Spek, A. L. (2003). J. Appl. Cryst. 36, 7±13.
Crystal data
C
14
H
8
N
2
O
4
Mo Kꢁ radiation
Cell parameters from 1554
re¯ections
r
M = 268.22
Orthorhombic, P2 2 2
1
1
1
Ê
a = 11.9288 (6) A
ꢀ
ꢂ = 2.9±27.6
ꢃ = 0.12 mm
T = 120 (2) K
Ê
b = 7.0604 (2) A
� 1
Ê
c = 13.8337 (7) A
Ê
V = 1165.10 (9) A
Z = 4
3
Needle, yellow
0.12 Â 0.04 Â 0.03 mm
�
3
D
x
= 1.529 Mg m
Data collection
Nonius KappaCCD area-detector
diffractometer
1554 independent re¯ections
1318 re¯ections with I > 2ꢄ(I)
'
and ! scans
Absorption correction: multi-scan
SADABS; Sheldrick, 2003)
min = 0.963, Tmax = 0.997
3 798 measured re¯ections
Rint = 0.070
ꢀ
ꢂ
max = 27.6
(
T
h = � 15 ! 13
k = � 9 ! 9
1
l = � 17 ! 17
Voliotis, S., Arrieta, J. M. & Germain, G. (1984). Acta Cryst. C40, 1946±1948.
ꢁ
o210 Glidewell et al.
C H N
14 8 2
O
4
Acta Cryst. (2005). C61, o209±o210