organic compounds
Quinoline-2-carbaldehyde
aUniversity of the Western Cape, Cape Town, Bellville 7535, South Africa
*Correspondence e-mail: monani@uwc.ac.za
The title compound, C10H7NO, crystallizes with two almost planar molecules (A and B) in the (r.m.s. deviations = 0.018 and 0.020 Å). In the crystal, the A molecules are linked by weak C—H⋯O interactions, thereby generating C(9) [001] chains. The B molecules do not exhibit any directional bonding interactions.
Related literature
For the synthesis of the title compound, see: Cooper & Cohen (1932). For its use in the synthesis of Schiff base ligands and imino-quinolyl-based transition metal complexes, see: Amandola & Mangano (2003); Prema & Wiznycia (2007); Ramos Silva et al. (2007); Ardizzoia et al. (2009). For its catalytic properties, see: Zhou et al. (2008).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: APEX2 (Bruker, 2006); cell SAINT (Bruker, 2006); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); Atwood & Barbour, 2003); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536811035653/hb6393sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811035653/hb6393Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811035653/hb6393Isup3.cml
Single crystals of 2-quinolinecarboxaldehyde were obtained as a result of the decomposition of bis(imino-quinolyl) chloromethyl palladium (II) complex. The bis-palladium (II) complex was prepared from the reaction of a bis(imino-quinolyl) ligand with 2 equimolar PdClMe(cod) in CH2Cl2. Orange needles of the title compound were grown by slow diffusion of hexane into the CH2Cl2 solution of the complex.
All non-hydrogen atoms were refined anisotropically. All hydrogen atoms were placed at geometrically calculated positions with d(C—H) = 0.95 Å and refined as riding on their parent atoms with Uiso (H) = 1.2 Ueq (C). The structure was successfully refined to
factor of 0.0451.As part of our investigation of bimetallic complexes as catalysts for C—C coupling reactions, we attempted to synthesize palladium (II) complexes of a bis(imino-quinolyl) ligand. The binucleating ligand brings two metal centers into closer proximity and the resultant bimetallic complex possesses unique reactivity patterns and unusual catalytic properties (Zhou et al. 2008). In an attempt to prepare a bis(imino-quinolyl) palladium (II) complex, the title compound, (I), waas indavertantly obtained (Fig. 1). Dimensions are available in the archived CIF.
For the synthesis of the title compound, see: Cooper & Cohen (1932). For its use in the synthesis of Schiff base ligands and imino-quinolyl-based transition metal complexes, see: Amandola & Mangano (2003); Prema & Wiznycia (2007); Ramos Silva et al. (2007); Ardizzoia et al. (2009). For its catalytic properties, see: Zhou et al. (2008). For related literature, see: Atwood & Barbour (2003).
Data collection: APEX2 (Bruker, 2006); cell
SAINT (Bruker, 2006); data reduction: SAINT (Bruker, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C10H7NO | F(000) = 656 |
Mr = 157.17 | Dx = 1.346 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 17618 reflections |
a = 7.0639 (7) Å | θ = 2.2–28.4° |
b = 21.564 (2) Å | µ = 0.09 mm−1 |
c = 10.698 (1) Å | T = 173 K |
β = 107.884 (2)° | Needle, orange |
V = 1550.9 (3) Å3 | 0.16 × 0.09 × 0.06 mm |
Z = 8 |
Bruker Kappa DUO APEXII diffractometer | 2379 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.055 |
Graphite monochromator | θmax = 28.4°, θmin = 2.2° |
0.5° φ scans and ω | h = −9→9 |
17618 measured reflections | k = −28→28 |
3887 independent reflections | l = −14→14 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.045 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.117 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0455P)2 + 0.3641P] where P = (Fo2 + 2Fc2)/3 |
3887 reflections | (Δ/σ)max < 0.001 |
217 parameters | Δρmax = 0.20 e Å−3 |
0 restraints | Δρmin = −0.23 e Å−3 |
C10H7NO | V = 1550.9 (3) Å3 |
Mr = 157.17 | Z = 8 |
Monoclinic, P21/n | Mo Kα radiation |
a = 7.0639 (7) Å | µ = 0.09 mm−1 |
b = 21.564 (2) Å | T = 173 K |
c = 10.698 (1) Å | 0.16 × 0.09 × 0.06 mm |
β = 107.884 (2)° |
Bruker Kappa DUO APEXII diffractometer | 2379 reflections with I > 2σ(I) |
17618 measured reflections | Rint = 0.055 |
3887 independent reflections |
R[F2 > 2σ(F2)] = 0.045 | 0 restraints |
wR(F2) = 0.117 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.20 e Å−3 |
3887 reflections | Δρmin = −0.23 e Å−3 |
217 parameters |
Experimental. Half sphere of data collected using the Bruker SAINT software package. Crystal to detector distance = 45 mm; combination of φ and ω scans of 0.5°, 40 s per °, 2 iterations. |
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. |
x | y | z | Uiso*/Ueq | ||
O1A | 0.2759 (2) | 0.51665 (7) | 0.83374 (13) | 0.0500 (4) | |
N1A | 0.25666 (19) | 0.46418 (6) | 0.52163 (13) | 0.0301 (3) | |
C1A | 0.2419 (2) | 0.48240 (7) | 0.39656 (16) | 0.0283 (4) | |
C2A | 0.2385 (2) | 0.43602 (8) | 0.30235 (18) | 0.0377 (4) | |
H2A | 0.2458 | 0.3935 | 0.3265 | 0.045* | |
C3A | 0.2247 (3) | 0.45245 (10) | 0.17677 (19) | 0.0452 (5) | |
H3A | 0.2207 | 0.4211 | 0.1137 | 0.054* | |
C4A | 0.2162 (3) | 0.51490 (10) | 0.13944 (18) | 0.0438 (5) | |
H4A | 0.2089 | 0.5254 | 0.0518 | 0.053* | |
C5A | 0.2184 (2) | 0.56090 (9) | 0.22770 (17) | 0.0371 (4) | |
H5A | 0.2126 | 0.6031 | 0.2013 | 0.045* | |
C6A | 0.2292 (2) | 0.54573 (7) | 0.35861 (16) | 0.0283 (4) | |
C7A | 0.2265 (2) | 0.59065 (8) | 0.45389 (16) | 0.0313 (4) | |
H7A | 0.2169 | 0.6335 | 0.4319 | 0.038* | |
C8A | 0.2379 (2) | 0.57216 (7) | 0.57762 (17) | 0.0319 (4) | |
H8A | 0.2340 | 0.6017 | 0.6427 | 0.038* | |
C9A | 0.2557 (2) | 0.50841 (8) | 0.60734 (16) | 0.0294 (4) | |
C10A | 0.2734 (3) | 0.48493 (9) | 0.74045 (18) | 0.0388 (4) | |
H10A | 0.2836 | 0.4413 | 0.7534 | 0.047* | |
O1B | −0.60926 (19) | 0.21792 (6) | 0.27526 (14) | 0.0513 (4) | |
N1B | −0.1295 (2) | 0.27109 (6) | 0.43627 (14) | 0.0332 (3) | |
C1B | 0.0608 (2) | 0.25250 (7) | 0.50026 (16) | 0.0308 (4) | |
C2B | 0.2086 (3) | 0.29846 (8) | 0.54640 (18) | 0.0388 (4) | |
H2B | 0.1752 | 0.3411 | 0.5320 | 0.047* | |
C3B | 0.4002 (3) | 0.28133 (9) | 0.61193 (18) | 0.0431 (5) | |
H3B | 0.4990 | 0.3123 | 0.6430 | 0.052* | |
C4B | 0.4520 (3) | 0.21879 (9) | 0.63369 (18) | 0.0417 (4) | |
H4B | 0.5860 | 0.2078 | 0.6786 | 0.050* | |
C5B | 0.3129 (2) | 0.17325 (9) | 0.59128 (17) | 0.0381 (4) | |
H5B | 0.3501 | 0.1310 | 0.6076 | 0.046* | |
C6B | 0.1131 (2) | 0.18895 (8) | 0.52288 (16) | 0.0307 (4) | |
C7B | −0.0391 (2) | 0.14417 (8) | 0.47742 (17) | 0.0341 (4) | |
H7B | −0.0098 | 0.1013 | 0.4913 | 0.041* | |
C8B | −0.2280 (2) | 0.16321 (8) | 0.41355 (17) | 0.0343 (4) | |
H8B | −0.3323 | 0.1339 | 0.3821 | 0.041* | |
C9B | −0.2653 (2) | 0.22733 (8) | 0.39511 (16) | 0.0311 (4) | |
C10B | −0.4680 (3) | 0.25053 (9) | 0.32446 (18) | 0.0408 (4) | |
H10B | −0.4873 | 0.2941 | 0.3177 | 0.049* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1A | 0.0461 (8) | 0.0728 (10) | 0.0322 (7) | −0.0039 (7) | 0.0137 (6) | −0.0042 (7) |
N1A | 0.0271 (7) | 0.0288 (7) | 0.0334 (8) | −0.0013 (5) | 0.0079 (6) | −0.0005 (6) |
C1A | 0.0212 (7) | 0.0318 (9) | 0.0314 (9) | −0.0018 (6) | 0.0075 (6) | −0.0042 (7) |
C2A | 0.0332 (9) | 0.0373 (10) | 0.0425 (11) | −0.0025 (7) | 0.0114 (8) | −0.0097 (8) |
C3A | 0.0361 (10) | 0.0611 (13) | 0.0397 (11) | −0.0047 (9) | 0.0134 (8) | −0.0192 (9) |
C4A | 0.0320 (9) | 0.0678 (14) | 0.0311 (10) | −0.0047 (9) | 0.0092 (7) | −0.0011 (9) |
C5A | 0.0290 (9) | 0.0481 (11) | 0.0340 (10) | −0.0020 (7) | 0.0092 (7) | 0.0042 (8) |
C6A | 0.0208 (7) | 0.0331 (9) | 0.0305 (9) | −0.0011 (6) | 0.0073 (6) | 0.0014 (7) |
C7A | 0.0295 (8) | 0.0270 (8) | 0.0373 (10) | −0.0005 (6) | 0.0104 (7) | 0.0017 (7) |
C8A | 0.0300 (8) | 0.0306 (9) | 0.0354 (10) | −0.0021 (7) | 0.0105 (7) | −0.0063 (7) |
C9A | 0.0238 (8) | 0.0341 (9) | 0.0301 (9) | −0.0023 (6) | 0.0079 (6) | −0.0011 (7) |
C10A | 0.0330 (9) | 0.0471 (11) | 0.0349 (10) | −0.0033 (8) | 0.0085 (8) | 0.0042 (8) |
O1B | 0.0357 (7) | 0.0547 (9) | 0.0539 (9) | 0.0027 (6) | −0.0004 (6) | −0.0062 (7) |
N1B | 0.0370 (8) | 0.0289 (7) | 0.0336 (8) | 0.0015 (6) | 0.0107 (6) | −0.0016 (6) |
C1B | 0.0350 (9) | 0.0304 (8) | 0.0290 (9) | −0.0007 (7) | 0.0129 (7) | −0.0026 (7) |
C2B | 0.0439 (10) | 0.0333 (9) | 0.0406 (10) | −0.0082 (8) | 0.0148 (8) | −0.0047 (8) |
C3B | 0.0397 (10) | 0.0475 (11) | 0.0424 (11) | −0.0155 (8) | 0.0131 (8) | −0.0071 (9) |
C4B | 0.0307 (9) | 0.0530 (12) | 0.0396 (10) | −0.0016 (8) | 0.0081 (8) | −0.0013 (9) |
C5B | 0.0341 (9) | 0.0399 (10) | 0.0394 (10) | 0.0017 (8) | 0.0101 (8) | 0.0023 (8) |
C6B | 0.0312 (8) | 0.0321 (9) | 0.0299 (9) | −0.0014 (7) | 0.0110 (7) | −0.0001 (7) |
C7B | 0.0360 (9) | 0.0257 (8) | 0.0398 (10) | 0.0009 (7) | 0.0107 (8) | 0.0010 (7) |
C8B | 0.0324 (9) | 0.0306 (9) | 0.0386 (10) | −0.0026 (7) | 0.0091 (7) | −0.0036 (7) |
C9B | 0.0325 (8) | 0.0310 (9) | 0.0296 (9) | 0.0025 (7) | 0.0090 (7) | −0.0013 (7) |
C10B | 0.0404 (10) | 0.0376 (10) | 0.0413 (11) | 0.0068 (8) | 0.0080 (8) | 0.0000 (8) |
O1A—C10A | 1.206 (2) | O1B—C10B | 1.202 (2) |
N1A—C9A | 1.325 (2) | N1B—C9B | 1.321 (2) |
N1A—C1A | 1.367 (2) | N1B—C1B | 1.368 (2) |
C1A—C2A | 1.415 (2) | C1B—C2B | 1.414 (2) |
C1A—C6A | 1.420 (2) | C1B—C6B | 1.420 (2) |
C2A—C3A | 1.364 (3) | C2B—C3B | 1.370 (3) |
C2A—H2A | 0.9500 | C2B—H2B | 0.9500 |
C3A—C4A | 1.401 (3) | C3B—C4B | 1.398 (3) |
C3A—H3A | 0.9500 | C3B—H3B | 0.9500 |
C4A—C5A | 1.366 (3) | C4B—C5B | 1.364 (2) |
C4A—H4A | 0.9500 | C4B—H4B | 0.9500 |
C5A—C6A | 1.417 (2) | C5B—C6B | 1.417 (2) |
C5A—H5A | 0.9500 | C5B—H5B | 0.9500 |
C6A—C7A | 1.410 (2) | C6B—C7B | 1.416 (2) |
C7A—C8A | 1.361 (2) | C7B—C8B | 1.362 (2) |
C7A—H7A | 0.9500 | C7B—H7B | 0.9500 |
C8A—C9A | 1.408 (2) | C8B—C9B | 1.410 (2) |
C8A—H8A | 0.9500 | C8B—H8B | 0.9500 |
C9A—C10A | 1.480 (2) | C9B—C10B | 1.485 (2) |
C10A—H10A | 0.9500 | C10B—H10B | 0.9500 |
C9A—N1A—C1A | 117.09 (14) | C9B—N1B—C1B | 117.33 (14) |
N1A—C1A—C2A | 118.25 (15) | N1B—C1B—C2B | 118.42 (15) |
N1A—C1A—C6A | 122.37 (14) | N1B—C1B—C6B | 122.15 (14) |
C2A—C1A—C6A | 119.38 (15) | C2B—C1B—C6B | 119.42 (15) |
C3A—C2A—C1A | 119.90 (17) | C3B—C2B—C1B | 119.80 (17) |
C3A—C2A—H2A | 120.1 | C3B—C2B—H2B | 120.1 |
C1A—C2A—H2A | 120.1 | C1B—C2B—H2B | 120.1 |
C2A—C3A—C4A | 120.97 (18) | C2B—C3B—C4B | 120.84 (17) |
C2A—C3A—H3A | 119.5 | C2B—C3B—H3B | 119.6 |
C4A—C3A—H3A | 119.5 | C4B—C3B—H3B | 119.6 |
C5A—C4A—C3A | 120.70 (18) | C5B—C4B—C3B | 120.90 (17) |
C5A—C4A—H4A | 119.7 | C5B—C4B—H4B | 119.5 |
C3A—C4A—H4A | 119.7 | C3B—C4B—H4B | 119.5 |
C4A—C5A—C6A | 120.07 (17) | C4B—C5B—C6B | 120.08 (17) |
C4A—C5A—H5A | 120.0 | C4B—C5B—H5B | 120.0 |
C6A—C5A—H5A | 120.0 | C6B—C5B—H5B | 120.0 |
C7A—C6A—C5A | 123.16 (16) | C7B—C6B—C5B | 123.05 (15) |
C7A—C6A—C1A | 117.88 (15) | C7B—C6B—C1B | 117.98 (15) |
C5A—C6A—C1A | 118.96 (15) | C5B—C6B—C1B | 118.96 (15) |
C8A—C7A—C6A | 119.46 (15) | C8B—C7B—C6B | 119.36 (15) |
C8A—C7A—H7A | 120.3 | C8B—C7B—H7B | 120.3 |
C6A—C7A—H7A | 120.3 | C6B—C7B—H7B | 120.3 |
C7A—C8A—C9A | 118.70 (15) | C7B—C8B—C9B | 118.56 (15) |
C7A—C8A—H8A | 120.6 | C7B—C8B—H8B | 120.7 |
C9A—C8A—H8A | 120.6 | C9B—C8B—H8B | 120.7 |
N1A—C9A—C8A | 124.46 (15) | N1B—C9B—C8B | 124.62 (15) |
N1A—C9A—C10A | 113.76 (15) | N1B—C9B—C10B | 114.65 (15) |
C8A—C9A—C10A | 121.78 (15) | C8B—C9B—C10B | 120.73 (15) |
O1A—C10A—C9A | 125.30 (18) | O1B—C10B—C9B | 124.52 (17) |
O1A—C10A—H10A | 117.4 | O1B—C10B—H10B | 117.7 |
C9A—C10A—H10A | 117.4 | C9B—C10B—H10B | 117.7 |
C9A—N1A—C1A—C2A | −178.72 (14) | C9B—N1B—C1B—C2B | −179.40 (16) |
C9A—N1A—C1A—C6A | 1.0 (2) | C9B—N1B—C1B—C6B | −0.2 (2) |
N1A—C1A—C2A—C3A | −179.74 (15) | N1B—C1B—C2B—C3B | 179.39 (16) |
C6A—C1A—C2A—C3A | 0.5 (2) | C6B—C1B—C2B—C3B | 0.2 (3) |
C1A—C2A—C3A—C4A | 0.8 (3) | C1B—C2B—C3B—C4B | 0.2 (3) |
C2A—C3A—C4A—C5A | −1.1 (3) | C2B—C3B—C4B—C5B | −0.6 (3) |
C3A—C4A—C5A—C6A | 0.0 (3) | C3B—C4B—C5B—C6B | 0.7 (3) |
C4A—C5A—C6A—C7A | −178.22 (16) | C4B—C5B—C6B—C7B | −179.28 (17) |
C4A—C5A—C6A—C1A | 1.3 (2) | C4B—C5B—C6B—C1B | −0.4 (3) |
N1A—C1A—C6A—C7A | −1.7 (2) | N1B—C1B—C6B—C7B | −0.3 (2) |
C2A—C1A—C6A—C7A | 178.00 (15) | C2B—C1B—C6B—C7B | 178.91 (16) |
N1A—C1A—C6A—C5A | 178.70 (14) | N1B—C1B—C6B—C5B | −179.26 (15) |
C2A—C1A—C6A—C5A | −1.6 (2) | C2B—C1B—C6B—C5B | −0.1 (2) |
C5A—C6A—C7A—C8A | −179.86 (15) | C5B—C6B—C7B—C8B | 179.36 (17) |
C1A—C6A—C7A—C8A | 0.6 (2) | C1B—C6B—C7B—C8B | 0.4 (2) |
C6A—C7A—C8A—C9A | 1.1 (2) | C6B—C7B—C8B—C9B | −0.1 (3) |
C1A—N1A—C9A—C8A | 0.9 (2) | C1B—N1B—C9B—C8B | 0.6 (3) |
C1A—N1A—C9A—C10A | −179.66 (13) | C1B—N1B—C9B—C10B | −179.01 (15) |
C7A—C8A—C9A—N1A | −2.0 (2) | C7B—C8B—C9B—N1B | −0.4 (3) |
C7A—C8A—C9A—C10A | 178.60 (15) | C7B—C8B—C9B—C10B | 179.14 (16) |
N1A—C9A—C10A—O1A | 179.95 (16) | N1B—C9B—C10B—O1B | 176.94 (18) |
C8A—C9A—C10A—O1A | −0.6 (3) | C8B—C9B—C10B—O1B | −2.6 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C4A—H4A···O1Ai | 0.95 | 2.53 | 3.424 (2) | 158 |
Symmetry code: (i) x, y, z−1. |
Experimental details
Crystal data | |
Chemical formula | C10H7NO |
Mr | 157.17 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 173 |
a, b, c (Å) | 7.0639 (7), 21.564 (2), 10.698 (1) |
β (°) | 107.884 (2) |
V (Å3) | 1550.9 (3) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.16 × 0.09 × 0.06 |
Data collection | |
Diffractometer | Bruker Kappa DUO APEXII |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 17618, 3887, 2379 |
Rint | 0.055 |
(sin θ/λ)max (Å−1) | 0.670 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.045, 0.117, 1.00 |
No. of reflections | 3887 |
No. of parameters | 217 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.20, −0.23 |
Computer programs: APEX2 (Bruker, 2006), SAINT (Bruker, 2006), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001).
D—H···A | D—H | H···A | D···A | D—H···A |
C4A—H4A···O1Ai | 0.95 | 2.53 | 3.424 (2) | 158 |
Symmetry code: (i) x, y, z−1. |
Acknowledgements
The authors acknowledge financial support from the NRF–Thuthuka division and the University of the Western Cape Senate Research.
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As part of our investigation of bimetallic complexes as catalysts for C—C coupling reactions, we attempted to synthesize palladium (II) complexes of a bis(imino-quinolyl) ligand. The binucleating ligand brings two metal centers into closer proximity and the resultant bimetallic complex possesses unique reactivity patterns and unusual catalytic properties (Zhou et al. 2008). In an attempt to prepare a bis(imino-quinolyl) palladium (II) complex, the title compound, (I), waas indavertantly obtained (Fig. 1). Dimensions are available in the archived CIF.