organic papers
o396
Sonaret al. C15H17NO2 doi:10.1107/S1600536805042637 Acta Cryst.(2006). E62, o396–o397
Acta Crystallographica Section E Structure Reports Online
ISSN 1600-5368
(
Z
)-2-(4-Methoxybenzylidene)-1-azabicyclo[2.2.2]-octan-3-one
Vijayakumar N. Sonar,aSean Parkinband Peter A. Crooksa*
a
Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA, andbDepartment of
Chemistry, University of Kentucky, Lexington, KY 40506, USA
Correspondence e-mail: pcrooks@uky.edu
Key indicators
Single-crystal X-ray study
T= 90 K
Mean(C–C) = 0.003 A˚
Rfactor = 0.034
wRfactor = 0.077
Data-to-parameter ratio = 10.1
For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
#2006 International Union of Crystallography Printed in Great Britain – all rights reserved
The title compound, C15H17NO2, was prepared by the base-catalyzed reaction of 4-methoxybenzaldehyde with 1-aza-bicyclo[2.2.2]octan-3-one. The configuration about the olefinic
bond connecting the methoxyphenyl and
1-aza-bicylo[2.2.2]octan-3-one moieties isZ.
Comment
The title compound, (I), was prepared by the base-catalyzed
condensation of 4-methoxybenzaldehyde with
[image:1.610.251.411.384.479.2]1-aza-bicyclo[2.2.2]octan-3-one, to afford (I) as a single geometrical isomer. In order to confirm the double-bond geometry, and to determine how the molecular conformation in the crystal structure is affected by the position of the para-methoxy group, the X-ray analysis of this positional isomer has been carried out and the results are presented here. This is a companion study together with the previous communication on the isomeric 2-methoxy analogue (Sonaret al., 2006).
Fig. 1 illustrates an ellipsoid plot of (I), with the atom-numbering scheme; selected geometric parameters are listed in Table 1. The configuration about the olefinic bond connecting the 4-methoxyphenyl and 1-azabicylo[2.2.2]octan-3-one moieties is Z. The double bond has a nearly planar atomic arrangement, since the r.m.s. deviation from the mean plane passing through atoms N1, C8, C9, C7 and C1 for (I) is 0.0197 (11) A˚ .
There are no significant differences in the geometric para-meters of (Z
)-2-(2-methoxy-benzylidene)-1-azabicyclo[2.2.2]-octan-3-one and (Z
)-2-(4-methoxy-benzylidene)-1-azabicyclo[2.2.2]octan-3-one. This suggests that the position of the methoxy group does not have much influence on the overall molecular conformation in the 2- and 4-positional isomers.
Experimental
Compound (I) was prepared following the method described previously for the 2-methoxy analogue (Sonar et al., 2006), but utilizing 4-methoxybenzaldehyde in place of
benzaldehyde. Spectroscopic analysis: 1H NMR (CDCl3,, p.p.m.): 1.99–2.04 (td, 4H), 2.59–2.62 (p, 1H), 2.93–3.03 (m, 2H), 3.09–3.19 (m, 2H), 3.83 (s, 3H), 6.89 (dd, 2H),6.98 (s, 1H), 8.02 (dd, 2H);13C NMR (CDCl3,, p.p.m.): 26.4, 40.6, 47.8, 55.5, 114.1, 125.1, 127.0, 134.1, 143.0, 160.8, 206.4.
Crystal data
C15H17NO2
Mr= 243.30
Orthorhombic,P212121
a= 5.8425 (2) A˚
b= 9.9252 (3) A˚
c= 21.3739 (7) A˚
V= 1239.43 (7) A˚3
Z= 4
Dx= 1.304 Mg m
3
MoKradiation Cell parameters from 1641
reflections = 1.0–27.5
= 0.09 mm1
T= 90.0 (2) K Block, colourless 0.300.200.15 mm
Data collection
Nonius KappaCCD area-detector diffractometer
!scans
Absorption correction: multi-scan (SCALEPACK; Otwinowski & Minor, 1997)
Tmin= 0.975,Tmax= 0.987
10079 measured reflections
1664 independent reflections 1323 reflections withI> 2(I)
Rint= 0.031
max= 27.5
h=7!7
k=12!12
l=27!27
Refinement
Refinement onF2
R[F2> 2(F2)] = 0.034
wR(F2) = 0.077
S= 1.04 1664 reflections 165 parameters
H-atom parameters constrained
w= 1/[2(F
o2) + (0.0341P)2
+ 0.1346P]
whereP= (Fo2+ 2Fc2)/3
(/)max= 0.001 max= 0.20 e A˚
3 min=0.18 e A˚
3
Extinction correction:SHELXL97
(Sheldrick, 1997)
[image:2.610.44.297.70.207.2]Extinction coefficient: 0.013 (2)
Table 1
Selected geometric parameters (A˚ ,).
C1—C7 1.463 (2)
N1—C8 1.447 (2)
O1—C9 1.227 (2)
O2—C4 1.369 (2)
O2—C15 1.429 (2)
C7—C8 1.336 (2)
C8—C9 1.485 (2)
C9—C10 1.508 (3)
C2—C1—C7 123.56 (17)
C6—C1—C7 118.35 (17)
C4—O2—C15 117.91 (16)
C8—C7—C1 130.35 (17)
C7—C8—C9 121.39 (17)
N1—C8—C9 113.57 (15)
O1—C9—C8 124.48 (17)
C8—C9—C10 110.75 (15)
C15—O2—C4—C3 5.4 (3)
C2—C1—C7—C8 21.9 (3)
C6—C1—C7—C8 160.91 (19)
C7—C8—C9—O1 0.0 (3)
In the absence of significant anomalous dispersion effects, Friedel pairs were averaged. H atoms were positioned geometrically and treated as riding, with C—H distances in the range 0.95–0.99 A˚ and withUiso(H) = 1.2–1.5Ueq(C).
Data collection: COLLECT (Nonius, 1999); cell refinement: SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO-SMN (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXS97(Sheldrick, 1997); program(s) used to refine structure:SHELXL97(Sheldrick, 1997); molecular graphics: XP in SHELXTL/PC (Sheldrick, 1995); software used to prepare material for publication: SHELX97-2 (Sheldrick, 1997) and local procedures.
This investigation was supported by National Institute of Alcohol Abuse and Alcoholism Grant AA12600.
References
Nonius (1999).COLLECT. Nonius, BV, Delft, The Netherlands.
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 (1995).XP in SHELXTL/PC. Siemens Analytical X-ray Instru-ments Inc., Madison, Wisconsin, USA.
Sheldrick, G. M. (1997). SHELXS97, SHELXL97 and SHELX97-2. University of Go¨ttingen, Germany.
Sonar, V. N., Parkin, S. & Crooks, P. A. (2006). Acta Cryst. E62, o393– o395.
Figure 1
[image:2.610.314.566.103.226.2]supporting information
sup-1
Acta Cryst. (2006). E62, o396–o397
supporting information
Acta Cryst. (2006). E62, o396–o397 [https://doi.org/10.1107/S1600536805042637]
(
Z
)-2-(4-Methoxybenzylidene)-1-azabicyclo[2.2.2]octan-3-one
Vijayakumar N. Sonar, Sean Parkin and Peter A. Crooks
(Z)-2-(4-Methoxybenzylidene)-1-azabicyclo[2.2.2]octan-3-one
Crystal data C15H17NO2 Mr = 243.30
Orthorhombic, P212121 Hall symbol: P 2ac 2ab a = 5.8425 (2) Å b = 9.9252 (3) Å c = 21.3739 (7) Å V = 1239.43 (7) Å3 Z = 4
F(000) = 520 Dx = 1.304 Mg m−3
Mo Kα radiation, λ = 0.71073 Å Cell parameters from 1641 reflections θ = 1.0–27.5°
µ = 0.09 mm−1 T = 90 K Block, colourless 0.30 × 0.20 × 0.15 mm
Data collection
Nonius KappaCCD area-detector diffractometer
Radiation source: fine-focus sealed tube Graphite monochromator
Detector resolution: 18 pixels mm-1 ω scans at fixed χ = 55°
Absorption correction: multi-scan
(SCALEPACK; Otwinowski & Minor, 1997) Tmin = 0.975, Tmax = 0.987
10079 measured reflections 1664 independent reflections 1323 reflections with I > 2σ(I) Rint = 0.031
θmax = 27.5°, θmin = 1.9° h = −7→7
k = −12→12 l = −27→27
Refinement Refinement on F2 Least-squares matrix: full R[F2 > 2σ(F2)] = 0.034 wR(F2) = 0.077 S = 1.04 1664 reflections 165 parameters 0 restraints
Primary atom site location: structure-invariant direct methods
Secondary atom site location: difference Fourier map
Hydrogen site location: inferred from neighbouring sites
H-atom parameters constrained w = 1/[σ2(Fo2) + (0.0341P)2 + 0.1346P]
where P = (Fo2 + 2Fc2)/3 (Δ/σ)max = 0.001
Δρmax = 0.20 e Å−3 Δρmin = −0.18 e Å−3
Special details
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.
Friedel pairs merged to conform to Acta editorial policy.
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)
x y z Uiso*/Ueq C1 0.1826 (3) 0.51863 (18) −0.10865 (8) 0.0178 (4) N1 −0.0833 (3) 0.59447 (15) 0.01274 (7) 0.0191 (4) O1 0.1324 (2) 0.26603 (12) 0.05619 (6) 0.0224 (3) C2 0.0222 (3) 0.61372 (18) −0.12871 (8) 0.0188 (4)
H2 −0.1043 0.6348 −0.1026 0.023*
O2 0.2694 (2) 0.70620 (14) −0.28129 (6) 0.0280 (4) C3 0.0442 (3) 0.67792 (19) −0.18603 (8) 0.0194 (4)
H3 −0.0676 0.7413 −0.1993 0.023*
C4 0.2310 (4) 0.6488 (2) −0.22402 (9) 0.0205 (5) C5 0.3924 (4) 0.55543 (19) −0.20484 (8) 0.0234 (5)
H5 0.5206 0.5364 −0.2307 0.028*
C6 0.3676 (4) 0.4897 (2) −0.14823 (8) 0.0210 (5)
H6 0.4773 0.4242 −0.1360 0.025*
C7 0.1624 (3) 0.44362 (18) −0.05000 (8) 0.0176 (4)
H7 0.2466 0.3618 −0.0486 0.021*
C8 0.0446 (3) 0.47176 (17) 0.00197 (8) 0.0175 (4) C9 0.0357 (3) 0.37575 (18) 0.05523 (9) 0.0183 (4) C10 −0.1118 (3) 0.43046 (19) 0.10727 (9) 0.0207 (4)
H10 −0.1203 0.3658 0.1431 0.025*
C11 −0.0051 (4) 0.56485 (18) 0.12762 (8) 0.0229 (5)
H11A 0.1501 0.5493 0.1448 0.027*
H11B −0.1000 0.6070 0.1606 0.027*
C12 0.0088 (4) 0.65929 (19) 0.06981 (8) 0.0222 (5)
H12A −0.0786 0.7427 0.0785 0.027*
H12B 0.1705 0.6848 0.0626 0.027*
C13 −0.3505 (4) 0.4588 (2) 0.08010 (9) 0.0236 (5)
H13A −0.4500 0.4985 0.1127 0.028*
H13B −0.4212 0.3736 0.0657 0.028*
C14 −0.3269 (3) 0.5581 (2) 0.02424 (9) 0.0228 (5)
H14A −0.3916 0.5162 −0.0139 0.027*
H14B −0.4155 0.6409 0.0332 0.027*
C15 0.0971 (4) 0.7933 (2) −0.30609 (9) 0.0253 (5)
H15A −0.0505 0.7464 −0.3063 0.038*
supporting information
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Acta Cryst. (2006). E62, o396–o397
H15C 0.0859 0.8744 −0.2801 0.038*
Atomic displacement parameters (Å2)
U11 U22 U33 U12 U13 U23
C1 0.0194 (10) 0.0157 (9) 0.0183 (10) −0.0036 (8) −0.0022 (8) −0.0029 (8) N1 0.0199 (9) 0.0174 (8) 0.0200 (9) 0.0022 (7) 0.0023 (7) −0.0011 (7) O1 0.0220 (7) 0.0176 (7) 0.0275 (8) 0.0007 (6) −0.0014 (6) 0.0016 (6) C2 0.0171 (10) 0.0185 (9) 0.0209 (11) −0.0008 (9) 0.0013 (8) −0.0044 (9) O2 0.0274 (8) 0.0338 (8) 0.0229 (8) 0.0068 (8) 0.0032 (7) 0.0084 (7) C3 0.0205 (10) 0.0169 (10) 0.0208 (11) 0.0021 (9) −0.0034 (9) −0.0010 (9) C4 0.0219 (10) 0.0212 (10) 0.0183 (10) −0.0015 (9) −0.0012 (8) 0.0004 (9) C5 0.0210 (10) 0.0283 (11) 0.0208 (10) 0.0051 (10) 0.0038 (9) 0.0002 (9) C6 0.0201 (10) 0.0197 (10) 0.0231 (11) 0.0044 (10) −0.0013 (9) −0.0010 (9) C7 0.0147 (9) 0.0144 (9) 0.0235 (10) 0.0004 (8) −0.0020 (8) −0.0006 (8) C8 0.0148 (9) 0.0153 (9) 0.0224 (11) −0.0004 (8) −0.0015 (8) −0.0012 (8) C9 0.0156 (9) 0.0167 (10) 0.0225 (11) −0.0036 (9) −0.0030 (9) −0.0001 (9) C10 0.0210 (10) 0.0217 (10) 0.0193 (10) −0.0012 (10) 0.0024 (9) 0.0029 (9) C11 0.0228 (11) 0.0255 (10) 0.0203 (10) 0.0056 (10) 0.0000 (9) −0.0038 (9) C12 0.0238 (11) 0.0182 (10) 0.0246 (11) −0.0023 (10) 0.0009 (9) −0.0035 (9) C13 0.0174 (10) 0.0240 (11) 0.0293 (11) −0.0008 (9) 0.0037 (9) 0.0012 (9) C14 0.0164 (10) 0.0243 (11) 0.0279 (11) 0.0009 (10) 0.0000 (9) 0.0030 (9) C15 0.0256 (11) 0.0257 (11) 0.0246 (11) 0.0034 (10) −0.0017 (10) 0.0032 (9)
Geometric parameters (Å, º)
C1—C2 1.397 (3) C8—C9 1.485 (2)
C1—C6 1.402 (3) C9—C10 1.508 (3)
C1—C7 1.463 (2) C10—C11 1.535 (3)
N1—C8 1.447 (2) C10—C13 1.537 (3)
N1—C12 1.480 (2) C10—H10 1.0000
N1—C14 1.488 (3) C11—C12 1.553 (3)
O1—C9 1.227 (2) C11—H11A 0.9900
C2—C3 1.387 (3) C11—H11B 0.9900
C2—H2 0.9500 C12—H12A 0.9900
O2—C4 1.369 (2) C12—H12B 0.9900
O2—C15 1.429 (2) C13—C14 1.554 (3)
C3—C4 1.390 (3) C13—H13A 0.9900
C3—H3 0.9500 C13—H13B 0.9900
C4—C5 1.384 (3) C14—H14A 0.9900
C5—C6 1.382 (3) C14—H14B 0.9900
C5—H5 0.9500 C15—H15A 0.9800
C6—H6 0.9500 C15—H15B 0.9800
C7—C8 1.336 (2) C15—H15C 0.9800
C7—H7 0.9500
C2—C1—C6 118.04 (17) C9—C10—H10 111.2
C6—C1—C7 118.35 (17) C13—C10—H10 111.2 C8—N1—C12 108.00 (15) C10—C11—C12 108.68 (14)
C8—N1—C14 108.42 (15) C10—C11—H11A 110.0
C12—N1—C14 108.48 (15) C12—C11—H11A 110.0
C3—C2—C1 121.29 (18) C10—C11—H11B 110.0
C3—C2—H2 119.4 C12—C11—H11B 110.0
C1—C2—H2 119.4 H11A—C11—H11B 108.3
C4—O2—C15 117.91 (16) N1—C12—C11 111.98 (15)
C2—C3—C4 119.53 (18) N1—C12—H12A 109.2
C2—C3—H3 120.2 C11—C12—H12A 109.2
C4—C3—H3 120.2 N1—C12—H12B 109.2
O2—C4—C5 115.58 (18) C11—C12—H12B 109.2
O2—C4—C3 124.36 (18) H12A—C12—H12B 107.9
C5—C4—C3 120.05 (18) C10—C13—C14 109.01 (16)
C6—C5—C4 120.27 (19) C10—C13—H13A 109.9
C6—C5—H5 119.9 C14—C13—H13A 109.9
C4—C5—H5 119.9 C10—C13—H13B 109.9
C5—C6—C1 120.80 (18) C14—C13—H13B 109.9
C5—C6—H6 119.6 H13A—C13—H13B 108.3
C1—C6—H6 119.6 N1—C14—C13 111.43 (16)
C8—C7—C1 130.35 (17) N1—C14—H14A 109.3
C8—C7—H7 114.8 C13—C14—H14A 109.3
C1—C7—H7 114.8 N1—C14—H14B 109.3
C7—C8—N1 125.04 (16) C13—C14—H14B 109.3
C7—C8—C9 121.39 (17) H14A—C14—H14B 108.0
N1—C8—C9 113.57 (15) O2—C15—H15A 109.5
O1—C9—C8 124.48 (17) O2—C15—H15B 109.5
O1—C9—C10 124.76 (17) H15A—C15—H15B 109.5
C8—C9—C10 110.75 (15) O2—C15—H15C 109.5
C9—C10—C11 106.85 (16) H15A—C15—H15C 109.5 C9—C10—C13 107.79 (15) H15B—C15—H15C 109.5 C11—C10—C13 108.46 (16)
supporting information
sup-5
Acta Cryst. (2006). E62, o396–o397