organic compounds
Diallyl 5-[(4-hexyloxyphenyl)iminomethyl]-m-phenylene dicarbonate
aCentro de Investigaciones en Materiales y Metalurgia, Universidad Autónoma del estado de Hidalgo, Carretera Pachuca Tulancingo Km 4.5, 42184 Mineral de la Reforma, Hgo., Mexico, bFacultad de Ciencias Químicas, Universidad Autónoma de Puebla, Boulevard 14 Sur, Col. San Manuel, 72570 Puebla, Pue., Mexico, and cDEP Facultad de Ciencias Químicas, UANL, Guerrero y Progreso S/N, Col. Treviño, 64570 Monterrey, N.L., Mexico
*Correspondence e-mail: sylvain_bernes@Hotmail.com
The title molecule, C27H31NO7, an imine derivative bearing both carbonate and allyl functionalities, was synthesized in the hope of obtaining a mesogenic polymerizable material. The allylcarbonate arms are fully disordered over two sets of sites, reflecting a large degree of rotational freedom about σ bonds [occupancies: 0.665 (9)/0.335 (9) for one substituent, 0.564 (9)/0.436 (9) for the other]. In contrast, the hexyl chain is ordered, and presents the common all-trans extended conformation. The benzene rings connected via the imine group make a dihedral angle of 9.64 (11)°. In the crystal, the Y-shaped molecules are weakly associated into centrosymmetric dimers through pairs of C—H⋯O(hexyl) contacts. The resulting layers of dimers, approximately parallel to (25), are closely packed in the crystal, allowing π⋯π interactions between benzene rings of neighboring layers: the separation between the centroid of the benzene ring substituted by allylcarbonate and the centroid of the benzene ring bearing the hexyloxy group in the adjacent layer is 3.895 (1) Å.
Related literature
For the et al. (2005). For the crystal structures of molecules with allycarbonate functionality, see: Michelet et al. (2003); Burns & Forsyth (2008); Flores Ahuactzin et al. (2009). For applications of the above molecules as polymerizable monomers, see: Herrera (2006).
of 4-(hexyloxy)aniline, used as a starting material, see: HerreraExperimental
Crystal data
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Data collection
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Refinement
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Data collection: XSCANS (Siemens, 1996); cell XSCANS; data reduction: XSCANS; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536809041142/ci2922sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809041142/ci2922Isup2.hkl
A solution of 3,5-dihydroxybenzaldehyde (0.5 g, 3.6 mmol) in CH2Cl2 and pyridine as catalyst was cooled in an ice bath, and allylchloroformate (0.95 g, 7.8 mmol) was added dropwise under stirring at 278 K. The mixture was stirred for 4 h under an atmosphere of Ar. The reaction was then treated with a solution of HCl at 5%, and concentrated under reduced pressure, yielding the crude aldehyde (3) as a liquid (Fig. 1). This intermediate was purified by
on silica, eluting with CH2Cl2. Yield 91%. To a solution of (3) (0.5 g, 1.6 mmol) in dry ethanol (30 ml) was added 4-(hexyloxy)aniline (0.33 g, 1.6 mmol) under an atmosphere of Ar. The reaction mixture was then heated to 325 K for 18 h. The reaction mixture was cooled to room temperature and solvent eliminated under reduced pressure, affording (I), which was purified by on silica, eluting with CH2Cl2 and then recrystallized from methanol (93% yield; brown crystals).Both allycarbonate groups are disordered over two positions. Atoms O24, O25, C26, C27 and C28 are disordered over two sites (O241/O251/C261/C271/C281 and O242/O252/C262/C272/C282), with refined occupancies of 0.564 (9) and 0.436 (9). In the same way, atoms O31, O32, C33, C34 and C35 are disordered over two positions (O311/O321/C331/C341/C351 and O312/O322/C332/C342/C352), with occupancies of 0.665 (9) and 0.335 (9). Bond lengths in these disordered fragments were restrained using target values afforded by Mogul; for the first disordered part, restraints are as follows: C23—O241 = 1.21 (1) Å; C23—O251 = 1.33 (1) Å; O251—C261 = 1.46 (1) Å; C261—C271 = 1.47 (1) Å; C271—C281 = 1.27 (1) Å. Similar restraints were used in other disordered parts. All H atoms were placed in calculated positions and refined as riding to their parent atoms. C—H bond lengths were fixed to 0.96 (methyl), 0.97 (methylene), or 0.93 Å (all other H toms). Isotropic displacement parameters for H atoms were calculated as Uiso(H) = 1.2Ueq(carrier atom), except for methyl C21, for which Uiso(H) = 1.5Ueq(C21).
We are involved in a general project dealing with the synthesis of new allyl carbonate compounds, with the hope to obtain suitable monomers for the preparation of glasses with designed properties (Herrera, 2006). The previous report in this series was about allyl 4-hydroxyphenyl carbonate (Flores Ahuactzin et al., 2009), which was found to display a disordered allyl functionality in the solid-state.
The title molecule, (I), is based on a benzene core di-substituted by allyl carbonate groups. The molecule is completed by a third substituent, derived from 4-(hexyloxy)aniline, for which the X-ray structure has been also reported (Herrera et al., 2005). The whole molecule is a Schiff base including chemical features expected to give a mesogenic behavior to the material. This compound can be prepared following two routes, starting from 3,5-dihydroxybenzaldehyde. The two steps route (Fig. 1 and experimental) consists of the functionalization of 3,5-dihydroxybenzaldehyde using allylchloroformate, followed by condensation with 4-(hexyloxy)aniline, to form the Schiff base. The alternative route (Herrera, 2006) is to prepare the Schiff base prior to functionalize with allylchloroformate.
The resulting compound (Fig. 2) is characterized by strongly disordered allylcarbonate substituents: five of the seven atoms in each substituent are disordered over two sites (Fig. 2, inset), with occupancies being 0.564 (9) and 0.436 (9) for one arm, and 0.665 (9) and 0.335 (9) in the other. A remarkable arrangement is observed in the first substituent (O22···C28), where disordered final CCH2 groups are placed almost perpendicular, reflecting a high degree of σ bonds in these substituents. This behavior, resulting in a variety of stable conformations for the allylcarbonate functional groups, has been also observed in related structures (Michelet et al., 2003; Burns & Forsyth, 2008; Flores Ahuactzin et al., 2009). In (I), the observed disorder may be related to the rather low melting point of this material, 318 K (45° C).
aboutThe imine component is ordered, and the hexyl chain presents the common all-trans conformation. The complete molecule is Y-shaped, with a small dihedral angle of 9.64 (11)° between the benzene rings.
The 25) in the crystal. Two neighboring layers are in close contact via π···π interactions between benzene rings (Fig. 3, inset). The centroid of the benzene ring substituted by allylcarbonate and the centroid of the benzene ring bearing the hexyloxy group in the following layer (symmetry code: x - 1, y, z), are separated by 3.895 (1) Å.
(Fig. 3) contains centrosymmetric dimers, formed through weak C—H···O(hexyl) contacts. Dimers are arranged in planes, approximately parallel to the (2For the
of 4-(hexyloxy)aniline, used as a starting material, see: Herrera et al. (2005). For the crystal structures of molecules with allycarbonate functionality, see: Michelet et al. (2003); Burns & Forsyth (2008); Flores Ahuactzin et al. (2009). For applications of the above molecules as polymerizable monomers, see: Herrera (2006).Data collection: XSCANS (Siemens, 1996); cell
XSCANS (Siemens, 1996); data reduction: XSCANS (Siemens, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C27H31NO7 | Z = 2 |
Mr = 481.53 | F(000) = 512 |
Triclinic, P1 | Dx = 1.225 Mg m−3 |
Hall symbol: -P 1 | Melting point: 318 K |
a = 8.6407 (11) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 10.9711 (14) Å | Cell parameters from 70 reflections |
c = 15.014 (2) Å | θ = 4.5–12.5° |
α = 102.756 (11)° | µ = 0.09 mm−1 |
β = 103.368 (12)° | T = 298 K |
γ = 101.092 (12)° | Plate, brown |
V = 1305.4 (3) Å3 | 0.6 × 0.6 × 0.2 mm |
Bruker P4 diffractometer | Rint = 0.027 |
Radiation source: fine-focus sealed tube | θmax = 27.5°, θmin = 2.0° |
Graphite monochromator | h = −11→3 |
2θ/ω scans | k = −13→13 |
8105 measured reflections | l = −19→19 |
5927 independent reflections | 3 standard reflections every 97 reflections |
3505 reflections with I > 2σ(I) | intensity decay: 1% |
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)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.165 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0692P)2 + 0.1545P] where P = (Fo2 + 2Fc2)/3 |
5927 reflections | (Δ/σ)max = 0.001 |
409 parameters | Δρmax = 0.14 e Å−3 |
20 restraints | Δρmin = −0.15 e Å−3 |
0 constraints |
C27H31NO7 | γ = 101.092 (12)° |
Mr = 481.53 | V = 1305.4 (3) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.6407 (11) Å | Mo Kα radiation |
b = 10.9711 (14) Å | µ = 0.09 mm−1 |
c = 15.014 (2) Å | T = 298 K |
α = 102.756 (11)° | 0.6 × 0.6 × 0.2 mm |
β = 103.368 (12)° |
Bruker P4 diffractometer | Rint = 0.027 |
8105 measured reflections | 3 standard reflections every 97 reflections |
5927 independent reflections | intensity decay: 1% |
3505 reflections with I > 2σ(I) |
R[F2 > 2σ(F2)] = 0.053 | 20 restraints |
wR(F2) = 0.165 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.14 e Å−3 |
5927 reflections | Δρmin = −0.15 e Å−3 |
409 parameters |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
C1 | 0.8795 (2) | 0.36570 (18) | 0.72744 (13) | 0.0647 (4) | |
C2 | 0.8794 (2) | 0.2444 (2) | 0.67888 (14) | 0.0715 (5) | |
H2A | 0.9542 | 0.2323 | 0.6442 | 0.086* | |
C3 | 0.7648 (2) | 0.14046 (19) | 0.68288 (15) | 0.0704 (5) | |
C4 | 0.6528 (2) | 0.15553 (18) | 0.73416 (14) | 0.0648 (4) | |
H4A | 0.5769 | 0.0841 | 0.7361 | 0.078* | |
C5 | 0.6560 (2) | 0.28065 (17) | 0.78313 (12) | 0.0602 (4) | |
C6 | 0.7713 (2) | 0.38578 (18) | 0.78032 (13) | 0.0645 (4) | |
H6A | 0.7756 | 0.4691 | 0.8138 | 0.077* | |
C7 | 0.5327 (2) | 0.30287 (18) | 0.83354 (13) | 0.0646 (4) | |
H7A | 0.5447 | 0.3860 | 0.8706 | 0.078* | |
N8 | 0.41161 (18) | 0.21453 (14) | 0.82888 (11) | 0.0642 (4) | |
C9 | 0.2901 (2) | 0.24258 (16) | 0.87404 (12) | 0.0593 (4) | |
C10 | 0.1795 (2) | 0.13913 (17) | 0.88151 (14) | 0.0692 (5) | |
H10A | 0.1877 | 0.0558 | 0.8569 | 0.083* | |
C11 | 0.0566 (2) | 0.15580 (17) | 0.92465 (14) | 0.0706 (5) | |
H11A | −0.0160 | 0.0845 | 0.9292 | 0.085* | |
C12 | 0.0425 (2) | 0.27938 (16) | 0.96082 (12) | 0.0606 (4) | |
C13 | 0.1498 (2) | 0.38393 (17) | 0.95118 (14) | 0.0667 (5) | |
H13A | 0.1394 | 0.4671 | 0.9739 | 0.080* | |
C14 | 0.2712 (2) | 0.36611 (17) | 0.90851 (14) | 0.0666 (5) | |
H14A | 0.3419 | 0.4374 | 0.9025 | 0.080* | |
O15 | −0.07085 (16) | 0.30948 (12) | 1.00565 (10) | 0.0730 (4) | |
C16 | −0.1880 (2) | 0.20872 (17) | 1.01915 (14) | 0.0683 (5) | |
H16A | −0.1319 | 0.1589 | 1.0554 | 0.082* | |
H16B | −0.2565 | 0.1509 | 0.9581 | 0.082* | |
C17 | −0.2914 (2) | 0.27331 (17) | 1.07262 (13) | 0.0666 (5) | |
H17A | −0.3449 | 0.3231 | 1.0352 | 0.080* | |
H17B | −0.2195 | 0.3333 | 1.1320 | 0.080* | |
C18 | −0.4212 (2) | 0.18124 (18) | 1.09486 (16) | 0.0740 (5) | |
H18A | −0.3678 | 0.1338 | 1.1346 | 0.089* | |
H18B | −0.4912 | 0.1192 | 1.0359 | 0.089* | |
C19 | −0.5273 (2) | 0.24900 (19) | 1.14540 (15) | 0.0734 (5) | |
H19A | −0.4567 | 0.3108 | 1.2043 | 0.088* | |
H19B | −0.5790 | 0.2972 | 1.1057 | 0.088* | |
C20 | −0.6588 (3) | 0.1610 (2) | 1.1682 (2) | 0.0974 (7) | |
H20A | −0.6073 | 0.1144 | 1.2093 | 0.117* | |
H20B | −0.7283 | 0.0979 | 1.1095 | 0.117* | |
C21 | −0.7661 (3) | 0.2299 (3) | 1.2164 (2) | 0.1085 (8) | |
H21A | −0.8454 | 0.1681 | 1.2302 | 0.163* | |
H21B | −0.8222 | 0.2728 | 1.1749 | 0.163* | |
H21C | −0.6986 | 0.2925 | 1.2747 | 0.163* | |
O22 | 0.77632 (17) | 0.01980 (14) | 0.63440 (13) | 0.1008 (5) | |
C23 | 0.6461 (3) | −0.0735 (2) | 0.58199 (16) | 0.0801 (6) | |
O241 | 0.5208 (7) | −0.0956 (6) | 0.6034 (6) | 0.149 (3) | 0.564 (9) |
O251 | 0.6943 (11) | −0.1715 (7) | 0.5473 (7) | 0.102 (3) | 0.564 (9) |
C261 | 0.5708 (9) | −0.2733 (8) | 0.4693 (6) | 0.097 (3) | 0.564 (9) |
H26A | 0.5233 | −0.3415 | 0.4940 | 0.116* | 0.564 (9) |
H26B | 0.4832 | −0.2380 | 0.4410 | 0.116* | 0.564 (9) |
C271 | 0.6431 (10) | −0.3250 (7) | 0.3991 (4) | 0.094 (2) | 0.564 (9) |
H27A | 0.6882 | −0.2686 | 0.3684 | 0.113* | 0.564 (9) |
C281 | 0.6523 (11) | −0.4432 (6) | 0.3737 (7) | 0.116 (2) | 0.564 (9) |
H28A | 0.6088 | −0.5031 | 0.4024 | 0.140* | 0.564 (9) |
H28B | 0.7024 | −0.4683 | 0.3266 | 0.140* | 0.564 (9) |
O242 | 0.5239 (9) | −0.0401 (7) | 0.5506 (6) | 0.130 (3) | 0.436 (9) |
O252 | 0.6795 (12) | −0.1657 (9) | 0.5220 (9) | 0.080 (2) | 0.436 (9) |
C262 | 0.5589 (18) | −0.2909 (11) | 0.4839 (11) | 0.122 (5) | 0.436 (9) |
H26C | 0.5454 | −0.3263 | 0.5362 | 0.147* | 0.436 (9) |
H26D | 0.4537 | −0.2787 | 0.4529 | 0.147* | 0.436 (9) |
C272 | 0.6050 (10) | −0.3823 (10) | 0.4167 (7) | 0.116 (4) | 0.436 (9) |
H27B | 0.5567 | −0.4687 | 0.4091 | 0.139* | 0.436 (9) |
C282 | 0.7030 (11) | −0.3623 (17) | 0.3657 (8) | 0.126 (4) | 0.436 (9) |
H28C | 0.7559 | −0.2782 | 0.3695 | 0.151* | 0.436 (9) |
H28D | 0.7210 | −0.4319 | 0.3249 | 0.151* | 0.436 (9) |
O29 | 0.99760 (15) | 0.47296 (13) | 0.72656 (10) | 0.0782 (4) | |
C30 | 0.9509 (3) | 0.5274 (2) | 0.65583 (16) | 0.0760 (5) | |
O311 | 0.8370 (8) | 0.4836 (9) | 0.5878 (5) | 0.125 (3) | 0.665 (9) |
O321 | 1.0645 (7) | 0.6334 (6) | 0.6683 (5) | 0.0712 (12) | 0.665 (9) |
C331 | 1.0261 (6) | 0.6997 (5) | 0.5963 (3) | 0.0784 (13) | 0.665 (9) |
H33A | 0.9295 | 0.7313 | 0.5994 | 0.094* | 0.665 (9) |
H33B | 1.0043 | 0.6416 | 0.5333 | 0.094* | 0.665 (9) |
C341 | 1.1697 (5) | 0.8080 (5) | 0.6154 (4) | 0.0931 (16) | 0.665 (9) |
H34A | 1.2729 | 0.7915 | 0.6231 | 0.112* | 0.665 (9) |
C351 | 1.1595 (16) | 0.9217 (10) | 0.6217 (10) | 0.176 (5) | 0.665 (9) |
H35A | 1.0575 | 0.9404 | 0.6142 | 0.212* | 0.665 (9) |
H35B | 1.2538 | 0.9874 | 0.6339 | 0.212* | 0.665 (9) |
O312 | 0.8084 (8) | 0.5001 (13) | 0.6096 (7) | 0.074 (2) | 0.335 (9) |
O322 | 1.0978 (15) | 0.6155 (15) | 0.6718 (12) | 0.110 (5) | 0.335 (9) |
C332 | 1.122 (2) | 0.6920 (11) | 0.6036 (9) | 0.119 (4) | 0.335 (9) |
H33C | 1.2353 | 0.7073 | 0.6024 | 0.143* | 0.335 (9) |
H33D | 1.0529 | 0.6423 | 0.5402 | 0.143* | 0.335 (9) |
C342 | 1.081 (2) | 0.8163 (11) | 0.6282 (10) | 0.173 (9) | 0.335 (9) |
H34B | 0.9841 | 0.8117 | 0.6459 | 0.207* | 0.335 (9) |
C352 | 1.1533 (14) | 0.9284 (7) | 0.6298 (11) | 0.086 (4) | 0.335 (9) |
H35C | 1.2511 | 0.9419 | 0.6132 | 0.103* | 0.335 (9) |
H35D | 1.1088 | 0.9975 | 0.6476 | 0.103* | 0.335 (9) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0521 (9) | 0.0710 (11) | 0.0688 (11) | 0.0102 (8) | 0.0160 (8) | 0.0214 (9) |
C2 | 0.0545 (10) | 0.0824 (13) | 0.0786 (12) | 0.0185 (9) | 0.0254 (9) | 0.0167 (10) |
C3 | 0.0586 (10) | 0.0677 (11) | 0.0853 (13) | 0.0237 (9) | 0.0239 (9) | 0.0124 (9) |
C4 | 0.0578 (10) | 0.0609 (10) | 0.0805 (12) | 0.0187 (8) | 0.0254 (9) | 0.0204 (9) |
C5 | 0.0568 (9) | 0.0638 (10) | 0.0621 (10) | 0.0184 (8) | 0.0190 (8) | 0.0169 (8) |
C6 | 0.0636 (10) | 0.0618 (10) | 0.0663 (10) | 0.0164 (8) | 0.0186 (9) | 0.0138 (8) |
C7 | 0.0687 (11) | 0.0609 (10) | 0.0660 (11) | 0.0207 (9) | 0.0237 (9) | 0.0131 (8) |
N8 | 0.0632 (9) | 0.0596 (8) | 0.0754 (10) | 0.0200 (7) | 0.0285 (7) | 0.0173 (7) |
C9 | 0.0613 (10) | 0.0559 (9) | 0.0634 (10) | 0.0191 (8) | 0.0223 (8) | 0.0135 (8) |
C10 | 0.0741 (11) | 0.0516 (9) | 0.0873 (13) | 0.0194 (9) | 0.0363 (10) | 0.0133 (9) |
C11 | 0.0737 (11) | 0.0525 (10) | 0.0928 (13) | 0.0144 (9) | 0.0406 (11) | 0.0184 (9) |
C12 | 0.0641 (10) | 0.0575 (10) | 0.0646 (10) | 0.0197 (8) | 0.0264 (8) | 0.0137 (8) |
C13 | 0.0725 (11) | 0.0501 (9) | 0.0821 (12) | 0.0192 (8) | 0.0324 (10) | 0.0137 (8) |
C14 | 0.0701 (11) | 0.0514 (9) | 0.0852 (12) | 0.0158 (8) | 0.0341 (10) | 0.0199 (9) |
O15 | 0.0790 (8) | 0.0577 (7) | 0.0936 (9) | 0.0184 (6) | 0.0497 (7) | 0.0167 (6) |
C16 | 0.0694 (11) | 0.0599 (10) | 0.0797 (12) | 0.0155 (9) | 0.0315 (10) | 0.0182 (9) |
C17 | 0.0684 (11) | 0.0619 (10) | 0.0660 (11) | 0.0122 (8) | 0.0259 (9) | 0.0075 (8) |
C18 | 0.0776 (12) | 0.0634 (11) | 0.0877 (13) | 0.0185 (9) | 0.0389 (11) | 0.0180 (10) |
C19 | 0.0775 (12) | 0.0646 (11) | 0.0777 (12) | 0.0128 (9) | 0.0338 (10) | 0.0116 (9) |
C20 | 0.1057 (17) | 0.0846 (15) | 0.1256 (19) | 0.0259 (13) | 0.0658 (16) | 0.0412 (14) |
C21 | 0.1053 (18) | 0.121 (2) | 0.122 (2) | 0.0332 (16) | 0.0684 (16) | 0.0377 (17) |
O22 | 0.0640 (8) | 0.0730 (9) | 0.1537 (15) | 0.0224 (7) | 0.0389 (9) | −0.0042 (9) |
C23 | 0.0691 (13) | 0.0855 (14) | 0.0833 (14) | 0.0292 (12) | 0.0259 (11) | 0.0064 (11) |
O241 | 0.098 (3) | 0.123 (4) | 0.194 (6) | −0.009 (2) | 0.094 (4) | −0.043 (3) |
O251 | 0.092 (3) | 0.075 (3) | 0.110 (6) | 0.035 (2) | 0.003 (3) | −0.017 (3) |
C261 | 0.072 (4) | 0.091 (5) | 0.099 (5) | 0.030 (4) | 0.006 (3) | −0.020 (4) |
C271 | 0.080 (4) | 0.110 (5) | 0.075 (3) | 0.021 (4) | 0.005 (3) | 0.011 (3) |
C281 | 0.118 (5) | 0.098 (4) | 0.114 (5) | 0.033 (4) | 0.030 (4) | −0.009 (4) |
O242 | 0.097 (4) | 0.118 (5) | 0.129 (5) | 0.062 (4) | −0.029 (3) | −0.025 (3) |
O252 | 0.066 (4) | 0.093 (4) | 0.089 (5) | 0.039 (3) | 0.031 (4) | 0.018 (3) |
C262 | 0.145 (9) | 0.091 (7) | 0.105 (7) | −0.019 (6) | 0.051 (7) | 0.001 (6) |
C272 | 0.099 (5) | 0.061 (5) | 0.186 (9) | 0.012 (4) | 0.065 (5) | 0.013 (5) |
C282 | 0.101 (6) | 0.177 (13) | 0.118 (6) | 0.065 (7) | 0.048 (5) | 0.036 (8) |
O29 | 0.0621 (7) | 0.0825 (9) | 0.0840 (9) | 0.0036 (7) | 0.0179 (7) | 0.0274 (7) |
C30 | 0.0905 (16) | 0.0677 (12) | 0.0688 (13) | 0.0123 (11) | 0.0321 (12) | 0.0140 (10) |
O311 | 0.169 (5) | 0.101 (3) | 0.071 (3) | −0.008 (3) | 0.009 (3) | 0.022 (2) |
O321 | 0.0649 (15) | 0.070 (2) | 0.077 (2) | 0.0065 (18) | 0.0211 (15) | 0.0249 (17) |
C331 | 0.083 (3) | 0.078 (2) | 0.077 (2) | 0.014 (2) | 0.024 (2) | 0.0321 (18) |
C341 | 0.072 (2) | 0.086 (4) | 0.137 (4) | 0.016 (2) | 0.046 (2) | 0.050 (3) |
C351 | 0.166 (9) | 0.168 (11) | 0.214 (12) | 0.034 (8) | 0.094 (8) | 0.058 (8) |
O312 | 0.043 (3) | 0.097 (5) | 0.060 (4) | −0.009 (2) | −0.009 (3) | 0.025 (4) |
O322 | 0.156 (11) | 0.089 (5) | 0.118 (7) | 0.038 (6) | 0.080 (7) | 0.044 (4) |
C332 | 0.140 (11) | 0.120 (9) | 0.094 (7) | 0.018 (8) | 0.050 (8) | 0.019 (5) |
C342 | 0.185 (17) | 0.26 (3) | 0.197 (14) | 0.139 (19) | 0.122 (13) | 0.161 (16) |
C352 | 0.072 (6) | 0.038 (4) | 0.128 (9) | 0.000 (4) | 0.004 (6) | 0.023 (5) |
C1—C2 | 1.369 (3) | C21—H21C | 0.96 |
C1—C6 | 1.378 (2) | O22—C23 | 1.313 (2) |
C1—O29 | 1.406 (2) | C23—O241 | 1.195 (4) |
C2—C3 | 1.381 (3) | C23—O242 | 1.211 (4) |
C2—H2A | 0.93 | C23—O251 | 1.275 (6) |
C3—C4 | 1.381 (3) | C23—O252 | 1.322 (7) |
C3—O22 | 1.397 (2) | O251—C261 | 1.464 (7) |
C4—C5 | 1.399 (2) | C261—C271 | 1.414 (8) |
C4—H4A | 0.93 | C261—H26A | 0.97 |
C5—C6 | 1.387 (2) | C261—H26B | 0.97 |
C5—C7 | 1.469 (2) | C271—C281 | 1.291 (7) |
C6—H6A | 0.93 | C271—H27A | 0.93 |
C7—N8 | 1.259 (2) | C281—H28A | 0.93 |
C7—H7A | 0.93 | C281—H28B | 0.93 |
N8—C9 | 1.421 (2) | O252—C262 | 1.458 (9) |
C9—C10 | 1.379 (2) | C262—C272 | 1.440 (9) |
C9—C14 | 1.395 (2) | C262—H26C | 0.97 |
C10—C11 | 1.387 (2) | C262—H26D | 0.97 |
C10—H10A | 0.93 | C272—C282 | 1.287 (9) |
C11—C12 | 1.384 (2) | C272—H27B | 0.93 |
C11—H11A | 0.93 | C282—H28C | 0.93 |
C12—O15 | 1.361 (2) | C282—H28D | 0.93 |
C12—C13 | 1.387 (2) | O29—C30 | 1.350 (3) |
C13—C14 | 1.373 (2) | C30—O311 | 1.174 (5) |
C13—H13A | 0.93 | C30—O312 | 1.208 (6) |
C14—H14A | 0.93 | C30—O321 | 1.315 (5) |
O15—C16 | 1.432 (2) | C30—O322 | 1.374 (9) |
C16—C17 | 1.506 (2) | O321—C331 | 1.444 (6) |
C16—H16A | 0.97 | C331—C341 | 1.467 (5) |
C16—H16B | 0.97 | C331—H33A | 0.97 |
C17—C18 | 1.508 (3) | C331—H33B | 0.97 |
C17—H17A | 0.97 | C341—C351 | 1.251 (8) |
C17—H17B | 0.97 | C341—H34A | 0.93 |
C18—C19 | 1.518 (3) | C351—H35A | 0.93 |
C18—H18A | 0.97 | C351—H35B | 0.93 |
C18—H18B | 0.97 | O322—C332 | 1.484 (9) |
C19—C20 | 1.498 (3) | C332—C342 | 1.463 (10) |
C19—H19A | 0.97 | C332—H33C | 0.97 |
C19—H19B | 0.97 | C332—H33D | 0.97 |
C20—C21 | 1.514 (3) | C342—C352 | 1.261 (10) |
C20—H20A | 0.97 | C342—H34B | 0.93 |
C20—H20B | 0.97 | C352—H35C | 0.93 |
C21—H21A | 0.96 | C352—H35D | 0.93 |
C21—H21B | 0.96 | ||
C2—C1—C6 | 121.97 (17) | C20—C21—H21C | 109.5 |
C2—C1—O29 | 119.21 (16) | H21A—C21—H21C | 109.5 |
C6—C1—O29 | 118.77 (17) | H21B—C21—H21C | 109.5 |
C1—C2—C3 | 118.05 (17) | C23—O22—C3 | 122.43 (15) |
C1—C2—H2A | 121.0 | O241—C23—O251 | 116.3 (6) |
C3—C2—H2A | 121.0 | O242—C23—O251 | 129.8 (5) |
C2—C3—C4 | 122.21 (17) | O241—C23—O22 | 123.4 (3) |
C2—C3—O22 | 114.62 (16) | O242—C23—O22 | 116.0 (4) |
C4—C3—O22 | 123.13 (18) | O251—C23—O22 | 108.3 (4) |
C3—C4—C5 | 118.46 (17) | O241—C23—O252 | 119.5 (5) |
C3—C4—H4A | 120.8 | O242—C23—O252 | 115.9 (7) |
C5—C4—H4A | 120.8 | O22—C23—O252 | 113.6 (5) |
C6—C5—C4 | 119.89 (16) | C23—O251—C261 | 115.8 (7) |
C6—C5—C7 | 119.33 (16) | C271—C261—O251 | 110.4 (7) |
C4—C5—C7 | 120.70 (16) | C271—C261—H26A | 109.6 |
C1—C6—C5 | 119.40 (17) | O251—C261—H26A | 109.6 |
C1—C6—H6A | 120.3 | C271—C261—H26B | 109.6 |
C5—C6—H6A | 120.3 | O251—C261—H26B | 109.6 |
N8—C7—C5 | 123.01 (17) | H26A—C261—H26B | 108.1 |
N8—C7—H7A | 118.5 | C281—C271—C261 | 126.2 (11) |
C5—C7—H7A | 118.5 | C281—C271—H27A | 116.9 |
C7—N8—C9 | 120.81 (15) | C261—C271—H27A | 116.9 |
C10—C9—C14 | 117.79 (15) | C271—C281—H28A | 120.0 |
C10—C9—N8 | 117.22 (15) | C271—C281—H28B | 120.0 |
C14—C9—N8 | 124.95 (16) | H28A—C281—H28B | 120.0 |
C9—C10—C11 | 121.88 (16) | C23—O252—C262 | 117.8 (8) |
C9—C10—H10A | 119.1 | C272—C262—O252 | 113.0 (10) |
C11—C10—H10A | 119.1 | C272—C262—H26C | 109.0 |
C12—C11—C10 | 119.52 (16) | O252—C262—H26C | 109.0 |
C12—C11—H11A | 120.2 | C272—C262—H26D | 109.0 |
C10—C11—H11A | 120.2 | O252—C262—H26D | 109.0 |
O15—C12—C11 | 125.58 (16) | H26C—C262—H26D | 107.8 |
O15—C12—C13 | 115.30 (15) | C282—C272—C262 | 129.7 (16) |
C11—C12—C13 | 119.12 (15) | C282—C272—H27B | 115.1 |
C14—C13—C12 | 120.75 (16) | C262—C272—H27B | 115.1 |
C14—C13—H13A | 119.6 | C272—C282—H28C | 120.0 |
C12—C13—H13A | 119.6 | C272—C282—H28D | 120.0 |
C13—C14—C9 | 120.87 (16) | H28C—C282—H28D | 120.0 |
C13—C14—H14A | 119.6 | C30—O29—C1 | 115.14 (15) |
C9—C14—H14A | 119.6 | O311—C30—O321 | 123.3 (5) |
C12—O15—C16 | 119.90 (13) | O312—C30—O321 | 126.9 (7) |
O15—C16—C17 | 106.86 (14) | O311—C30—O29 | 127.1 (5) |
O15—C16—H16A | 110.4 | O312—C30—O29 | 120.5 (6) |
C17—C16—H16A | 110.4 | O321—C30—O29 | 109.2 (3) |
O15—C16—H16B | 110.4 | O311—C30—O322 | 131.1 (8) |
C17—C16—H16B | 110.4 | O312—C30—O322 | 140.5 (9) |
H16A—C16—H16B | 108.6 | O29—C30—O322 | 98.3 (6) |
C16—C17—C18 | 114.36 (15) | C30—O321—C331 | 113.6 (4) |
C16—C17—H17A | 108.7 | O321—C331—C341 | 106.9 (4) |
C18—C17—H17A | 108.7 | O321—C331—H33A | 110.3 |
C16—C17—H17B | 108.7 | C341—C331—H33A | 110.3 |
C18—C17—H17B | 108.7 | O321—C331—H33B | 110.3 |
H17A—C17—H17B | 107.6 | C341—C331—H33B | 110.3 |
C17—C18—C19 | 113.01 (16) | H33A—C331—H33B | 108.6 |
C17—C18—H18A | 109.0 | C351—C341—C331 | 122.8 (9) |
C19—C18—H18A | 109.0 | C351—C341—H34A | 118.6 |
C17—C18—H18B | 109.0 | C331—C341—H34A | 118.6 |
C19—C18—H18B | 109.0 | C341—C351—H35A | 120.0 |
H18A—C18—H18B | 107.8 | C341—C351—H35B | 120.0 |
C20—C19—C18 | 114.79 (17) | H35A—C351—H35B | 120.0 |
C20—C19—H19A | 108.6 | C30—O322—C332 | 120.9 (11) |
C18—C19—H19A | 108.6 | C342—C332—O322 | 112.6 (11) |
C20—C19—H19B | 108.6 | C342—C332—H33C | 109.1 |
C18—C19—H19B | 108.6 | O322—C332—H33C | 109.1 |
H19A—C19—H19B | 107.5 | C342—C332—H33D | 109.1 |
C19—C20—C21 | 114.1 (2) | O322—C332—H33D | 109.1 |
C19—C20—H20A | 108.7 | H33C—C332—H33D | 107.8 |
C21—C20—H20A | 108.7 | C352—C342—C332 | 131.7 (15) |
C19—C20—H20B | 108.7 | C352—C342—H34B | 114.2 |
C21—C20—H20B | 108.7 | C332—C342—H34B | 114.2 |
H20A—C20—H20B | 107.6 | C342—C352—H35C | 120.0 |
C20—C21—H21A | 109.5 | C342—C352—H35D | 120.0 |
C20—C21—H21B | 109.5 | H35C—C352—H35D | 120.0 |
H21A—C21—H21B | 109.5 | ||
C6—C1—C2—C3 | 0.9 (3) | C4—C3—O22—C23 | 44.3 (3) |
O29—C1—C2—C3 | 178.39 (17) | C3—O22—C23—O241 | −38.6 (7) |
C1—C2—C3—C4 | −0.3 (3) | C3—O22—C23—O242 | 24.6 (7) |
C1—C2—C3—O22 | −177.81 (17) | C3—O22—C23—O251 | −179.7 (6) |
C2—C3—C4—C5 | 0.3 (3) | C3—O22—C23—O252 | 162.6 (7) |
O22—C3—C4—C5 | 177.54 (18) | O241—C23—O251—C261 | 50.0 (14) |
C3—C4—C5—C6 | −0.8 (3) | O242—C23—O251—C261 | −14.5 (18) |
C3—C4—C5—C7 | 175.94 (17) | O22—C23—O251—C261 | −165.8 (8) |
C2—C1—C6—C5 | −1.4 (3) | O252—C23—O251—C261 | −55 (2) |
O29—C1—C6—C5 | −178.93 (15) | C23—O251—C261—C271 | 141.0 (8) |
C4—C5—C6—C1 | 1.4 (3) | O251—C261—C271—C281 | 117.9 (9) |
C7—C5—C6—C1 | −175.40 (16) | O241—C23—O252—C262 | 0.7 (17) |
C6—C5—C7—N8 | 170.43 (18) | O242—C23—O252—C262 | −61.5 (16) |
C4—C5—C7—N8 | −6.3 (3) | O251—C23—O252—C262 | 85 (3) |
C5—C7—N8—C9 | −175.94 (15) | O22—C23—O252—C262 | 160.4 (10) |
C7—N8—C9—C10 | −167.86 (18) | C23—O252—C262—C272 | 177.8 (12) |
C7—N8—C9—C14 | 14.3 (3) | O252—C262—C272—C282 | −23 (2) |
C14—C9—C10—C11 | −2.2 (3) | C2—C1—O29—C30 | 91.0 (2) |
N8—C9—C10—C11 | 179.72 (17) | C6—C1—O29—C30 | −91.5 (2) |
C9—C10—C11—C12 | 0.5 (3) | C1—O29—C30—O311 | −13.5 (6) |
C10—C11—C12—O15 | −179.23 (18) | C1—O29—C30—O312 | 13.3 (8) |
C10—C11—C12—C13 | 1.4 (3) | C1—O29—C30—O321 | 173.9 (4) |
O15—C12—C13—C14 | 178.99 (17) | C1—O29—C30—O322 | −174.0 (9) |
C11—C12—C13—C14 | −1.6 (3) | O311—C30—O321—C331 | 7.2 (10) |
C12—C13—C14—C9 | −0.2 (3) | O312—C30—O321—C331 | −20.8 (11) |
C10—C9—C14—C13 | 2.1 (3) | O29—C30—O321—C331 | −179.8 (5) |
N8—C9—C14—C13 | 179.94 (17) | O322—C30—O321—C331 | 131 (4) |
C11—C12—O15—C16 | 0.5 (3) | C30—O321—C331—C341 | −175.1 (6) |
C13—C12—O15—C16 | 179.83 (16) | O321—C331—C341—C351 | −128.8 (9) |
C12—O15—C16—C17 | 178.47 (15) | O311—C30—O322—C332 | 12 (2) |
O15—C16—C17—C18 | −179.06 (16) | O312—C30—O322—C332 | −18 (3) |
C16—C17—C18—C19 | −177.82 (17) | O321—C30—O322—C332 | −54 (3) |
C17—C18—C19—C20 | 179.53 (19) | O29—C30—O322—C332 | 171.8 (14) |
C18—C19—C20—C21 | −178.6 (2) | C30—O322—C332—C342 | 92 (2) |
C2—C3—O22—C23 | −138.2 (2) | O322—C332—C342—C352 | 136.0 (16) |
D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13A···O15i | 0.93 | 2.60 | 3.511 (2) | 166 |
Symmetry code: (i) −x, −y+1, −z+2. |
Experimental details
Crystal data | |
Chemical formula | C27H31NO7 |
Mr | 481.53 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 8.6407 (11), 10.9711 (14), 15.014 (2) |
α, β, γ (°) | 102.756 (11), 103.368 (12), 101.092 (12) |
V (Å3) | 1305.4 (3) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.6 × 0.6 × 0.2 |
Data collection | |
Diffractometer | Bruker P4 |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8105, 5927, 3505 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.053, 0.165, 1.04 |
No. of reflections | 5927 |
No. of parameters | 409 |
No. of restraints | 20 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.14, −0.15 |
Computer programs: XSCANS (Siemens, 1996), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), Mercury (Macrae et al., 2006).
D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13A···O15i | 0.93 | 2.60 | 3.511 (2) | 166 |
Symmetry code: (i) −x, −y+1, −z+2. |
Acknowledgements
AMH is indebted to PROMEP (Mexico) for providing a research grant. Partial support from VIEP-BUAP (project Nos. 7/I/NAT/05 and 36/NA/06–1) is gratefully acknowledged.
References
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Herrera, A. M., Bernès, S. & López, D. (2005). Acta Cryst. E61, o3212–o3213. Web of Science CSD CrossRef IUCr Journals Google Scholar
Macrae, C. F., Edgington, P. R., McCabe, P., Pidcock, E., Shields, G. P., Taylor, R., Towler, M. & van de Streek, J. (2006). J. Appl. Cryst. 39, 453–457. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
We are involved in a general project dealing with the synthesis of new allyl carbonate compounds, with the hope to obtain suitable monomers for the preparation of glasses with designed properties (Herrera, 2006). The previous report in this series was about allyl 4-hydroxyphenyl carbonate (Flores Ahuactzin et al., 2009), which was found to display a disordered allyl functionality in the solid-state.
The title molecule, (I), is based on a benzene core di-substituted by allyl carbonate groups. The molecule is completed by a third substituent, derived from 4-(hexyloxy)aniline, for which the X-ray structure has been also reported (Herrera et al., 2005). The whole molecule is a Schiff base including chemical features expected to give a mesogenic behavior to the material. This compound can be prepared following two routes, starting from 3,5-dihydroxybenzaldehyde. The two steps route (Fig. 1 and experimental) consists of the functionalization of 3,5-dihydroxybenzaldehyde using allylchloroformate, followed by condensation with 4-(hexyloxy)aniline, to form the Schiff base. The alternative route (Herrera, 2006) is to prepare the Schiff base prior to functionalize with allylchloroformate.
The resulting compound (Fig. 2) is characterized by strongly disordered allylcarbonate substituents: five of the seven atoms in each substituent are disordered over two sites (Fig. 2, inset), with occupancies being 0.564 (9) and 0.436 (9) for one arm, and 0.665 (9) and 0.335 (9) in the other. A remarkable arrangement is observed in the first substituent (O22···C28), where disordered final CCH2 groups are placed almost perpendicular, reflecting a high degree of free rotation about σ bonds in these substituents. This behavior, resulting in a variety of stable conformations for the allylcarbonate functional groups, has been also observed in related structures (Michelet et al., 2003; Burns & Forsyth, 2008; Flores Ahuactzin et al., 2009). In (I), the observed disorder may be related to the rather low melting point of this material, 318 K (45° C).
The imine component is ordered, and the hexyl chain presents the common all-trans conformation. The complete molecule is Y-shaped, with a small dihedral angle of 9.64 (11)° between the benzene rings.
The crystal structure (Fig. 3) contains centrosymmetric dimers, formed through weak C—H···O(hexyl) contacts. Dimers are arranged in planes, approximately parallel to the (225) in the crystal. Two neighboring layers are in close contact via π···π interactions between benzene rings (Fig. 3, inset). The centroid of the benzene ring substituted by allylcarbonate and the centroid of the benzene ring bearing the hexyloxy group in the following layer (symmetry code: x - 1, y, z), are separated by 3.895 (1) Å.