organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

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ISSN: 2056-9890

2-Ethyl-5-tri­phenyl­methyl-1,3-dioxane

aDepartment of Biology and Chemistry, Hunan University of Science and Engineering, Yongzhou Hunan 425100, People's Republic of China, and bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: seikweng@um.edu.my

(Received 9 September 2010; accepted 14 September 2010; online 18 September 2010)

In the title compound, C25H26O2, the dioxane ring adopts a chair conformation with the two substituent groups occupying equatorial positions.

Related literature

For the crystal structure of 2,2-dimethyl-5-triphenyl-1,3-dioxane, see: Zhang et al. (2009[Zhang, M., Yuan, X.-Y. & Liu, X.-M. (2009). Acta Cryst. E65, o304.]).

[Scheme 1]

Experimental

Crystal data
  • C25H26O2

  • Mr = 358.46

  • Monoclinic, P 21 /c

  • a = 10.5401 (6) Å

  • b = 13.3550 (8) Å

  • c = 14.6044 (8) Å

  • β = 110.523 (1)°

  • V = 1925.28 (19) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.08 mm−1

  • T = 110 K

  • 0.45 × 0.35 × 0.15 mm

Data collection
  • Bruker SMART APEX diffractometer

  • 9493 measured reflections

  • 4174 independent reflections

  • 3047 reflections with I > 2σ(I)

  • Rint = 0.031

Refinement
  • R[F2 > 2σ(F2)] = 0.042

  • wR(F2) = 0.114

  • S = 1.04

  • 4174 reflections

  • 244 parameters

  • H-atom parameters constrained

  • Δρmax = 0.29 e Å−3

  • Δρmin = −0.19 e Å−3

Data collection: SMART (Bruker, 2003[Bruker (2003). SAINT and SMART. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2003[Bruker (2003). SAINT and SMART. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: X-SEED (Barbour, 2001[Barbour, L. J. (2001). J. Supramol. Chem. 1, 189-191.]); software used to prepare material for publication: publCIF (Westrip, 2010[Westrip, S. P. (2010). J. Appl. Cryst. 43, 920-925.]).

Supporting information


Comment top

A previous study reported the crystal structure of 2,2-dimethyl-5-triphenylmethyl-1,3-dioxane (Zhang et al., 2009). Such disubstituted 1,3-dioxanes are known from NMR studies to have substituents in equatorial rather than in axial orientations on the six-membered ring. The the title compound, 2-ethyl-5-triphenylmethyl-1,3-dioxane analog (Scheme I, Fig. 1), has similar features for the dioxane part, which adopts a chair conformation. The substitutent groups occupy equatorial positions.

Related literature top

For the crystal structure of 2,2-dimethyl-5-triphenyl-1,3-dioxane, see: Zhang et al. (2009).

Experimental top

2-Triphenylmethyl-1,3-propanediol (0.24 g, 5.0 mmol), propionaldehyde (20 mmol) and p-toluenesulfonic acid (0.1 g) were stirred in dichloromethane (20 ml) for a week. The solvent was evaporated and the residue was dissolved in ether (20 ml) after which the solution was washed with water and 5% sodium bicarbonate (20 ml). The organic phase was dried with anhydrous sodium sulfate. The solvent was evaporated and the product was recrystallized from ethyl acetate to give 1.0 g (yield 60%) of colorless crystals.

Refinement top

Carbon-bound H-atoms were placed in calculated positions (C—H = 0.95–0.99 Å) and were included in the refinement in the riding model approximation, with Uiso(H) set to 1.2Ueq(C).

Computing details top

Data collection: SMART (Bruker, 2003); cell refinement: SAINT (Bruker, 2003); data reduction: SAINT (Bruker, 2003); 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: publCIF (Westrip, 2010).

Figures top
[Figure 1] Fig. 1. Thermal ellipsoid plot (Barbour, 2001) of the title compound at the 70% probability level.
2-Ethyl-5-triphenylmethyl-1,3-dioxane top
Crystal data top
C25H26O2F(000) = 768
Mr = 358.46Dx = 1.237 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 3994 reflections
a = 10.5401 (6) Åθ = 2.6–27.0°
b = 13.3550 (8) ŵ = 0.08 mm1
c = 14.6044 (8) ÅT = 110 K
β = 110.523 (1)°Block, colorless
V = 1925.28 (19) Å30.45 × 0.35 × 0.15 mm
Z = 4
Data collection top
Bruker SMART APEX
diffractometer
3047 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.031
Graphite monochromatorθmax = 27.1°, θmin = 2.1°
ω scansh = 913
9493 measured reflectionsk = 1712
4174 independent reflectionsl = 1818
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.042Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.114H-atom parameters constrained
S = 1.04 w = 1/[σ2(Fo2) + (0.0568P)2 + 0.2859P]
where P = (Fo2 + 2Fc2)/3
4174 reflections(Δ/σ)max = 0.001
244 parametersΔρmax = 0.29 e Å3
0 restraintsΔρmin = 0.19 e Å3
Crystal data top
C25H26O2V = 1925.28 (19) Å3
Mr = 358.46Z = 4
Monoclinic, P21/cMo Kα radiation
a = 10.5401 (6) ŵ = 0.08 mm1
b = 13.3550 (8) ÅT = 110 K
c = 14.6044 (8) Å0.45 × 0.35 × 0.15 mm
β = 110.523 (1)°
Data collection top
Bruker SMART APEX
diffractometer
3047 reflections with I > 2σ(I)
9493 measured reflectionsRint = 0.031
4174 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0420 restraints
wR(F2) = 0.114H-atom parameters constrained
S = 1.04Δρmax = 0.29 e Å3
4174 reflectionsΔρmin = 0.19 e Å3
244 parameters
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.30810 (9)0.32447 (7)0.08575 (6)0.0188 (2)
O20.26796 (9)0.32596 (7)0.23220 (7)0.0191 (2)
C10.71880 (14)0.43893 (10)0.23149 (9)0.0179 (3)
C20.65864 (15)0.52062 (11)0.17152 (10)0.0212 (3)
H20.56820.53890.16330.025*
C30.72914 (16)0.57512 (11)0.12403 (11)0.0258 (3)
H30.68640.63000.08350.031*
C40.86148 (16)0.55018 (12)0.13528 (11)0.0272 (4)
H40.90930.58720.10220.033*
C50.92283 (15)0.47091 (12)0.19517 (11)0.0249 (3)
H51.01370.45370.20380.030*
C60.85276 (14)0.41622 (11)0.24288 (10)0.0214 (3)
H60.89680.36220.28410.026*
C70.69636 (13)0.27847 (10)0.32337 (10)0.0196 (3)
C80.72962 (14)0.21427 (11)0.25990 (11)0.0242 (3)
H80.72840.23870.19850.029*
C90.76470 (15)0.11462 (12)0.28526 (13)0.0325 (4)
H90.78700.07190.24110.039*
C100.76718 (16)0.07774 (12)0.37422 (14)0.0361 (4)
H100.79140.01000.39150.043*
C110.73423 (16)0.13999 (12)0.43758 (13)0.0316 (4)
H110.73550.11500.49880.038*
C120.69899 (14)0.23933 (11)0.41254 (11)0.0239 (3)
H120.67630.28130.45700.029*
C130.67391 (13)0.45454 (10)0.38294 (9)0.0161 (3)
C140.80413 (14)0.45411 (11)0.45377 (10)0.0194 (3)
H140.87010.40910.44700.023*
C150.83889 (15)0.51776 (11)0.53341 (10)0.0226 (3)
H150.92780.51560.58070.027*
C160.74504 (15)0.58467 (11)0.54476 (10)0.0214 (3)
H160.76890.62870.59930.026*
C170.61592 (15)0.58622 (11)0.47519 (10)0.0202 (3)
H170.55040.63140.48240.024*
C180.58085 (14)0.52241 (10)0.39474 (10)0.0183 (3)
H180.49210.52530.34730.022*
C190.64436 (13)0.38587 (10)0.29220 (9)0.0162 (3)
C200.48869 (13)0.37838 (10)0.23326 (9)0.0163 (3)
H200.45280.44830.22050.020*
C210.45229 (13)0.32618 (11)0.13438 (10)0.0191 (3)
H21A0.49500.36200.09330.023*
H21B0.48760.25680.14400.023*
C220.41008 (13)0.32455 (11)0.28894 (10)0.0186 (3)
H22A0.44180.25450.30200.022*
H22B0.42630.35820.35250.022*
C230.24357 (14)0.27454 (11)0.14269 (9)0.0178 (3)
H23A0.27910.20460.15630.021*
C240.09327 (14)0.27184 (11)0.08743 (10)0.0207 (3)
H24A0.07580.24050.02270.025*
H24B0.05780.34120.07650.025*
C250.01923 (15)0.21322 (12)0.14283 (11)0.0261 (3)
H25A0.07820.21310.10510.039*
H25B0.03540.24470.20660.039*
H25C0.05280.14420.15250.039*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0172 (5)0.0204 (5)0.0174 (5)0.0028 (4)0.0042 (4)0.0008 (4)
O20.0159 (5)0.0221 (5)0.0181 (5)0.0013 (4)0.0044 (4)0.0033 (4)
C10.0206 (7)0.0169 (7)0.0162 (6)0.0041 (6)0.0063 (6)0.0047 (5)
C20.0219 (7)0.0204 (7)0.0207 (7)0.0027 (6)0.0068 (6)0.0014 (6)
C30.0340 (9)0.0213 (8)0.0204 (7)0.0075 (7)0.0076 (6)0.0004 (6)
C40.0339 (9)0.0294 (9)0.0226 (7)0.0150 (7)0.0152 (7)0.0060 (6)
C50.0219 (8)0.0283 (8)0.0267 (8)0.0083 (6)0.0113 (6)0.0099 (6)
C60.0224 (7)0.0198 (7)0.0218 (7)0.0034 (6)0.0076 (6)0.0056 (6)
C70.0137 (7)0.0143 (7)0.0275 (7)0.0004 (5)0.0031 (6)0.0001 (6)
C80.0158 (7)0.0200 (7)0.0330 (8)0.0008 (6)0.0039 (6)0.0045 (6)
C90.0188 (8)0.0197 (8)0.0509 (11)0.0021 (6)0.0019 (7)0.0099 (7)
C100.0217 (8)0.0151 (8)0.0569 (11)0.0009 (6)0.0045 (8)0.0038 (8)
C110.0225 (8)0.0232 (8)0.0393 (9)0.0026 (7)0.0016 (7)0.0110 (7)
C120.0196 (7)0.0192 (7)0.0287 (8)0.0020 (6)0.0034 (6)0.0038 (6)
C130.0191 (7)0.0122 (7)0.0176 (6)0.0023 (5)0.0072 (5)0.0021 (5)
C140.0175 (7)0.0193 (7)0.0218 (7)0.0001 (6)0.0074 (6)0.0014 (6)
C150.0197 (7)0.0250 (8)0.0208 (7)0.0045 (6)0.0042 (6)0.0001 (6)
C160.0278 (8)0.0189 (7)0.0187 (7)0.0053 (6)0.0096 (6)0.0028 (6)
C170.0252 (8)0.0160 (7)0.0213 (7)0.0012 (6)0.0106 (6)0.0028 (6)
C180.0190 (7)0.0168 (7)0.0182 (7)0.0001 (6)0.0053 (5)0.0024 (5)
C190.0160 (7)0.0139 (7)0.0178 (7)0.0002 (5)0.0047 (5)0.0006 (5)
C200.0158 (7)0.0152 (7)0.0166 (7)0.0005 (5)0.0042 (5)0.0003 (5)
C210.0165 (7)0.0203 (7)0.0200 (7)0.0014 (6)0.0059 (6)0.0020 (6)
C220.0151 (7)0.0217 (7)0.0175 (7)0.0013 (6)0.0039 (5)0.0006 (6)
C230.0200 (7)0.0150 (7)0.0185 (7)0.0011 (6)0.0067 (6)0.0012 (5)
C240.0198 (7)0.0196 (7)0.0204 (7)0.0001 (6)0.0042 (6)0.0022 (6)
C250.0193 (7)0.0286 (8)0.0286 (8)0.0044 (6)0.0064 (6)0.0006 (7)
Geometric parameters (Å, º) top
O1—C231.4125 (16)C13—C181.3899 (19)
O1—C211.4345 (15)C13—C141.3994 (19)
O2—C231.4181 (15)C13—C191.5509 (18)
O2—C221.4355 (15)C14—C151.382 (2)
C1—C61.3959 (19)C14—H140.9500
C1—C21.403 (2)C15—C161.385 (2)
C1—C191.5465 (19)C15—H150.9500
C2—C31.387 (2)C16—C171.384 (2)
C2—H20.9500C16—H160.9500
C3—C41.387 (2)C17—C181.3925 (19)
C3—H30.9500C17—H170.9500
C4—C51.381 (2)C18—H180.9500
C4—H40.9500C19—C201.5661 (18)
C5—C61.387 (2)C20—C211.5264 (18)
C5—H50.9500C20—C221.5287 (19)
C6—H60.9500C20—H201.0000
C7—C81.395 (2)C21—H21A0.9900
C7—C121.395 (2)C21—H21B0.9900
C7—C191.5459 (19)C22—H22A0.9900
C8—C91.396 (2)C22—H22B0.9900
C8—H80.9500C23—C241.5053 (18)
C9—C101.381 (3)C23—H23A1.0000
C9—H90.9500C24—C251.523 (2)
C10—C111.376 (2)C24—H24A0.9900
C10—H100.9500C24—H24B0.9900
C11—C121.392 (2)C25—H25A0.9800
C11—H110.9500C25—H25B0.9800
C12—H120.9500C25—H25C0.9800
C23—O1—C21111.18 (10)C15—C16—H16120.6
C23—O2—C22109.94 (10)C16—C17—C18120.80 (13)
C6—C1—C2117.39 (13)C16—C17—H17119.6
C6—C1—C19121.83 (12)C18—C17—H17119.6
C2—C1—C19120.33 (12)C13—C18—C17120.90 (13)
C3—C2—C1121.06 (14)C13—C18—H18119.6
C3—C2—H2119.5C17—C18—H18119.6
C1—C2—H2119.5C7—C19—C1113.28 (11)
C4—C3—C2120.50 (14)C7—C19—C13110.66 (11)
C4—C3—H3119.7C1—C19—C13103.22 (10)
C2—C3—H3119.7C7—C19—C20107.31 (11)
C5—C4—C3119.17 (14)C1—C19—C20111.01 (10)
C5—C4—H4120.4C13—C19—C20111.43 (11)
C3—C4—H4120.4C21—C20—C22106.57 (11)
C4—C5—C6120.53 (14)C21—C20—C19114.62 (11)
C4—C5—H5119.7C22—C20—C19113.35 (10)
C6—C5—H5119.7C21—C20—H20107.3
C5—C6—C1121.34 (14)C22—C20—H20107.3
C5—C6—H6119.3C19—C20—H20107.3
C1—C6—H6119.3O1—C21—C20110.30 (11)
C8—C7—C12117.57 (14)O1—C21—H21A109.6
C8—C7—C19121.37 (13)C20—C21—H21A109.6
C12—C7—C19120.78 (13)O1—C21—H21B109.6
C7—C8—C9120.98 (15)C20—C21—H21B109.6
C7—C8—H8119.5H21A—C21—H21B108.1
C9—C8—H8119.5O2—C22—C20109.71 (10)
C10—C9—C8120.36 (16)O2—C22—H22A109.7
C10—C9—H9119.8C20—C22—H22A109.7
C8—C9—H9119.8O2—C22—H22B109.7
C11—C10—C9119.42 (15)C20—C22—H22B109.7
C11—C10—H10120.3H22A—C22—H22B108.2
C9—C10—H10120.3O1—C23—O2110.18 (10)
C10—C11—C12120.42 (16)O1—C23—C24109.22 (11)
C10—C11—H11119.8O2—C23—C24108.81 (11)
C12—C11—H11119.8O1—C23—H23A109.5
C11—C12—C7121.26 (15)O2—C23—H23A109.5
C11—C12—H12119.4C24—C23—H23A109.5
C7—C12—H12119.4C23—C24—C25111.50 (11)
C18—C13—C14117.58 (12)C23—C24—H24A109.3
C18—C13—C19123.54 (12)C25—C24—H24A109.3
C14—C13—C19118.71 (12)C23—C24—H24B109.3
C15—C14—C13121.43 (13)C25—C24—H24B109.3
C15—C14—H14119.3H24A—C24—H24B108.0
C13—C14—H14119.3C24—C25—H25A109.5
C14—C15—C16120.50 (13)C24—C25—H25B109.5
C14—C15—H15119.8H25A—C25—H25B109.5
C16—C15—H15119.8C24—C25—H25C109.5
C17—C16—C15118.78 (13)H25A—C25—H25C109.5
C17—C16—H16120.6H25B—C25—H25C109.5
C6—C1—C2—C31.3 (2)C6—C1—C19—C728.71 (17)
C19—C1—C2—C3173.68 (12)C2—C1—C19—C7159.22 (12)
C1—C2—C3—C40.3 (2)C6—C1—C19—C1391.00 (14)
C2—C3—C4—C50.6 (2)C2—C1—C19—C1381.08 (14)
C3—C4—C5—C60.6 (2)C6—C1—C19—C20149.52 (12)
C4—C5—C6—C10.4 (2)C2—C1—C19—C2038.41 (16)
C2—C1—C6—C51.3 (2)C18—C13—C19—C7136.57 (13)
C19—C1—C6—C5173.61 (12)C14—C13—C19—C748.34 (16)
C12—C7—C8—C90.2 (2)C18—C13—C19—C1101.94 (14)
C19—C7—C8—C9174.13 (13)C14—C13—C19—C173.15 (14)
C7—C8—C9—C100.1 (2)C18—C13—C19—C2017.26 (17)
C8—C9—C10—C110.3 (2)C14—C13—C19—C20167.65 (12)
C9—C10—C11—C120.2 (2)C7—C19—C20—C2168.12 (14)
C10—C11—C12—C70.2 (2)C1—C19—C20—C2156.15 (15)
C8—C7—C12—C110.4 (2)C13—C19—C20—C21170.60 (11)
C19—C7—C12—C11174.28 (13)C7—C19—C20—C2254.53 (14)
C18—C13—C14—C150.9 (2)C1—C19—C20—C22178.81 (11)
C19—C13—C14—C15176.25 (12)C13—C19—C20—C2266.75 (14)
C13—C14—C15—C160.5 (2)C23—O1—C21—C2058.77 (14)
C14—C15—C16—C170.3 (2)C22—C20—C21—O154.60 (14)
C15—C16—C17—C180.5 (2)C19—C20—C21—O1179.15 (10)
C14—C13—C18—C171.1 (2)C23—O2—C22—C2061.61 (14)
C19—C13—C18—C17176.24 (12)C21—C20—C22—O256.23 (14)
C16—C17—C18—C130.9 (2)C19—C20—C22—O2176.77 (10)
C8—C7—C19—C139.96 (17)C21—O1—C23—O262.29 (13)
C12—C7—C19—C1146.35 (12)C21—O1—C23—C24178.24 (11)
C8—C7—C19—C13155.31 (12)C22—O2—C23—O163.62 (13)
C12—C7—C19—C1331.00 (17)C22—O2—C23—C24176.67 (11)
C8—C7—C19—C2082.92 (15)O1—C23—C24—C25176.55 (12)
C12—C7—C19—C2090.77 (15)O2—C23—C24—C2563.14 (15)

Experimental details

Crystal data
Chemical formulaC25H26O2
Mr358.46
Crystal system, space groupMonoclinic, P21/c
Temperature (K)110
a, b, c (Å)10.5401 (6), 13.3550 (8), 14.6044 (8)
β (°) 110.523 (1)
V3)1925.28 (19)
Z4
Radiation typeMo Kα
µ (mm1)0.08
Crystal size (mm)0.45 × 0.35 × 0.15
Data collection
DiffractometerBruker SMART APEX
diffractometer
Absorption correction
No. of measured, independent and
observed [I > 2σ(I)] reflections
9493, 4174, 3047
Rint0.031
(sin θ/λ)max1)0.640
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.042, 0.114, 1.04
No. of reflections4174
No. of parameters244
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.29, 0.19

Computer programs: SMART (Bruker, 2003), SAINT (Bruker, 2003), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2010).

 

Acknowledgements

We thank the Key Subject Construction Project of Hunan Province (No. 2006–180), the Key Scientific Research Project of Hunan Provincial Education Department (No. 08 A023, 05 C736), the NSF of Hunan Province (09 J J3028) and the University of Malaya for supporting this study.

References

First citationBarbour, L. J. (2001). J. Supramol. Chem. 1, 189–191.  CrossRef CAS Google Scholar
First citationBruker (2003). SAINT and SMART. Bruker AXS Inc., Madison, Wisconsin, USA.  Google Scholar
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