Literature DB >> 21583567

5,5'-Di-4-pyridyl-2,2'-(5-tert-butyl-m-phenyl-ene)bis-(1,3,4-oxadiazole).

Katsuhiko Ono, Kenichi Tsukamoto, Masaaki Tomura.   

Abstract

The title compound, C(24)H(20)N(6)O(2), is a novel 1,3,4-oxadiazole derivative which has potential as an electron-transporting material in organic electroluminescent (EL) devices. In the crystal, the mol-ecular framework is almost planar with an r.m.s. deviation of 0.091 (4) Å and it exists in an E form. Intra-molecular C-H⋯O and C-H⋯N hydrogen bonds are observed between the benzene and 1,3,4-oxadiazole rings. The tert-butyl group is disordered over two sites, with occupancy factors of 0.78 (1) and 0.22 (1) for the major and minor orientations, respectively. In the crystal structure, mol-ecules aggregate via C-H⋯N inter-actions, forming mol-ecular tapes along the b axis, which aggregate to form a mol-ecular sheet via C-H⋯N inter-actions.

Entities:  

Year:  2009        PMID: 21583567      PMCID: PMC2977492          DOI: 10.1107/S1600536809027056

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

The application of 1,3,4-oxadiazole derivatives as electron-transporting materials in EL devices has been reported by Hughes & Bryce (2005 ▶). For related structures, including the 1,3,4-oxadiazole system, see: Ono et al.(2005 ▶, 2008 ▶).

Experimental

Crystal data

C24H20N6O2 M = 424.46 Monoclinic, a = 5.8778 (10) Å b = 14.767 (3) Å c = 25.298 (6) Å β = 90.635 (10)° V = 2195.7 (8) Å3 Z = 4 Mo Kα radiation μ = 0.09 mm−1 T = 296 K 0.25 × 0.13 × 0.10 mm

Data collection

Rigaku Mercury CCD diffractometer Absorption correction: none 16667 measured reflections 4956 independent reflections 1548 reflections with I > 2σ(I) R int = 0.112

Refinement

R[F 2 > 2σ(F 2)] = 0.070 wR(F 2) = 0.172 S = 0.90 4956 reflections 323 parameters 16 restraints H-atom parameters constrained Δρmax = 0.23 e Å−3 Δρmin = −0.13 e Å−3 Data collection: CrystalClear (Rigaku/MSC, 2006 ▶); cell refinement: CrystalClear; data reduction: TEXSAN (Rigaku/MSC, 2004 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: PLATON (Spek, 2009 ▶) and Mercury (Macrae et al., 2006 ▶); software used to prepare material for publication: SHELXL97. Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536809027056/rn2057sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536809027056/rn2057Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C24H20N6O2F(000) = 888
Mr = 424.46Dx = 1.284 Mg m3
Monoclinic, P21/cMelting point: 529 K
Hall symbol: -P 2ybcMo Kα radiation, λ = 0.71070 Å
a = 5.8778 (10) ÅCell parameters from 1816 reflections
b = 14.767 (3) Åθ = 3.2–27.5°
c = 25.298 (6) ŵ = 0.09 mm1
β = 90.635 (10)°T = 296 K
V = 2195.7 (8) Å3Prism, yellow
Z = 40.25 × 0.13 × 0.10 mm
Rigaku Mercury CCD diffractometer1548 reflections with I > 2σ(I)
Radiation source: rotating anodeRint = 0.112
graphite monochromatorθmax = 27.5°, θmin = 3.2°
Detector resolution: 14.62 pixels mm-1h = −5→7
φ and ω scansk = −19→14
16667 measured reflectionsl = −32→22
4956 independent reflections
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.070Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.172H-atom parameters constrained
S = 0.90w = 1/[σ2(Fo2) + (0.0474P)2] where P = (Fo2 + 2Fc2)/3
4956 reflections(Δ/σ)max = 0.004
323 parametersΔρmax = 0.23 e Å3
16 restraintsΔρmin = −0.13 e Å3
Experimental. 1H NMR (DMSO-d6, δ p.p.m.): 1.46 (s, 9H), 8.15 (d, J = 5.5 Hz, 4H), 8.36 (s, 2H), 8.61 (s, 1H), 8.88 (d, J = 5.5 Hz, 4H); MS (EI): m/z 424 (M+), 409.
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. Three methyl groups of the tert-butyl group are disordered over two sites (C22–C24 and C25–C27) with occupancies of 0.78 (1):0.22 (1). The values were determined by refining site occupancies.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.
xyzUiso*/UeqOcc. (<1)
O10.3004 (4)0.22049 (16)0.28302 (10)0.0597 (7)
O2−0.4436 (4)0.45678 (17)0.41002 (9)0.0615 (8)
N10.4194 (5)0.3569 (2)0.26015 (14)0.0762 (11)
N20.2304 (5)0.3662 (2)0.29375 (13)0.0731 (11)
N30.9831 (6)0.1428 (3)0.17039 (15)0.0904 (12)
N4−0.6818 (5)0.3527 (2)0.43895 (13)0.0726 (10)
N5−0.7648 (5)0.4388 (2)0.45273 (14)0.0734 (11)
N6−0.6473 (7)0.7838 (2)0.45477 (15)0.0903 (12)
C1−0.2506 (6)0.1407 (3)0.37961 (15)0.0586 (11)
C2−0.0691 (6)0.1670 (2)0.34870 (15)0.0587 (11)
H20.02400.12280.33420.070*
C3−0.0221 (6)0.2581 (2)0.33868 (15)0.0541 (10)
C4−0.1606 (6)0.3249 (3)0.36019 (14)0.0584 (11)
H4−0.13000.38580.35400.070*
C5−0.3437 (6)0.3001 (2)0.39072 (14)0.0537 (11)
C6−0.3841 (6)0.2088 (3)0.40024 (15)0.0620 (11)
H6−0.50620.19290.42140.074*
C70.1671 (6)0.2853 (3)0.30558 (15)0.0588 (11)
C80.4546 (7)0.2716 (3)0.25547 (16)0.0592 (11)
C90.6312 (6)0.2249 (3)0.22503 (15)0.0587 (11)
C100.6450 (7)0.1324 (3)0.22164 (16)0.0752 (13)
H100.53670.09570.23750.090*
C110.8243 (8)0.0949 (3)0.19406 (18)0.0893 (16)
H110.83340.03210.19210.107*
C120.9652 (7)0.2322 (4)0.17330 (18)0.0845 (15)
H121.07370.26720.15630.101*
C130.7938 (7)0.2763 (3)0.20023 (15)0.0716 (13)
H130.78870.33920.20150.086*
C14−0.4945 (7)0.3669 (3)0.41435 (15)0.0587 (11)
C15−0.6198 (6)0.4971 (3)0.43581 (14)0.0571 (11)
C16−0.6269 (6)0.5958 (3)0.44115 (14)0.0577 (11)
C17−0.8051 (6)0.6360 (3)0.46777 (15)0.0709 (13)
H17−0.92100.60090.48190.085*
C18−0.8076 (7)0.7293 (3)0.47298 (17)0.0782 (14)
H18−0.92970.75540.49040.094*
C19−0.4754 (8)0.7431 (3)0.42957 (19)0.0953 (16)
H19−0.36010.77960.41640.114*
C20−0.4581 (7)0.6506 (3)0.42176 (16)0.0746 (13)
H20−0.33520.62610.40380.090*
C21−0.2996 (7)0.0404 (3)0.3923 (2)0.0689 (12)
C22−0.2044 (17)0.0225 (5)0.4471 (3)0.104 (3)0.781 (13)
H22A−0.28420.05880.47240.156*0.781 (13)
H22B−0.04570.03770.44820.156*0.781 (13)
H22C−0.2231−0.04040.45570.156*0.781 (13)
C23−0.5473 (10)0.0201 (4)0.3857 (5)0.138 (6)0.781 (13)
H23A−0.5737−0.04290.39250.207*0.781 (13)
H23B−0.59460.03420.35020.207*0.781 (13)
H23C−0.63290.05610.41000.207*0.781 (13)
C24−0.1655 (15)−0.0238 (4)0.3541 (3)0.092 (3)0.781 (13)
H24A−0.2110−0.08540.36000.139*0.781 (13)
H24B−0.0051−0.01790.36090.139*0.781 (13)
H24C−0.1984−0.00740.31810.139*0.781 (13)
C25−0.393 (5)−0.0078 (13)0.3436 (7)0.080 (11)0.219 (13)
H25A−0.5298−0.03980.35260.121*0.219 (13)
H25B−0.2824−0.05000.33090.121*0.219 (13)
H25C−0.42700.03580.31650.121*0.219 (13)
C26−0.116 (6)−0.0169 (19)0.419 (2)0.20 (3)0.219 (13)
H26A−0.1786−0.04670.44920.303*0.219 (13)
H26B0.00770.02120.42980.303*0.219 (13)
H26C−0.0624−0.06140.39430.303*0.219 (13)
C27−0.483 (5)0.0375 (17)0.4371 (11)0.125 (15)0.219 (13)
H27A−0.61500.07140.42610.187*0.219 (13)
H27B−0.42110.06360.46890.187*0.219 (13)
H27C−0.5261−0.02420.44370.187*0.219 (13)
U11U22U33U12U13U23
O10.0732 (17)0.0460 (16)0.0602 (18)0.0062 (14)0.0133 (14)0.0036 (14)
O20.0596 (17)0.0577 (18)0.0676 (19)−0.0027 (14)0.0171 (14)−0.0041 (15)
N10.086 (3)0.051 (2)0.092 (3)0.002 (2)0.025 (2)0.013 (2)
N20.077 (2)0.051 (2)0.092 (3)0.0021 (19)0.030 (2)0.010 (2)
N30.099 (3)0.086 (3)0.087 (3)0.008 (3)0.022 (2)−0.001 (3)
N40.069 (2)0.064 (2)0.085 (3)−0.0093 (19)0.021 (2)−0.009 (2)
N50.066 (2)0.066 (2)0.089 (3)−0.008 (2)0.027 (2)−0.006 (2)
N60.119 (3)0.067 (3)0.086 (3)0.000 (2)0.030 (2)−0.004 (2)
C10.061 (3)0.052 (3)0.063 (3)−0.004 (2)−0.001 (2)0.000 (2)
C20.062 (3)0.048 (3)0.065 (3)0.0057 (19)0.000 (2)−0.007 (2)
C30.059 (3)0.045 (2)0.058 (3)0.003 (2)0.005 (2)−0.001 (2)
C40.066 (3)0.052 (3)0.057 (3)−0.006 (2)−0.001 (2)0.002 (2)
C50.062 (3)0.047 (3)0.052 (3)−0.004 (2)0.006 (2)−0.005 (2)
C60.060 (3)0.068 (3)0.059 (3)−0.014 (2)0.007 (2)0.005 (2)
C70.066 (3)0.050 (3)0.060 (3)0.002 (2)0.009 (2)0.007 (2)
C80.069 (3)0.054 (3)0.055 (3)−0.006 (2)0.011 (2)0.019 (2)
C90.073 (3)0.058 (3)0.046 (3)0.002 (2)0.009 (2)0.005 (2)
C100.099 (3)0.059 (3)0.068 (3)0.002 (3)0.023 (3)0.001 (3)
C110.116 (4)0.066 (3)0.086 (4)0.015 (3)0.026 (3)−0.001 (3)
C120.087 (4)0.081 (4)0.086 (4)−0.002 (3)0.026 (3)0.009 (3)
C130.086 (3)0.054 (3)0.075 (3)0.001 (2)0.015 (3)0.009 (2)
C140.065 (3)0.050 (3)0.062 (3)−0.008 (2)0.006 (2)−0.003 (2)
C150.053 (3)0.063 (3)0.056 (3)−0.002 (2)0.014 (2)−0.006 (2)
C160.063 (3)0.065 (3)0.045 (3)−0.001 (2)0.011 (2)−0.002 (2)
C170.069 (3)0.072 (3)0.073 (3)−0.004 (2)0.019 (2)−0.007 (3)
C180.086 (3)0.068 (3)0.081 (3)0.013 (3)0.019 (3)−0.007 (3)
C190.116 (4)0.070 (4)0.101 (4)−0.008 (3)0.040 (3)0.005 (3)
C200.078 (3)0.068 (3)0.079 (3)−0.002 (3)0.028 (2)0.001 (3)
C210.077 (3)0.045 (3)0.086 (4)0.002 (2)0.011 (3)0.010 (3)
C220.154 (9)0.051 (5)0.107 (7)0.007 (5)−0.004 (6)0.027 (5)
C230.056 (4)0.052 (5)0.305 (19)−0.018 (3)−0.024 (7)0.032 (8)
C240.123 (8)0.046 (4)0.108 (6)−0.020 (4)0.003 (6)−0.009 (4)
C250.13 (3)0.044 (13)0.065 (16)−0.022 (16)−0.008 (16)0.002 (11)
C260.22 (4)0.06 (2)0.32 (8)0.04 (2)−0.17 (5)−0.01 (3)
C270.21 (4)0.09 (2)0.07 (2)−0.05 (2)0.02 (2)−0.013 (17)
O1—C71.366 (4)C13—H130.9300
O1—C81.375 (4)C15—C161.465 (5)
O2—C151.367 (4)C16—C171.385 (4)
O2—C141.365 (4)C16—C201.375 (5)
N1—C81.282 (4)C17—C181.384 (5)
N1—N21.413 (4)C17—H170.9300
N2—C71.287 (4)C18—H180.9300
N3—C111.320 (5)C19—C201.384 (5)
N3—C121.326 (5)C19—H190.9300
N4—C141.288 (4)C20—H200.9300
N4—N51.407 (4)C21—C221.513 (7)
N5—C151.288 (4)C21—C231.494 (6)
N6—C181.326 (4)C21—C241.573 (6)
N6—C191.343 (5)C21—C251.523 (13)
C1—C21.385 (5)C21—C261.521 (14)
C1—C61.382 (5)C21—C271.575 (11)
C1—C211.542 (5)C22—H22A0.9600
C2—C31.396 (4)C22—H22B0.9600
C2—H20.9300C22—H22C0.9600
C3—C41.394 (4)C23—H23A0.9600
C3—C71.456 (5)C23—H23B0.9600
C4—C51.381 (4)C23—H23C0.9600
C4—H40.9300C24—H24A0.9600
C5—C61.390 (4)C24—H24B0.9600
C5—C141.458 (4)C24—H24C0.9600
C6—H60.9300C25—H25A0.9600
C8—C91.471 (5)C25—H25B0.9600
C9—C131.377 (4)C25—H25C0.9600
C9—C101.371 (5)C26—H26A0.9600
C10—C111.386 (5)C26—H26B0.9600
C10—H100.9300C26—H26C0.9600
C11—H110.9300C27—H27A0.9600
C12—C131.384 (5)C27—H27B0.9600
C12—H120.9300C27—H27C0.9600
C7—O1—C8102.2 (3)N5—C15—C16128.0 (4)
C15—O2—C14102.5 (3)O2—C15—C16120.0 (3)
C8—N1—N2106.3 (3)C17—C16—C20118.3 (4)
C7—N2—N1106.3 (3)C17—C16—C15119.6 (4)
C11—N3—C12116.8 (4)C20—C16—C15122.1 (4)
C14—N4—N5105.9 (3)C16—C17—C18118.8 (4)
C15—N5—N4106.8 (3)C16—C17—H17120.6
C18—N6—C19115.7 (4)C18—C17—H17120.6
C2—C1—C6116.9 (4)N6—C18—C17124.3 (4)
C2—C1—C21122.3 (4)N6—C18—H18117.9
C6—C1—C21120.8 (3)C17—C18—H18117.9
C1—C2—C3121.9 (3)N6—C19—C20124.5 (4)
C1—C2—H2119.0N6—C19—H19117.7
C3—C2—H2119.0C20—C19—H19117.7
C4—C3—C2119.5 (3)C16—C20—C19118.4 (4)
C4—C3—C7118.8 (3)C16—C20—H20120.8
C2—C3—C7121.7 (3)C19—C20—H20120.8
C5—C4—C3119.5 (4)C23—C21—C22114.7 (6)
C5—C4—H4120.2C23—C21—C1110.7 (4)
C3—C4—H4120.2C22—C21—C1106.9 (4)
C4—C5—C6119.3 (3)C23—C21—C24107.7 (6)
C4—C5—C14122.0 (4)C22—C21—C24106.0 (5)
C6—C5—C14118.6 (3)C1—C21—C24110.8 (4)
C5—C6—C1122.8 (3)C21—C22—H22A109.4
C5—C6—H6118.6C21—C22—H22B109.5
C1—C6—H6118.6C21—C22—H22C109.5
N2—C7—O1112.6 (3)C21—C23—H23A109.5
N2—C7—C3127.9 (4)C21—C23—H23B109.4
O1—C7—C3119.4 (3)C21—C23—H23C109.5
N1—C8—O1112.6 (3)C21—C24—H24A109.5
N1—C8—C9128.7 (3)C21—C24—H24B109.5
O1—C8—C9118.7 (3)C21—C24—H24C109.5
C13—C9—C10118.6 (4)C21—C25—H25A109.6
C13—C9—C8118.5 (4)C21—C25—H25B109.4
C10—C9—C8122.9 (4)H25A—C25—H25B109.5
C9—C10—C11118.4 (4)C21—C25—H25C109.5
C9—C10—H10120.8H25A—C25—H25C109.5
C11—C10—H10120.8H25B—C25—H25C109.5
N3—C11—C10124.0 (4)C21—C26—H26A109.3
N3—C11—H11118.0C21—C26—H26B109.5
C10—C11—H11118.0H26A—C26—H26B109.5
N3—C12—C13123.6 (4)C21—C26—H26C109.6
N3—C12—H12118.2H26A—C26—H26C109.5
C13—C12—H12118.2H26B—C26—H26C109.5
C9—C13—C12118.5 (4)C21—C27—H27A109.4
C9—C13—H13120.7C21—C27—H27B109.6
C12—C13—H13120.7H27A—C27—H27B109.5
N4—C14—O2112.7 (3)C21—C27—H27C109.5
N4—C14—C5127.9 (4)H27A—C27—H27C109.5
O2—C14—C5119.3 (3)H27B—C27—H27C109.5
N5—C15—O2112.0 (4)
C8—N1—N2—C7−0.9 (5)C11—N3—C12—C131.2 (8)
C14—N4—N5—C15−0.7 (4)C10—C9—C13—C12−0.5 (6)
C6—C1—C2—C30.0 (6)C8—C9—C13—C12177.5 (4)
C21—C1—C2—C3−178.1 (4)N3—C12—C13—C9−0.7 (7)
C1—C2—C3—C40.0 (6)N5—N4—C14—O2−0.3 (5)
C1—C2—C3—C7−179.2 (4)N5—N4—C14—C5−178.5 (4)
C2—C3—C4—C5−0.6 (6)C15—O2—C14—N41.1 (4)
C7—C3—C4—C5178.6 (4)C15—O2—C14—C5179.4 (3)
C3—C4—C5—C61.2 (6)C4—C5—C14—N4172.5 (4)
C3—C4—C5—C14179.9 (4)C6—C5—C14—N4−8.7 (6)
C4—C5—C6—C1−1.2 (6)C4—C5—C14—O2−5.5 (6)
C14—C5—C6—C1−180.0 (4)C6—C5—C14—O2173.2 (3)
C2—C1—C6—C50.6 (6)N4—N5—C15—O21.4 (5)
C21—C1—C6—C5178.7 (4)N4—N5—C15—C16−178.9 (4)
N1—N2—C7—O10.7 (5)C14—O2—C15—N5−1.5 (4)
N1—N2—C7—C3−179.2 (4)C14—O2—C15—C16178.7 (4)
C8—O1—C7—N2−0.2 (4)N5—C15—C16—C170.9 (7)
C8—O1—C7—C3179.7 (4)O2—C15—C16—C17−179.4 (3)
C4—C3—C7—N21.7 (7)N5—C15—C16—C20179.0 (4)
C2—C3—C7—N2−179.1 (4)O2—C15—C16—C20−1.3 (6)
C4—C3—C7—O1−178.2 (3)C20—C16—C17—C181.0 (6)
C2—C3—C7—O11.0 (6)C15—C16—C17—C18179.2 (4)
N2—N1—C8—O10.9 (5)C19—N6—C18—C170.5 (7)
N2—N1—C8—C9−179.8 (4)C16—C17—C18—N6−1.1 (7)
C7—O1—C8—N1−0.5 (5)C18—N6—C19—C200.2 (8)
C7—O1—C8—C9−179.9 (3)C17—C16—C20—C19−0.4 (6)
N1—C8—C9—C134.7 (7)C15—C16—C20—C19−178.5 (4)
O1—C8—C9—C13−176.0 (4)N6—C19—C20—C16−0.3 (8)
N1—C8—C9—C10−177.4 (5)C2—C1—C21—C23−135.0 (7)
O1—C8—C9—C101.9 (6)C6—C1—C21—C2347.0 (8)
C13—C9—C10—C111.0 (7)C2—C1—C21—C2299.4 (6)
C8—C9—C10—C11−176.9 (4)C6—C1—C21—C22−78.6 (6)
C12—N3—C11—C10−0.7 (7)C2—C1—C21—C24−15.6 (7)
C9—C10—C11—N3−0.4 (7)C6—C1—C21—C24166.4 (5)
D—H···AD—HH···AD···AD—H···A
C2—H2···O10.932.542.860 (4)101
C6—H6···N40.932.612.928 (5)100
C11—H11···N2i0.932.503.406 (6)164
C17—H17···N5ii0.932.563.430 (5)156
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
C2—H2⋯O10.932.542.860 (4)101
C6—H6⋯N40.932.612.928 (5)100
C11—H11⋯N2i0.932.503.406 (6)164
C17—H17⋯N5ii0.932.563.430 (5)156

Symmetry codes: (i) ; (ii) .

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Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

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Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
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