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The title compound, C19H20O6, is composed of two individual vanillin subunits bonded to a central chain of C atoms. The mol­ecule lies on a twofold rotation axis. The two aromatic rings are approximately perpendicular to each other and both make a dihedral angle of 53.36 (4)° with the backbone chain. A weak C—H...π inter­action consolidates the crystal packing.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536805034665/at6046sup1.cif
Contains datablocks I, global

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536805034665/at6046Isup2.hkl
Contains datablock I

CCDC reference: 293812

Key indicators

  • Single-crystal X-ray study
  • T = 294 K
  • Mean [sigma](C-C) = 0.003 Å
  • R factor = 0.031
  • wR factor = 0.074
  • Data-to-parameter ratio = 8.2

checkCIF/PLATON results

No syntax errors found



Alert level G REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is correct. If it is not, please give the correct count in the _publ_section_exptl_refinement section of the submitted CIF. From the CIF: _diffrn_reflns_theta_max 26.18 From the CIF: _reflns_number_total 950 Count of symmetry unique reflns 950 Completeness (_total/calc) 100.00% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 0 Fraction of Friedel pairs measured 0.000 Are heavy atom types Z>Si present no
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 0 ALERT level C = Check and explain 1 ALERT level G = General alerts; check 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 0 ALERT type 2 Indicator that the structure model may be wrong or deficient 0 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion

Computing details top

Data collection: SMART (Bruker, 1999); cell refinement: SAINT (Bruker, 1999); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXTL.

3,3'-Dihydroxy-4,4'-(propane-1,3-diyldioxy)dibenzaldehyde top
Crystal data top
C19H20O6F(000) = 1456
Mr = 344.35Dx = 1.358 Mg m3
Orthorhombic, Fdd2Mo Kα radiation, λ = 0.71073 Å
Hall symbol: F 2 -2dCell parameters from 1884 reflections
a = 22.247 (5) Åθ = 2.3–26.1°
b = 31.175 (6) ŵ = 0.10 mm1
c = 4.8562 (10) ÅT = 294 K
V = 3368.1 (12) Å3Block, colorless
Z = 80.26 × 0.20 × 0.18 mm
Data collection top
Bruker SMART CCD area-detector
diffractometer
950 independent reflections
Radiation source: fine-focus sealed tube781 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.029
φ and ω scansθmax = 26.2°, θmin = 2.3°
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
h = 2027
Tmin = 0.964, Tmax = 0.982k = 3837
4635 measured reflectionsl = 64
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.031H-atom parameters constrained
wR(F2) = 0.074 w = 1/[σ2(Fo2) + (0.0299P)2 + 1.8179P]
where P = (Fo2 + 2Fc2)/3
S = 1.10(Δ/σ)max = 0.001
950 reflectionsΔρmax = 0.13 e Å3
116 parametersΔρmin = 0.12 e Å3
1 restraintExtinction correction: SHELXL97, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.0028 (3)
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 > 2σ(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
xyzUiso*/UeqOcc. (<1)
O10.42750 (6)0.02013 (4)0.8424 (3)0.0445 (4)
O20.34941 (7)0.01229 (4)0.5072 (4)0.0551 (5)
O30.26282 (8)0.11871 (6)0.0181 (5)0.0743 (6)
C10.39797 (9)0.04880 (6)0.6823 (4)0.0393 (5)
C20.35536 (9)0.03145 (6)0.4996 (5)0.0416 (5)
C30.32341 (9)0.05797 (7)0.3285 (5)0.0465 (6)
H30.29500.04650.20870.056*
C40.33354 (10)0.10218 (7)0.3342 (5)0.0479 (6)
C50.37533 (10)0.11902 (7)0.5116 (5)0.0512 (6)
H50.38200.14850.51420.061*
C60.40776 (9)0.09265 (6)0.6868 (5)0.0455 (6)
H60.43590.10430.80670.055*
C70.31500 (12)0.03134 (8)0.2927 (6)0.0642 (8)
H7A0.27430.02120.30280.096*
H7B0.31560.06200.31290.096*
H7C0.33190.02370.11760.096*
C80.30021 (11)0.13015 (8)0.1456 (6)0.0607 (7)
H80.30870.15930.15290.073*
C90.47513 (9)0.03657 (6)1.0128 (5)0.0441 (5)
H9A0.45980.05881.13390.053*
H9B0.50650.04890.89890.053*
C100.50000.00001.1796 (7)0.0449 (7)
H10A0.46840.01101.29770.054*0.50
H10B0.53160.01101.29770.054*0.50
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0496 (8)0.0415 (8)0.0424 (9)0.0021 (6)0.0054 (8)0.0009 (7)
O20.0673 (10)0.0414 (8)0.0565 (10)0.0076 (7)0.0153 (10)0.0046 (8)
O30.0685 (12)0.0748 (12)0.0797 (15)0.0166 (9)0.0061 (13)0.0175 (12)
C10.0419 (11)0.0417 (11)0.0342 (12)0.0025 (9)0.0080 (10)0.0016 (11)
C20.0451 (11)0.0401 (10)0.0395 (12)0.0003 (9)0.0060 (11)0.0031 (11)
C30.0446 (12)0.0508 (12)0.0442 (14)0.0014 (10)0.0014 (12)0.0029 (12)
C40.0501 (12)0.0454 (12)0.0482 (15)0.0085 (10)0.0126 (12)0.0079 (12)
C50.0610 (14)0.0385 (11)0.0541 (14)0.0037 (10)0.0143 (13)0.0023 (12)
C60.0514 (13)0.0426 (12)0.0426 (13)0.0020 (10)0.0062 (12)0.0031 (12)
C70.0764 (17)0.0498 (13)0.0666 (18)0.0127 (12)0.0139 (15)0.0001 (14)
C80.0607 (16)0.0539 (14)0.0673 (19)0.0117 (12)0.0117 (15)0.0121 (14)
C90.0463 (11)0.0459 (11)0.0401 (12)0.0039 (10)0.0002 (11)0.0058 (11)
C100.0468 (17)0.0535 (18)0.0344 (16)0.0036 (14)0.0000.000
Geometric parameters (Å, º) top
O1—C11.355 (2)C5—H50.9300
O1—C91.439 (2)C6—H60.9300
O2—C21.371 (2)C7—H7A0.9600
O2—C71.423 (3)C7—H7B0.9600
O3—C81.204 (3)C7—H7C0.9600
C1—C61.385 (3)C8—H80.9300
C1—C21.407 (3)C9—C101.504 (3)
C2—C31.371 (3)C9—H9A0.9700
C3—C41.397 (3)C9—H9B0.9700
C3—H30.9300C10—C9i1.504 (3)
C4—C51.372 (3)C10—H10A0.9700
C4—C81.466 (3)C10—H10B0.9700
C5—C61.386 (3)
C1—O1—C9116.87 (15)O2—C7—H7B109.5
C2—O2—C7116.59 (18)H7A—C7—H7B109.5
O1—C1—C6124.5 (2)O2—C7—H7C109.5
O1—C1—C2115.80 (17)H7A—C7—H7C109.5
C6—C1—C2119.71 (19)H7B—C7—H7C109.5
O2—C2—C3124.5 (2)O3—C8—C4125.8 (2)
O2—C2—C1115.52 (18)O3—C8—H8117.1
C3—C2—C1120.00 (18)C4—C8—H8117.1
C2—C3—C4120.0 (2)O1—C9—C10108.09 (15)
C2—C3—H3120.0O1—C9—H9A110.1
C4—C3—H3120.0C10—C9—H9A110.1
C5—C4—C3120.0 (2)O1—C9—H9B110.1
C5—C4—C8120.5 (2)C10—C9—H9B110.1
C3—C4—C8119.5 (2)H9A—C9—H9B108.4
C4—C5—C6120.7 (2)C9—C10—C9i114.8 (3)
C4—C5—H5119.6C9—C10—H10A108.6
C6—C5—H5119.6C9i—C10—H10A108.6
C1—C6—C5119.6 (2)C9—C10—H10B108.6
C1—C6—H6120.2C9i—C10—H10B108.6
C5—C6—H6120.2H10A—C10—H10B107.5
O2—C7—H7A109.5
C9—O1—C1—C64.8 (2)C2—C3—C4—C8178.50 (16)
C9—O1—C1—C2174.52 (14)C3—C4—C5—C60.3 (3)
C7—O2—C2—C310.6 (3)C8—C4—C5—C6178.86 (17)
C7—O2—C2—C1168.95 (16)O1—C1—C6—C5179.34 (16)
O1—C1—C2—O20.2 (2)C2—C1—C6—C50.0 (2)
C6—C1—C2—O2179.13 (15)C4—C5—C6—C10.3 (3)
O1—C1—C2—C3179.77 (16)C5—C4—C8—O3179.7 (2)
C6—C1—C2—C30.4 (2)C3—C4—C8—O31.1 (3)
O2—C2—C3—C4179.06 (16)C1—O1—C9—C10177.95 (14)
C1—C2—C3—C40.4 (3)O1—C9—C10—C9i59.39 (10)
C2—C3—C4—C50.1 (3)
Symmetry code: (i) x+1, y, z.
 

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