The title zwitterion, C
17H
14N
2O
2, crystallizes with two independent molecules in the asymmetric unit, both of which are approximately planar, the dihedral angles between the benzene ring and the naphthalene ring system being 4.39 (12)° in one molecule and 5.83 (12)° in the other, and show an
E conformation with respect to the azo double bond. An intramolecular N—H
O hydrogen bond in each molecule helps to establish their near planar conformation. In the crystal, molecules are linked through O—H
O hydrogen bonds into infinite chains running along the
a-axis direction. In addition, the chains are stacked along the
b axis
via π–π interactions between the benzene and the naphthalene rings of adjacent molecules, the centroid–centroid distances being 3.722 (3) and 3.823 (4) Å.
Supporting information
CCDC reference: 961834
Key indicators
- Single-crystal X-ray study
- T = 150 K
- Mean (C-C) = 0.004 Å
- R factor = 0.068
- wR factor = 0.202
- Data-to-parameter ratio = 16.7
checkCIF/PLATON results
No syntax errors found
Alert level C
PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds ............... 0.0042 Ang.
PLAT906_ALERT_3_C Large K value in the Analysis of Variance ...... 12.110
PLAT906_ALERT_3_C Large K value in the Analysis of Variance ...... 2.726
PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 3
PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 6
Alert level G
PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF ? Do !
PLAT007_ALERT_5_G Note: Number of Unrefined Donor-H Atoms ........ 2
PLAT128_ALERT_4_G Note: Alternate Setting of Space-group P21/c . P21/a
PLAT153_ALERT_1_G The su's on the Cell Axes are Equal .......... 0.00500 Ang.
PLAT333_ALERT_2_G Check Large Av C6-Ring C-C Dist. C1 -C6 1.42 Ang.
PLAT333_ALERT_2_G Check Large Av C6-Ring C-C Dist. C18 -C23 1.42 Ang.
PLAT380_ALERT_4_G Check Incorrectly? Oriented X(sp2)-Methyl Moiety C17
PLAT380_ALERT_4_G Check Incorrectly? Oriented X(sp2)-Methyl Moiety C34
PLAT860_ALERT_3_G Note: Number of Least-Squares Restraints ....... 2
PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L= 0.600 55
0 ALERT level A = Most likely a serious problem - resolve or explain
0 ALERT level B = A potentially serious problem, consider carefully
5 ALERT level C = Check. Ensure it is not caused by an omission or oversight
10 ALERT level G = General information/check it is not something unexpected
1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
2 ALERT type 2 Indicator that the structure model may be wrong or deficient
6 ALERT type 3 Indicator that the structure quality may be low
4 ALERT type 4 Improvement, methodology, query or suggestion
2 ALERT type 5 Informative message, check
checkCIF publication errors
Alert level A
PUBL022_ALERT_1_A There is a mismatched ~ on line 153
The title zwitterion, C~17~H~14~N~2 O~2~, crystalyzes with two independent
If you require a ~ then it should be escaped
with a \, i.e. \~
Otherwise there must be a matching closing ~, e.g. C~2~H~4~
1 ALERT level A = Data missing that is essential or data in wrong format
0 ALERT level G = General alerts. Data that may be required is missing
The title compound
(E)-1-((2-hydroxy-5-methylphenyl)diazenyl)naphthalen-2-ol was prepared
following the classical method of synthesis of other aromatic azo-compounds
(Wang et al., 2003). Diazotization of 2-amino-4-methylphenol
followed
by a coupling reaction with 2-naphthol. This gives a red powder which was
recrystallized from ethanol leading to crystals in the form of red prisms.
All non-hydrogen atoms were refined with anisotropic atomic displacement
parameters. All H atoms, attached to carbo(n atoms have been placed in
geometrically idealized positions and refined as riding, with C—H = 0.93
(aromatic), 0.96 Å (methyl), and Uiso(H) = 1.2 Ueq(C) or
1.5 Ueq(methyl C). Hydroxyl H atoms were introduced in calculated
positions and treated as riding on their parent atoms with O—H = 0.82 Å
(hydroxyl) and Uiso(H) = 1.5 Ueq(O). The remaining H atoms
of amino-group were located in a difference Fourier map and refined freely
with N—H= 0.88 Å and Uiso(H) = 1.2 Ueq(N).
Data collection: APEX2 (Bruker, 2006); cell refinement: SAINT (Bruker, 2006); data reduction: SAINT (Bruker, 2006); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: WinGX (Farrugia, 2012).
1-[(
E)-2-(2-Hydroxy-5-methylphenyl)diazen-2-ium-1-yl]naphthalen-2-olate
top
Crystal data top
C17H14N2O2 | F(000) = 1168 |
Mr = 278.31 | Dx = 1.316 Mg m−3 |
Monoclinic, P21/a | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yab | Cell parameters from 2052 reflections |
a = 14.541 (5) Å | θ = 3.1–28.6° |
b = 6.052 (5) Å | µ = 0.09 mm−1 |
c = 32.633 (5) Å | T = 150 K |
β = 101.871 (5)° | Prism, red |
V = 2810 (3) Å3 | 0.03 × 0.02 × 0.02 mm |
Z = 8 | |
Data collection top
Bruker APEXII diffractometer | 6447 independent reflections |
Radiation source: fine-focus sealed tube | 3301 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.078 |
CCD rotation images, thin slices ω scans | θmax = 27.6°, θmin = 2.6° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2002) | h = −15→18 |
Tmin = 0.853, Tmax = 0.995 | k = −7→7 |
20440 measured reflections | l = −42→42 |
Refinement top
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.068 | All H-atom parameters refined |
wR(F2) = 0.202 | w = 1/[σ2(Fo2) + (0.0877P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.05 | (Δ/σ)max < 0.001 |
6447 reflections | Δρmax = 0.44 e Å−3 |
386 parameters | Δρmin = −0.40 e Å−3 |
2 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0045 (9) |
Crystal data top
C17H14N2O2 | V = 2810 (3) Å3 |
Mr = 278.31 | Z = 8 |
Monoclinic, P21/a | Mo Kα radiation |
a = 14.541 (5) Å | µ = 0.09 mm−1 |
b = 6.052 (5) Å | T = 150 K |
c = 32.633 (5) Å | 0.03 × 0.02 × 0.02 mm |
β = 101.871 (5)° | |
Data collection top
Bruker APEXII diffractometer | 6447 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2002) | 3301 reflections with I > 2σ(I) |
Tmin = 0.853, Tmax = 0.995 | Rint = 0.078 |
20440 measured reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.068 | 2 restraints |
wR(F2) = 0.202 | All H-atom parameters refined |
S = 1.05 | Δρmax = 0.44 e Å−3 |
6447 reflections | Δρmin = −0.40 e Å−3 |
386 parameters | |
Special details top
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
O1 | 0.85799 (14) | 0.2548 (4) | 0.70663 (5) | 0.0333 (7) | |
O2 | 0.71941 (15) | 0.6953 (4) | 0.72953 (5) | 0.0412 (8) | |
N1 | 0.76040 (16) | 0.5426 (4) | 0.66053 (6) | 0.0258 (8) | |
N2 | 0.78287 (15) | 0.4506 (4) | 0.62766 (6) | 0.0242 (8) | |
C1 | 0.83515 (19) | 0.2673 (5) | 0.63285 (7) | 0.0231 (9) | |
C2 | 0.87195 (19) | 0.1652 (5) | 0.67294 (8) | 0.0266 (9) | |
C3 | 0.9241 (2) | −0.0362 (5) | 0.67367 (9) | 0.0313 (10) | |
C4 | 0.9385 (2) | −0.1299 (6) | 0.63794 (9) | 0.0353 (10) | |
C5 | 0.9043 (2) | −0.0319 (5) | 0.59751 (9) | 0.0314 (10) | |
C6 | 0.85416 (19) | 0.1681 (5) | 0.59467 (8) | 0.0269 (9) | |
C7 | 0.8225 (2) | 0.2665 (6) | 0.55501 (8) | 0.0323 (10) | |
C8 | 0.8408 (2) | 0.1641 (7) | 0.51963 (9) | 0.0405 (13) | |
C9 | 0.8902 (2) | −0.0332 (7) | 0.52232 (9) | 0.0460 (13) | |
C10 | 0.9220 (2) | −0.1313 (6) | 0.56069 (10) | 0.0417 (11) | |
C11 | 0.67371 (18) | 0.8433 (5) | 0.61950 (8) | 0.0260 (9) | |
C12 | 0.70569 (19) | 0.7317 (5) | 0.65715 (7) | 0.0239 (9) | |
C13 | 0.6843 (2) | 0.8137 (5) | 0.69426 (8) | 0.0294 (10) | |
C14 | 0.6314 (2) | 1.0036 (6) | 0.69274 (9) | 0.0329 (10) | |
C15 | 0.6020 (2) | 1.1148 (5) | 0.65539 (9) | 0.0329 (10) | |
C16 | 0.62311 (19) | 1.0343 (5) | 0.61810 (8) | 0.0290 (9) | |
C17 | 0.5923 (2) | 1.1604 (6) | 0.57752 (8) | 0.0381 (11) | |
O5 | 0.48488 (15) | 0.3516 (4) | 0.77309 (5) | 0.0463 (8) | |
O6 | 0.65278 (14) | 0.7820 (4) | 0.79689 (5) | 0.0320 (7) | |
N5 | 0.65874 (15) | 0.5554 (4) | 0.87388 (6) | 0.0237 (7) | |
N6 | 0.60151 (16) | 0.4768 (4) | 0.84100 (6) | 0.0242 (7) | |
C18 | 0.70644 (18) | 0.7387 (5) | 0.87009 (7) | 0.0221 (9) | |
C19 | 0.70315 (19) | 0.8573 (5) | 0.83094 (8) | 0.0258 (9) | |
C20 | 0.7571 (2) | 1.0531 (5) | 0.83189 (9) | 0.0328 (10) | |
C21 | 0.8074 (2) | 1.1348 (5) | 0.86792 (9) | 0.0334 (10) | |
C22 | 0.81280 (19) | 1.0263 (5) | 0.90750 (8) | 0.0296 (10) | |
C23 | 0.76401 (18) | 0.8269 (5) | 0.90856 (8) | 0.0271 (9) | |
C24 | 0.7715 (2) | 0.7172 (6) | 0.94742 (8) | 0.0318 (10) | |
C25 | 0.8247 (2) | 0.8060 (7) | 0.98344 (9) | 0.0409 (13) | |
C26 | 0.8725 (2) | 1.0028 (7) | 0.98229 (9) | 0.0445 (13) | |
C27 | 0.8668 (2) | 1.1131 (6) | 0.94502 (10) | 0.0398 (11) | |
C28 | 0.55747 (18) | 0.1612 (5) | 0.88028 (8) | 0.0253 (9) | |
C29 | 0.54976 (19) | 0.2860 (5) | 0.84352 (8) | 0.0241 (9) | |
C30 | 0.4884 (2) | 0.2180 (5) | 0.80699 (8) | 0.0290 (9) | |
C31 | 0.4377 (2) | 0.0253 (5) | 0.80731 (8) | 0.0328 (10) | |
C32 | 0.4475 (2) | −0.0984 (5) | 0.84354 (8) | 0.0313 (10) | |
C33 | 0.5071 (2) | −0.0301 (5) | 0.88087 (8) | 0.0274 (9) | |
C34 | 0.5164 (2) | −0.1643 (6) | 0.92034 (8) | 0.0367 (10) | |
H1 | 0.781 (2) | 0.481 (5) | 0.6851 (5) | 0.0489* | |
H2 | 0.70371 | 0.75370 | 0.74970 | 0.0619* | |
H3 | 0.94842 | −0.10365 | 0.69920 | 0.0376* | |
H4 | 0.97170 | −0.26203 | 0.63954 | 0.0423* | |
H7 | 0.78964 | 0.39927 | 0.55271 | 0.0386* | |
H8 | 0.81957 | 0.22875 | 0.49355 | 0.0487* | |
H9 | 0.90187 | −0.09938 | 0.49818 | 0.0552* | |
H10 | 0.95517 | −0.26348 | 0.56240 | 0.0499* | |
H11 | 0.68711 | 0.78663 | 0.59490 | 0.0311* | |
H14 | 0.61529 | 1.05717 | 0.71705 | 0.0396* | |
H15 | 0.56774 | 1.24489 | 0.65496 | 0.0396* | |
H17A | 0.55759 | 1.28918 | 0.58247 | 0.0573* | |
H17B | 0.55310 | 1.06748 | 0.55729 | 0.0573* | |
H17C | 0.64657 | 1.20441 | 0.56707 | 0.0573* | |
H5 | 0.44769 | 0.30035 | 0.75300 | 0.0694* | |
H6 | 0.598 (2) | 0.545 (5) | 0.8168 (5) | 0.0489* | |
H20 | 0.75780 | 1.12678 | 0.80695 | 0.0393* | |
H21 | 0.83982 | 1.26671 | 0.86719 | 0.0401* | |
H24 | 0.74025 | 0.58398 | 0.94863 | 0.0381* | |
H25 | 0.82845 | 0.73308 | 1.00881 | 0.0489* | |
H26 | 0.90867 | 1.06058 | 1.00680 | 0.0532* | |
H27 | 0.89877 | 1.24589 | 0.94449 | 0.0476* | |
H28 | 0.59739 | 0.20899 | 0.90469 | 0.0303* | |
H31 | 0.39691 | −0.02143 | 0.78307 | 0.0393* | |
H32 | 0.41389 | −0.22936 | 0.84320 | 0.0375* | |
H34A | 0.47613 | −0.29120 | 0.91504 | 0.0551* | |
H34B | 0.49865 | −0.07553 | 0.94183 | 0.0551* | |
H34C | 0.58041 | −0.21161 | 0.92933 | 0.0551* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
O1 | 0.0407 (12) | 0.0334 (14) | 0.0234 (10) | 0.0083 (11) | 0.0008 (8) | 0.0036 (9) |
O2 | 0.0582 (14) | 0.0441 (16) | 0.0211 (10) | 0.0199 (12) | 0.0074 (9) | 0.0021 (9) |
N1 | 0.0326 (14) | 0.0233 (15) | 0.0205 (11) | 0.0021 (12) | 0.0034 (10) | 0.0014 (10) |
N2 | 0.0271 (13) | 0.0227 (15) | 0.0225 (11) | −0.0016 (11) | 0.0046 (9) | −0.0026 (10) |
C1 | 0.0230 (14) | 0.0216 (17) | 0.0234 (13) | −0.0017 (13) | 0.0017 (10) | −0.0033 (11) |
C2 | 0.0272 (15) | 0.0227 (18) | 0.0289 (14) | −0.0002 (13) | 0.0036 (11) | 0.0022 (12) |
C3 | 0.0305 (16) | 0.0249 (19) | 0.0352 (15) | 0.0003 (14) | −0.0011 (12) | 0.0072 (13) |
C4 | 0.0309 (17) | 0.0232 (19) | 0.0505 (18) | 0.0022 (15) | 0.0055 (14) | −0.0014 (14) |
C5 | 0.0243 (15) | 0.028 (2) | 0.0412 (16) | −0.0043 (14) | 0.0054 (12) | −0.0087 (14) |
C6 | 0.0255 (15) | 0.0253 (19) | 0.0278 (14) | −0.0042 (13) | 0.0007 (11) | −0.0077 (12) |
C7 | 0.0341 (16) | 0.035 (2) | 0.0264 (14) | −0.0017 (15) | 0.0028 (12) | −0.0045 (13) |
C8 | 0.0388 (18) | 0.053 (3) | 0.0277 (15) | −0.0015 (18) | 0.0021 (13) | −0.0096 (15) |
C9 | 0.0393 (19) | 0.058 (3) | 0.0396 (18) | −0.0005 (19) | 0.0056 (15) | −0.0256 (17) |
C10 | 0.0335 (18) | 0.036 (2) | 0.055 (2) | 0.0026 (16) | 0.0075 (15) | −0.0217 (16) |
C11 | 0.0275 (15) | 0.0258 (18) | 0.0242 (13) | −0.0018 (14) | 0.0045 (11) | 0.0009 (12) |
C12 | 0.0259 (14) | 0.0203 (17) | 0.0254 (13) | 0.0013 (13) | 0.0052 (11) | −0.0005 (11) |
C13 | 0.0329 (16) | 0.028 (2) | 0.0274 (14) | 0.0023 (15) | 0.0065 (12) | 0.0018 (12) |
C14 | 0.0348 (17) | 0.031 (2) | 0.0335 (15) | 0.0025 (15) | 0.0087 (13) | −0.0045 (13) |
C15 | 0.0305 (16) | 0.0223 (19) | 0.0460 (17) | 0.0037 (14) | 0.0078 (13) | 0.0015 (14) |
C16 | 0.0237 (15) | 0.0267 (19) | 0.0362 (15) | −0.0006 (14) | 0.0052 (12) | 0.0091 (13) |
C17 | 0.0390 (18) | 0.034 (2) | 0.0411 (17) | 0.0098 (16) | 0.0079 (14) | 0.0145 (14) |
O5 | 0.0615 (15) | 0.0451 (16) | 0.0242 (10) | −0.0219 (13) | −0.0100 (10) | 0.0046 (10) |
O6 | 0.0402 (12) | 0.0312 (14) | 0.0244 (10) | −0.0030 (10) | 0.0061 (8) | 0.0013 (9) |
N5 | 0.0246 (12) | 0.0242 (15) | 0.0209 (10) | −0.0002 (11) | 0.0018 (9) | −0.0020 (10) |
N6 | 0.0290 (13) | 0.0226 (15) | 0.0188 (10) | −0.0024 (11) | −0.0002 (10) | −0.0003 (10) |
C18 | 0.0240 (14) | 0.0196 (17) | 0.0225 (13) | 0.0014 (13) | 0.0044 (10) | −0.0018 (11) |
C19 | 0.0286 (15) | 0.0236 (18) | 0.0258 (14) | 0.0041 (14) | 0.0067 (11) | −0.0002 (12) |
C20 | 0.0340 (17) | 0.0259 (19) | 0.0403 (16) | −0.0018 (15) | 0.0121 (14) | 0.0067 (14) |
C21 | 0.0298 (16) | 0.0188 (18) | 0.0541 (18) | −0.0031 (14) | 0.0144 (14) | −0.0020 (14) |
C22 | 0.0276 (16) | 0.0257 (19) | 0.0364 (15) | 0.0008 (14) | 0.0085 (12) | −0.0077 (13) |
C23 | 0.0231 (15) | 0.0278 (19) | 0.0293 (14) | 0.0016 (13) | 0.0028 (11) | −0.0093 (12) |
C24 | 0.0301 (16) | 0.037 (2) | 0.0271 (14) | −0.0033 (15) | 0.0034 (12) | −0.0060 (13) |
C25 | 0.0365 (18) | 0.059 (3) | 0.0262 (15) | −0.0017 (18) | 0.0040 (12) | −0.0110 (15) |
C26 | 0.0336 (18) | 0.063 (3) | 0.0361 (17) | −0.0065 (18) | 0.0055 (14) | −0.0266 (17) |
C27 | 0.0325 (17) | 0.033 (2) | 0.0536 (19) | −0.0080 (16) | 0.0085 (14) | −0.0188 (16) |
C28 | 0.0251 (15) | 0.0258 (18) | 0.0237 (13) | 0.0019 (13) | 0.0022 (11) | 0.0017 (12) |
C29 | 0.0250 (14) | 0.0210 (17) | 0.0254 (13) | 0.0002 (13) | 0.0030 (11) | −0.0023 (11) |
C30 | 0.0345 (16) | 0.0289 (19) | 0.0217 (13) | −0.0034 (15) | 0.0013 (11) | −0.0002 (12) |
C31 | 0.0326 (17) | 0.032 (2) | 0.0313 (15) | −0.0076 (15) | 0.0006 (12) | −0.0062 (13) |
C32 | 0.0290 (16) | 0.0216 (18) | 0.0426 (16) | −0.0057 (14) | 0.0060 (13) | 0.0007 (13) |
C33 | 0.0269 (15) | 0.0209 (18) | 0.0356 (15) | 0.0038 (14) | 0.0090 (12) | 0.0042 (12) |
C34 | 0.0333 (17) | 0.033 (2) | 0.0441 (17) | −0.0015 (16) | 0.0088 (13) | 0.0099 (14) |
Geometric parameters (Å, º) top
O1—C2 | 1.279 (3) | C10—H10 | 0.9300 |
O2—C13 | 1.363 (3) | C11—H11 | 0.9300 |
O2—H2 | 0.8200 | C14—H14 | 0.9300 |
O5—C30 | 1.363 (4) | C15—H15 | 0.9300 |
O6—C19 | 1.282 (3) | C17—H17B | 0.9600 |
O5—H5 | 0.8200 | C17—H17A | 0.9600 |
N1—C12 | 1.385 (4) | C17—H17C | 0.9600 |
N1—N2 | 1.308 (3) | C18—C19 | 1.458 (4) |
N2—C1 | 1.336 (4) | C18—C23 | 1.459 (4) |
N1—H1 | 0.88 (2) | C19—C20 | 1.418 (4) |
N5—C18 | 1.328 (4) | C20—C21 | 1.345 (4) |
N5—N6 | 1.305 (3) | C21—C22 | 1.437 (4) |
N6—C29 | 1.390 (4) | C22—C27 | 1.413 (4) |
N6—H6 | 0.88 (2) | C22—C23 | 1.404 (4) |
C1—C2 | 1.446 (4) | C23—C24 | 1.416 (4) |
C1—C6 | 1.460 (4) | C24—C25 | 1.377 (4) |
C2—C3 | 1.433 (4) | C25—C26 | 1.383 (6) |
C3—C4 | 1.351 (4) | C26—C27 | 1.375 (5) |
C4—C5 | 1.439 (4) | C28—C33 | 1.372 (4) |
C5—C10 | 1.414 (5) | C28—C29 | 1.402 (4) |
C5—C6 | 1.406 (4) | C29—C30 | 1.396 (4) |
C6—C7 | 1.413 (4) | C30—C31 | 1.381 (4) |
C7—C8 | 1.384 (4) | C31—C32 | 1.382 (4) |
C8—C9 | 1.387 (6) | C32—C33 | 1.404 (4) |
C9—C10 | 1.377 (5) | C33—C34 | 1.505 (4) |
C11—C12 | 1.395 (4) | C20—H20 | 0.9300 |
C11—C16 | 1.366 (4) | C21—H21 | 0.9300 |
C12—C13 | 1.402 (4) | C24—H24 | 0.9300 |
C13—C14 | 1.378 (5) | C25—H25 | 0.9300 |
C14—C15 | 1.381 (4) | C26—H26 | 0.9300 |
C15—C16 | 1.402 (4) | C27—H27 | 0.9300 |
C16—C17 | 1.514 (4) | C28—H28 | 0.9300 |
C3—H3 | 0.9300 | C31—H31 | 0.9300 |
C4—H4 | 0.9300 | C32—H32 | 0.9300 |
C7—H7 | 0.9300 | C34—H34A | 0.9600 |
C8—H8 | 0.9300 | C34—H34B | 0.9600 |
C9—H9 | 0.9300 | C34—H34C | 0.9600 |
| | | |
O1···N1 | 2.536 (4) | C17···H9vi | 2.8800 |
O1···N2 | 2.843 (4) | C18···H34Civ | 2.9400 |
O1···O5i | 2.622 (3) | C19···H2 | 2.7300 |
O2···O6 | 2.631 (3) | C19···H6 | 2.42 (3) |
O2···N1 | 2.614 (4) | C20···H32i | 2.9700 |
O5···C3ii | 3.373 (4) | C21···H32i | 3.1000 |
O5···O1ii | 2.622 (3) | C22···H34Ai | 2.7400 |
O5···N6 | 2.611 (4) | C23···H34Civ | 2.9000 |
O5···C2ii | 3.344 (4) | C23···H34Ai | 3.0600 |
O6···N6 | 2.546 (4) | C24···H34Civ | 2.7500 |
O6···N5 | 2.848 (4) | C25···H24vii | 3.0800 |
O6···O2 | 2.631 (3) | C26···H24vii | 3.0900 |
O1···H1 | 1.82 (3) | C27···H34Ai | 2.8100 |
O1···H5i | 1.8100 | C31···H21viii | 2.9300 |
O2···H1 | 2.26 (3) | C32···H21viii | 2.7500 |
O5···H3ii | 2.8100 | C33···H21viii | 2.8700 |
O5···H6 | 2.27 (3) | C34···H26ix | 2.9200 |
O6···H6 | 1.82 (3) | H1···O2 | 2.26 (3) |
O6···H2 | 1.8500 | H1···C2 | 2.40 (3) |
N1···C15iii | 3.446 (5) | H1···O1 | 1.82 (3) |
N1···O1 | 2.536 (4) | H2···H14 | 2.3700 |
N1···O2 | 2.614 (4) | H2···O6 | 1.8500 |
N2···O1 | 2.843 (4) | H2···C19 | 2.7300 |
N2···C4iv | 3.372 (5) | H3···O5i | 2.8100 |
N2···C16iii | 3.398 (5) | H3···H5i | 2.5400 |
N2···C17iii | 3.402 (5) | H4···C15i | 2.8300 |
N5···O6 | 2.848 (4) | H4···H10 | 2.4800 |
N5···C33iv | 3.378 (5) | H4···C14i | 2.9800 |
N5···C34iv | 3.279 (5) | H4···C16i | 2.9500 |
N5···C21iii | 3.371 (5) | H5···C2ii | 2.6300 |
N6···O5 | 2.611 (4) | H5···C3ii | 2.9100 |
N6···O6 | 2.546 (4) | H5···H3ii | 2.5400 |
N6···C32iv | 3.422 (5) | H5···H31 | 2.3700 |
N2···H7 | 2.4900 | H5···O1ii | 1.8100 |
N2···H11 | 2.5700 | H6···C19 | 2.42 (3) |
N2···H17Ciii | 2.9100 | H6···O5 | 2.27 (3) |
N5···H34Civ | 2.7200 | H6···O6 | 1.82 (3) |
N5···H24 | 2.4900 | H7···N2 | 2.4900 |
N5···H28 | 2.5600 | H7···H17Ciii | 2.5200 |
C1···C11iii | 3.445 (5) | H9···C17x | 2.8800 |
C1···C16iii | 3.334 (5) | H9···H17Cx | 2.4100 |
C2···C12iii | 3.533 (5) | H10···H4 | 2.4800 |
C2···O5i | 3.344 (4) | H10···C17i | 3.1000 |
C3···O5i | 3.373 (4) | H10···H17Bi | 2.3500 |
C3···C12iii | 3.413 (5) | H11···N2 | 2.5700 |
C4···N2iii | 3.372 (5) | H14···H2 | 2.3700 |
C6···C11iii | 3.504 (5) | H15···H17A | 2.3500 |
C11···C6iv | 3.504 (5) | H15···C2viii | 3.0700 |
C11···C1iv | 3.445 (5) | H15···C3viii | 2.8900 |
C12···C3iv | 3.413 (5) | H15···C4viii | 2.9700 |
C12···C2iv | 3.533 (5) | H17A···H15 | 2.3500 |
C15···N1iv | 3.446 (5) | H17A···C5viii | 2.8000 |
C16···C1iv | 3.334 (5) | H17A···C6viii | 3.0800 |
C16···N2iv | 3.398 (5) | H17A···C10viii | 2.8500 |
C17···N2iv | 3.402 (5) | H17B···H10ii | 2.3500 |
C18···C33iv | 3.302 (5) | H17C···N2iv | 2.9100 |
C18···C28iv | 3.411 (5) | H17C···C6iv | 2.9800 |
C18···C34iv | 3.540 (5) | H17C···C7iv | 2.6900 |
C19···C28iv | 3.445 (5) | H17C···H7iv | 2.5200 |
C19···C29iv | 3.500 (5) | H17C···H9vi | 2.4100 |
C20···C29iv | 3.419 (5) | H21···H27 | 2.4900 |
C21···N5iv | 3.371 (5) | H21···C31v | 2.9300 |
C23···C28iv | 3.581 (5) | H21···C32v | 2.7500 |
C28···C19iii | 3.445 (5) | H21···C33v | 2.8700 |
C28···C18iii | 3.411 (5) | H24···N5 | 2.4900 |
C28···C23iii | 3.581 (5) | H24···H34Civ | 2.5900 |
C29···C19iii | 3.500 (5) | H24···C25xi | 3.0800 |
C29···C20iii | 3.419 (5) | H24···C26xi | 3.0900 |
C32···N6iii | 3.422 (5) | H26···C34xii | 2.9200 |
C33···C18iii | 3.302 (5) | H26···H34Cxii | 2.4800 |
C33···N5iii | 3.378 (5) | H27···H21 | 2.4900 |
C34···N5iii | 3.279 (5) | H27···H34Bv | 2.4800 |
C34···C18iii | 3.540 (5) | H28···N5 | 2.5600 |
C2···H15v | 3.0700 | H31···H5 | 2.3700 |
C2···H1 | 2.40 (3) | H32···H34A | 2.3600 |
C2···H5i | 2.6300 | H32···C20ii | 2.9700 |
C3···H15v | 2.8900 | H32···C21ii | 3.1000 |
C3···H5i | 2.9100 | H34A···H32 | 2.3600 |
C4···H15v | 2.9700 | H34A···C22ii | 2.7400 |
C5···H17Av | 2.8000 | H34A···C23ii | 3.0600 |
C6···H17Av | 3.0800 | H34A···C27ii | 2.8100 |
C6···H17Ciii | 2.9800 | H34B···H27viii | 2.4800 |
C7···H17Ciii | 2.6900 | H34C···N5iii | 2.7200 |
C10···H17Av | 2.8500 | H34C···C18iii | 2.9400 |
C14···H4ii | 2.9800 | H34C···C23iii | 2.9000 |
C15···H4ii | 2.8300 | H34C···C24iii | 2.7500 |
C16···H4ii | 2.9500 | H34C···H24iii | 2.5900 |
C17···H10ii | 3.1000 | H34C···H26ix | 2.4800 |
| | | |
C13—O2—H2 | 109.00 | H17B—C17—H17C | 109.00 |
C30—O5—H5 | 109.00 | C16—C17—H17A | 109.00 |
N2—N1—C12 | 121.5 (2) | C16—C17—H17B | 109.00 |
N1—N2—C1 | 118.8 (2) | H17A—C17—H17B | 109.00 |
N2—N1—H1 | 118.1 (18) | C16—C17—H17C | 109.00 |
C12—N1—H1 | 120.4 (18) | N5—C18—C23 | 116.4 (2) |
N6—N5—C18 | 119.0 (2) | C19—C18—C23 | 118.9 (3) |
N5—N6—C29 | 121.0 (2) | N5—C18—C19 | 124.7 (2) |
N5—N6—H6 | 118.3 (18) | O6—C19—C20 | 122.1 (3) |
C29—N6—H6 | 120.6 (18) | O6—C19—C18 | 119.6 (3) |
N2—C1—C6 | 115.9 (2) | C18—C19—C20 | 118.3 (2) |
C2—C1—C6 | 119.8 (3) | C19—C20—C21 | 121.7 (3) |
N2—C1—C2 | 124.4 (2) | C20—C21—C22 | 122.5 (3) |
O1—C2—C3 | 121.6 (2) | C23—C22—C27 | 119.5 (3) |
C1—C2—C3 | 118.3 (2) | C21—C22—C23 | 118.7 (2) |
O1—C2—C1 | 120.1 (3) | C21—C22—C27 | 121.8 (3) |
C2—C3—C4 | 121.2 (3) | C18—C23—C22 | 119.8 (2) |
C3—C4—C5 | 122.2 (3) | C18—C23—C24 | 121.6 (3) |
C4—C5—C6 | 119.5 (3) | C22—C23—C24 | 118.6 (3) |
C4—C5—C10 | 121.0 (3) | C23—C24—C25 | 120.5 (3) |
C6—C5—C10 | 119.5 (3) | C24—C25—C26 | 120.7 (3) |
C1—C6—C7 | 121.7 (3) | C25—C26—C27 | 120.2 (3) |
C1—C6—C5 | 119.0 (2) | C22—C27—C26 | 120.5 (3) |
C5—C6—C7 | 119.3 (3) | C29—C28—C33 | 121.2 (2) |
C6—C7—C8 | 119.6 (3) | N6—C29—C28 | 123.3 (2) |
C7—C8—C9 | 121.3 (3) | N6—C29—C30 | 116.9 (2) |
C8—C9—C10 | 120.1 (3) | C28—C29—C30 | 119.8 (3) |
C5—C10—C9 | 120.2 (3) | O5—C30—C29 | 115.4 (3) |
C12—C11—C16 | 121.3 (2) | O5—C30—C31 | 125.2 (2) |
N1—C12—C11 | 123.5 (2) | C29—C30—C31 | 119.4 (3) |
N1—C12—C13 | 116.7 (2) | C30—C31—C32 | 120.2 (3) |
C11—C12—C13 | 119.8 (3) | C31—C32—C33 | 121.3 (3) |
O2—C13—C14 | 125.3 (2) | C28—C33—C32 | 118.2 (2) |
C12—C13—C14 | 119.1 (3) | C28—C33—C34 | 120.9 (2) |
O2—C13—C12 | 115.6 (3) | C32—C33—C34 | 121.0 (3) |
C13—C14—C15 | 120.5 (3) | C19—C20—H20 | 119.00 |
C14—C15—C16 | 120.9 (3) | C21—C20—H20 | 119.00 |
C15—C16—C17 | 120.4 (3) | C20—C21—H21 | 119.00 |
C11—C16—C15 | 118.5 (3) | C22—C21—H21 | 119.00 |
C11—C16—C17 | 121.1 (2) | C23—C24—H24 | 120.00 |
C4—C3—H3 | 119.00 | C25—C24—H24 | 120.00 |
C2—C3—H3 | 119.00 | C24—C25—H25 | 120.00 |
C5—C4—H4 | 119.00 | C26—C25—H25 | 120.00 |
C3—C4—H4 | 119.00 | C25—C26—H26 | 120.00 |
C6—C7—H7 | 120.00 | C27—C26—H26 | 120.00 |
C8—C7—H7 | 120.00 | C22—C27—H27 | 120.00 |
C7—C8—H8 | 119.00 | C26—C27—H27 | 120.00 |
C9—C8—H8 | 119.00 | C29—C28—H28 | 119.00 |
C8—C9—H9 | 120.00 | C33—C28—H28 | 119.00 |
C10—C9—H9 | 120.00 | C30—C31—H31 | 120.00 |
C5—C10—H10 | 120.00 | C32—C31—H31 | 120.00 |
C9—C10—H10 | 120.00 | C31—C32—H32 | 119.00 |
C16—C11—H11 | 119.00 | C33—C32—H32 | 119.00 |
C12—C11—H11 | 119.00 | C33—C34—H34A | 109.00 |
C13—C14—H14 | 120.00 | C33—C34—H34B | 109.00 |
C15—C14—H14 | 120.00 | C33—C34—H34C | 109.00 |
C14—C15—H15 | 120.00 | H34A—C34—H34B | 109.00 |
C16—C15—H15 | 120.00 | H34A—C34—H34C | 109.00 |
H17A—C17—H17C | 109.00 | H34B—C34—H34C | 109.00 |
| | | |
C12—N1—N2—C1 | −179.4 (3) | O2—C13—C14—C15 | 177.8 (3) |
N2—N1—C12—C11 | −2.7 (4) | C12—C13—C14—C15 | −1.7 (5) |
N2—N1—C12—C13 | 178.8 (3) | C13—C14—C15—C16 | 1.7 (5) |
N1—N2—C1—C2 | −2.1 (4) | C14—C15—C16—C17 | −178.7 (3) |
N1—N2—C1—C6 | 177.4 (2) | C14—C15—C16—C11 | −0.2 (4) |
N6—N5—C18—C19 | −2.8 (4) | N5—C18—C19—O6 | −1.4 (4) |
N6—N5—C18—C23 | 175.7 (2) | N5—C18—C19—C20 | 179.1 (3) |
C18—N5—N6—C29 | −179.7 (3) | C23—C18—C19—O6 | −179.9 (3) |
N5—N6—C29—C28 | −2.5 (4) | C23—C18—C19—C20 | 0.6 (4) |
N5—N6—C29—C30 | 178.2 (3) | N5—C18—C23—C22 | −176.8 (3) |
N2—C1—C6—C5 | −176.5 (3) | N5—C18—C23—C24 | 2.6 (4) |
N2—C1—C6—C7 | 2.7 (4) | C19—C18—C23—C22 | 1.8 (4) |
N2—C1—C2—O1 | −2.6 (4) | C19—C18—C23—C24 | −178.8 (3) |
N2—C1—C2—C3 | 177.7 (3) | O6—C19—C20—C21 | 177.9 (3) |
C6—C1—C2—O1 | 177.9 (3) | C18—C19—C20—C21 | −2.7 (4) |
C6—C1—C2—C3 | −1.9 (4) | C19—C20—C21—C22 | 2.3 (5) |
C2—C1—C6—C5 | 3.1 (4) | C20—C21—C22—C23 | 0.3 (4) |
C2—C1—C6—C7 | −177.7 (3) | C20—C21—C22—C27 | 179.3 (3) |
C1—C2—C3—C4 | −0.3 (4) | C21—C22—C23—C18 | −2.3 (4) |
O1—C2—C3—C4 | 180.0 (3) | C21—C22—C23—C24 | 178.3 (3) |
C2—C3—C4—C5 | 1.2 (5) | C27—C22—C23—C18 | 178.7 (3) |
C3—C4—C5—C6 | 0.0 (5) | C27—C22—C23—C24 | −0.8 (4) |
C3—C4—C5—C10 | 178.7 (3) | C21—C22—C27—C26 | −178.4 (3) |
C4—C5—C6—C7 | 178.6 (3) | C23—C22—C27—C26 | 0.6 (5) |
C4—C5—C6—C1 | −2.2 (4) | C18—C23—C24—C25 | −178.7 (3) |
C10—C5—C6—C7 | −0.1 (4) | C22—C23—C24—C25 | 0.8 (4) |
C4—C5—C10—C9 | −178.8 (3) | C23—C24—C25—C26 | −0.6 (5) |
C10—C5—C6—C1 | 179.1 (3) | C24—C25—C26—C27 | 0.5 (5) |
C6—C5—C10—C9 | −0.1 (5) | C25—C26—C27—C22 | −0.5 (5) |
C5—C6—C7—C8 | 0.4 (4) | C33—C28—C29—N6 | −177.9 (3) |
C1—C6—C7—C8 | −178.8 (3) | C33—C28—C29—C30 | 1.4 (4) |
C6—C7—C8—C9 | −0.4 (5) | C29—C28—C33—C32 | 0.1 (4) |
C7—C8—C9—C10 | 0.1 (5) | C29—C28—C33—C34 | 179.4 (3) |
C8—C9—C10—C5 | 0.2 (5) | N6—C29—C30—O5 | −1.6 (4) |
C16—C11—C12—N1 | −177.3 (3) | N6—C29—C30—C31 | 177.7 (3) |
C12—C11—C16—C17 | 177.2 (3) | C28—C29—C30—O5 | 179.1 (3) |
C12—C11—C16—C15 | −1.3 (4) | C28—C29—C30—C31 | −1.6 (4) |
C16—C11—C12—C13 | 1.2 (4) | O5—C30—C31—C32 | 179.4 (3) |
N1—C12—C13—C14 | 178.9 (3) | C29—C30—C31—C32 | 0.2 (4) |
N1—C12—C13—O2 | −0.6 (4) | C30—C31—C32—C33 | 1.4 (5) |
C11—C12—C13—C14 | 0.3 (4) | C31—C32—C33—C28 | −1.5 (4) |
C11—C12—C13—O2 | −179.3 (3) | C31—C32—C33—C34 | 179.2 (3) |
Symmetry codes: (i) x+1/2, −y+1/2, z; (ii) x−1/2, −y+1/2, z; (iii) x, y−1, z; (iv) x, y+1, z; (v) x+1/2, −y+3/2, z; (vi) −x+3/2, y+3/2, −z+1; (vii) −x+3/2, y+1/2, −z+2; (viii) x−1/2, −y+3/2, z; (ix) −x+3/2, y−3/2, −z+2; (x) −x+3/2, y−3/2, −z+1; (xi) −x+3/2, y−1/2, −z+2; (xii) −x+3/2, y+3/2, −z+2. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O1 | 0.88 (2) | 1.82 (3) | 2.536 (4) | 138 (2) |
O2—H2···O6 | 0.82 | 1.85 | 2.631 (3) | 159 |
O5—H5···O1ii | 0.82 | 1.81 | 2.622 (3) | 168 |
N6—H6···O6 | 0.88 (2) | 1.82 (3) | 2.546 (4) | 138 (2) |
Symmetry code: (ii) x−1/2, −y+1/2, z. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O1 | 0.88 (2) | 1.82 (3) | 2.536 (4) | 138 (2) |
O2—H2···O6 | 0.82 | 1.85 | 2.631 (3) | 159 |
O5—H5···O1i | 0.82 | 1.81 | 2.622 (3) | 168 |
N6—H6···O6 | 0.88 (2) | 1.82 (3) | 2.546 (4) | 138 (2) |
Symmetry code: (i) x−1/2, −y+1/2, z. |
Azo compounds are very important in the fields of dyes, pigments and advanced materials (Lee et al., 2004). Azo dyes are synthetic colours that contain an azo group, as part of the structure. We are involved in the color generation mechanism of azo pigments typically characterized by the chromophore of the azo group (–N=N–). However, some types of azo pigments are also known to possess the hydrazone structure (=N–NH–), often leading to the formation of intramolecular hydrogen bonds (Herbst & Hunger 2004). The azo– hydrazone tautomerism in azo dyes has been known for more than a hundred years and is directly connected with the presence of at least one protic donor group in conjugation to the azo bridge (i.e. 2-naphthol) (Olivieri et al.., 1989). In particular, azo dyes that contain a naphtholic hydroxy group conjugated with the azo linkage exist in aqueous solution as an equilibrium mixture of two chemically distinct tautomers, the azo or hydrazone forms (Oakes, 2002).It is suggested that in a real azo compound the N=N double bond should have a length of 1.20–1.28 Å and the bond length of N–N single bonds, as in hydrazone tautomers, should be more than 1.4 Å. In the title compound, N–N bond lengths are 1.385 Å for N1–N2 and 1.305 Å for N5–N6, between the suggested N=N double bond and N–N single bond lengths.In the molecule, all bond lengths are in good agreement with those reported for other azo compounds (Yazıcı et al., 2010; Karadayı et al., 2006).
The molecular structure of the title compound is shown in Figure 1.There are two independent molecules in the asymmetric unit, each consists of a benzene ring linked to the first nitrogen atom of the N = N chromophore and two aromatic rings of the core 2-naphthol, with a trans configuration with respect to the azo double bond. The dihedral angles between the benzene ring and naphthalene ring system being 4.39 (12)° in one molecule and 5.83 (12)° in the other. Intramolecular N—H···O hydrogen bonds stabilize the planar geommetry in each of the independent molecules. In the crystal, the molecules are linked through O—H···O into infinite one-dimensional chains running along the a axis, Figure 2. In addition, the chains are stacked along the b axis via π-π interactions between the benzene and the naphthalene rings of adjacent molecules, the centroid-centroid distances being 3.722 (3) and 3.823 (4) Å.