organic compounds
6,6′-Di-tert-butyl-4,4′-dimethoxy-2,2′-[1,3-diazinane-1,3-diylbis(methylene)]diphenol 0.19-hydrate
aDepartamento de Química, Universidad Nacional de Colombia, Ciudad Universitaria, Bogotá, Colombia, and bInstitute of Physics ASCR, v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic
*Correspondence e-mail: ariverau@unal.edu.co
In the title hexahydropyrimidine derivative, C28H42N2O4·0.19H2O, the 1,3-diazinane ring has a chair conformation with a diequatorial substitution. The contains one half-organic molecule and a solvent water molecule with occupany 0.095. The molecule lies on a mirror plane perpendicular to [010] which passes through the C atoms at the 2- and 5-positions of the heterocyclic system. The partially occupied water molecule is also located on this mirror plane. The dihedral angle between the planes of the aromatic rings is 17.71 (3)°. Two intramolecular O—H⋯N hydrogen bonds with graph-set motif S(6) are present. No remarkable intermolecular contacts exist in the crystal structure.
Related literature
For a related structure, see: Rivera et al. (2012a). For the synthesis of the precursor, see: Rivera et al. (2010). For the preparation of the title compound, see: Rivera et al. (2012b). For bond-length data, see: Allen et al. (1987). For puckering parameters, see: Cremer & Pople (1975). For hydrogen-bond graph-set nomenclature, see: Bernstein et al. (1995).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Agilent, 2010); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR2002 (Burla et al., 2003); program(s) used to refine structure: JANA2006 (Petříček et al., 2006); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: JANA2006.
Supporting information
10.1107/S1600536811053542/go2039sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811053542/go2039Isup2.hkl
The title compound was obtained according to our recently reported methodology (Rivera et al., 2012b), that is, to a stirred solution of 2-tert-butyl-4-methoxy-phenol (2.0 mmol) in 96% ethanol (5 ml) heated under reflux, was added slowly a solution of 1,3,7,9,13,15,19,21-octaazapentacyclo[19.3.1.13,7.19,13.115,19]octacosane prepared according to a previous report (Rivera et al., 2010) (200 mg, 0.54 mmol) in 96% ethanol (5 ml). Upon completion of the addition, the reaction mixture was stirred under reflux for 60 h. Then the reflux was stopped, the solvent was removed on a rotary evaporator under vacuum and the residue obtained was chromatographed on silica gel eluting with benzene/AcOEt (gradient elution with 5% to 20% AcOEt) to afford a solid which was recrystallized in 96% ethanol to provide high quality crystals of the title compound (I), (Yield 27.0%, m.p. 403–404 K).
All hydrogen atoms were discernible in difference Fourier maps and could be refined to reasonable geometry. According to common practice the hydrogen atoms attached to carbons were kept in ideal positions with C–H distance 0.96 Å during the
The methyl H atoms were allowed to rotate freely about the adjacent C—C bonds. The coordinates of the hydrogen atom bonded to oxygen were refined freely. All H atoms were refined with displacement coefficients Uiso(H) set to 1.5Ueq(C, O) for the methyl- and hydroxyl groups and to 1.2Ueq(C) for the CH–, and CH2– groups.Data collection: CrysAlis PRO (Agilent, 2010); cell
CrysAlis PRO (Agilent, 2010); data reduction: CrysAlis PRO (Agilent, 2010); program(s) used to solve structure: SIR2002 (Burla et al., 2003); program(s) used to refine structure: JANA2006 (Petříček et al., 2006); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: JANA2006 (Petříček et al., 2006).Fig. 1. A view of (I) with the numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. | |
Fig. 2. The packing of (I), viewed along the [1,0,1] axis. |
C28H42N2O4·0.19H2O | F(000) = 1029.6 |
Mr = 473.5 | Dx = 1.154 Mg m−3 |
Orthorhombic, Pnma | Cu Kα radiation, λ = 1.5418 Å |
Hall symbol: -P 2ac 2n | Cell parameters from 37659 reflections |
a = 8.2265 (1) Å | θ = 4.0–67.0° |
b = 33.0103 (2) Å | µ = 0.61 mm−1 |
c = 10.0322 (5) Å | T = 120 K |
V = 2724.34 (14) Å3 | Block, colourless |
Z = 4 | 0.42 × 0.36 × 0.30 mm |
Agilent Xcalibur diffractometer with an Atlas (Gemini ultra Cu) detector | 2456 independent reflections |
Radiation source: Enhance Ultra (Cu) X-ray Source | 2353 reflections with I > 3σ(I) |
Mirror monochromator | Rint = 0.027 |
Detector resolution: 10.3784 pixels mm-1 | θmax = 67.1°, θmin = 4.6° |
Rotation method data acquisition using ω scans | h = −9→9 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | k = −39→39 |
Tmin = 0.073, Tmax = 1 | l = −11→11 |
54017 measured reflections |
Refinement on F2 | 85 constraints |
R[F2 > 2σ(F2)] = 0.035 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.122 | Weighting scheme based on measured s.u.'s w = 1/(σ2(I) + 0.0016I2) |
S = 2.64 | (Δ/σ)max = 0.005 |
2456 reflections | Δρmax = 0.17 e Å−3 |
164 parameters | Δρmin = −0.14 e Å−3 |
0 restraints |
C28H42N2O4·0.19H2O | V = 2724.34 (14) Å3 |
Mr = 473.5 | Z = 4 |
Orthorhombic, Pnma | Cu Kα radiation |
a = 8.2265 (1) Å | µ = 0.61 mm−1 |
b = 33.0103 (2) Å | T = 120 K |
c = 10.0322 (5) Å | 0.42 × 0.36 × 0.30 mm |
Agilent Xcalibur diffractometer with an Atlas (Gemini ultra Cu) detector | 2456 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | 2353 reflections with I > 3σ(I) |
Tmin = 0.073, Tmax = 1 | Rint = 0.027 |
54017 measured reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.122 | H atoms treated by a mixture of independent and constrained refinement |
S = 2.64 | Δρmax = 0.17 e Å−3 |
2456 reflections | Δρmin = −0.14 e Å−3 |
164 parameters |
Experimental. CrysAlisPro, Agilent (2010), Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm. |
Refinement. The refinement was carried out against all reflections. The conventional R-factor is always based on F. The goodness of fit as well as the weighted R-factor are based on F and F2 for refinement carried out on F and F2, respectively. The threshold expression is used only for calculating R-factors etc. and it is not relevant to the choice of reflections for refinement. The program used for refinement, Jana2006, uses the weighting scheme based on the experimental expectations, see _refine_ls_weighting_details, that does not force S to be one. Therefore the values of S are usually larger than the ones from the SHELX program. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O1 | 0.48228 (8) | 0.17951 (2) | 0.02311 (7) | 0.0238 (2) | |
O2 | 0.18527 (9) | 0.03041 (2) | 0.08155 (9) | 0.0348 (3) | |
O3 | 0.2004 (8) | 0.25 | 0.5283 (7) | 0.040 (3)* | 0.185 (6) |
N1 | 0.20147 (9) | 0.21389 (2) | 0.09520 (8) | 0.0196 (3) | |
C1 | 0.17203 (15) | 0.25 | 0.17490 (13) | 0.0188 (4) | |
C2 | 0.1074 (2) | 0.25 | −0.10270 (15) | 0.0302 (4) | |
C3 | 0.08755 (13) | 0.21221 (2) | −0.01750 (10) | 0.0253 (3) | |
C4 | 0.19236 (11) | 0.17724 (3) | 0.17868 (10) | 0.0219 (3) | |
C5 | 0.26169 (12) | 0.14026 (3) | 0.11072 (10) | 0.0196 (3) | |
C6 | 0.40731 (11) | 0.14256 (3) | 0.03904 (9) | 0.0189 (3) | |
C7 | 0.47830 (11) | 0.10754 (3) | −0.01656 (9) | 0.0197 (3) | |
C8 | 0.39696 (12) | 0.07106 (3) | 0.00193 (10) | 0.0226 (3) | |
C9 | 0.25098 (12) | 0.06858 (3) | 0.07237 (10) | 0.0235 (3) | |
C10 | 0.18330 (11) | 0.10307 (3) | 0.12733 (10) | 0.0211 (3) | |
C11 | 0.64179 (11) | 0.10927 (3) | −0.09068 (10) | 0.0214 (3) | |
C12 | 0.63025 (13) | 0.13705 (3) | −0.21310 (10) | 0.0273 (3) | |
C13 | 0.77305 (12) | 0.12524 (3) | 0.00455 (10) | 0.0271 (3) | |
C14 | 0.69608 (13) | 0.06750 (3) | −0.13975 (12) | 0.0323 (3) | |
C15 | 0.04374 (13) | 0.02586 (3) | 0.16101 (14) | 0.0390 (4) | |
H1 | 0.4062 (18) | 0.1977 (5) | 0.0432 (14) | 0.0357* | |
H1a | 0.243304 | 0.25 | 0.250666 | 0.0225* | |
H1b | 0.061463 | 0.25 | 0.205494 | 0.0225* | |
H2a | 0.213383 | 0.25 | −0.142824 | 0.0362* | |
H2b | 0.027077 | 0.25 | −0.17208 | 0.0362* | |
H3a | −0.021813 | 0.210856 | 0.015603 | 0.0304* | |
H3b | 0.11002 | 0.188634 | −0.070414 | 0.0304* | |
H4a | 0.081224 | 0.172204 | 0.202722 | 0.0263* | |
H4b | 0.248999 | 0.181858 | 0.260948 | 0.0263* | |
H8 | 0.442701 | 0.046769 | −0.034967 | 0.0271* | |
H10 | 0.083356 | 0.101481 | 0.176454 | 0.0253* | |
H12a | 0.59744 | 0.16367 | −0.185502 | 0.041* | |
H12b | 0.734431 | 0.138538 | −0.255938 | 0.041* | |
H12c | 0.551668 | 0.126314 | −0.274392 | 0.041* | |
H13a | 0.751922 | 0.153186 | 0.024643 | 0.0407* | |
H13b | 0.771525 | 0.109711 | 0.085441 | 0.0407* | |
H13c | 0.877797 | 0.122826 | −0.036879 | 0.0407* | |
H14a | 0.796577 | 0.070049 | −0.187653 | 0.0484* | |
H14b | 0.711271 | 0.04983 | −0.064775 | 0.0484* | |
H14c | 0.614427 | 0.056424 | −0.197596 | 0.0484* | |
H15a | 0.010043 | −0.001985 | 0.160156 | 0.0585* | |
H15b | 0.067158 | 0.033969 | 0.25087 | 0.0585* | |
H15c | −0.041734 | 0.042506 | 0.125745 | 0.0585* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0244 (4) | 0.0180 (4) | 0.0289 (5) | −0.0026 (3) | 0.0051 (3) | −0.0005 (3) |
O2 | 0.0366 (5) | 0.0176 (4) | 0.0502 (6) | −0.0053 (3) | 0.0152 (3) | −0.0021 (3) |
N1 | 0.0249 (4) | 0.0159 (4) | 0.0180 (5) | 0.0012 (3) | 0.0013 (3) | 0.0002 (3) |
C1 | 0.0219 (6) | 0.0169 (6) | 0.0175 (7) | 0 | 0.0009 (5) | 0 |
C2 | 0.0451 (9) | 0.0234 (7) | 0.0220 (8) | 0 | −0.0092 (6) | 0 |
C3 | 0.0336 (6) | 0.0185 (5) | 0.0239 (5) | −0.0007 (4) | −0.0056 (4) | −0.0031 (4) |
C4 | 0.0271 (5) | 0.0174 (5) | 0.0213 (5) | 0.0011 (3) | 0.0042 (4) | 0.0025 (4) |
C5 | 0.0220 (5) | 0.0188 (5) | 0.0180 (5) | 0.0020 (3) | −0.0016 (3) | 0.0024 (3) |
C6 | 0.0207 (5) | 0.0183 (5) | 0.0176 (5) | −0.0007 (3) | −0.0023 (4) | 0.0018 (3) |
C7 | 0.0203 (5) | 0.0220 (5) | 0.0167 (5) | 0.0022 (3) | −0.0025 (3) | 0.0004 (3) |
C8 | 0.0254 (5) | 0.0188 (5) | 0.0236 (5) | 0.0035 (4) | 0.0001 (4) | −0.0011 (4) |
C9 | 0.0263 (5) | 0.0181 (5) | 0.0263 (6) | −0.0020 (4) | −0.0001 (4) | 0.0022 (4) |
C10 | 0.0205 (5) | 0.0208 (5) | 0.0221 (5) | 0.0007 (3) | 0.0008 (4) | 0.0034 (3) |
C11 | 0.0210 (5) | 0.0239 (5) | 0.0195 (5) | 0.0012 (4) | 0.0011 (4) | −0.0010 (4) |
C12 | 0.0244 (5) | 0.0374 (5) | 0.0202 (5) | 0.0025 (4) | 0.0024 (4) | 0.0034 (4) |
C13 | 0.0199 (5) | 0.0395 (6) | 0.0220 (5) | 0.0003 (4) | 0.0005 (4) | −0.0012 (4) |
C14 | 0.0290 (5) | 0.0293 (5) | 0.0386 (7) | 0.0041 (4) | 0.0097 (5) | −0.0059 (4) |
C15 | 0.0367 (6) | 0.0233 (5) | 0.0570 (8) | −0.0070 (4) | 0.0153 (5) | 0.0034 (5) |
O1—C6 | 1.3762 (11) | C7—C8 | 1.3899 (13) |
O1—H1 | 0.890 (15) | C7—C11 | 1.5379 (13) |
O2—C9 | 1.3743 (12) | C8—C9 | 1.3958 (14) |
O2—C15 | 1.4190 (14) | C8—H8 | 0.96 |
N1—C1 | 1.4555 (10) | C9—C10 | 1.3821 (13) |
N1—C3 | 1.4696 (13) | C10—H10 | 0.96 |
N1—C4 | 1.4736 (11) | C11—C12 | 1.5358 (14) |
C1—H1a | 0.96 | C11—C13 | 1.5353 (14) |
C1—H1b | 0.96 | C11—C14 | 1.5306 (14) |
C2—C3 | 1.5211 (12) | C12—H12a | 0.96 |
C2—C3i | 1.5211 (12) | C12—H12b | 0.96 |
C2—H2a | 0.96 | C12—H12c | 0.96 |
C2—H2b | 0.96 | C13—H13a | 0.96 |
C3—H3a | 0.96 | C13—H13b | 0.96 |
C3—H3b | 0.96 | C13—H13c | 0.96 |
C4—C5 | 1.5100 (12) | C14—H14a | 0.96 |
C4—H4a | 0.96 | C14—H14b | 0.96 |
C4—H4b | 0.96 | C14—H14c | 0.96 |
C5—C6 | 1.3993 (13) | C15—H15a | 0.96 |
C5—C10 | 1.3966 (12) | C15—H15b | 0.96 |
C6—C7 | 1.4103 (13) | C15—H15c | 0.96 |
C6—O1—H1 | 104.8 (10) | C7—C8—H8 | 118.9115 |
C9—O2—C15 | 117.23 (8) | C9—C8—H8 | 118.9125 |
C1—N1—C3 | 110.33 (7) | O2—C9—C8 | 115.22 (8) |
C1—N1—C4 | 110.60 (8) | O2—C9—C10 | 124.76 (9) |
C3—N1—C4 | 111.94 (7) | C8—C9—C10 | 120.02 (8) |
N1—C1—N1i | 109.94 (10) | C5—C10—C9 | 119.37 (9) |
N1—C1—H1a | 109.4711 | C5—C10—H10 | 120.3163 |
N1—C1—H1b | 109.4713 | C9—C10—H10 | 120.3168 |
N1i—C1—H1a | 109.4711 | C7—C11—C12 | 110.78 (8) |
N1i—C1—H1b | 109.4713 | C7—C11—C13 | 109.09 (8) |
H1a—C1—H1b | 108.995 | C7—C11—C14 | 112.16 (8) |
C3—C2—C3i | 110.20 (11) | C12—C11—C13 | 109.63 (8) |
C3—C2—H2a | 109.4711 | C12—C11—C14 | 107.38 (8) |
C3—C2—H2b | 109.4714 | C13—C11—C14 | 107.72 (8) |
C3i—C2—H2a | 109.4711 | C11—C12—H12a | 109.4717 |
C3i—C2—H2b | 109.4714 | C11—C12—H12b | 109.472 |
H2a—C2—H2b | 108.7329 | C11—C12—H12c | 109.4713 |
N1—C3—C2 | 109.43 (9) | H12a—C12—H12b | 109.4696 |
N1—C3—H3a | 109.4709 | H12a—C12—H12c | 109.4713 |
N1—C3—H3b | 109.4712 | H12b—C12—H12c | 109.4714 |
C2—C3—H3a | 109.4713 | C11—C13—H13a | 109.4718 |
C2—C3—H3b | 109.4714 | C11—C13—H13b | 109.4714 |
H3a—C3—H3b | 109.5159 | C11—C13—H13c | 109.4712 |
N1—C4—C5 | 112.83 (8) | H13a—C13—H13b | 109.4709 |
N1—C4—H4a | 109.4712 | H13a—C13—H13c | 109.4705 |
N1—C4—H4b | 109.4728 | H13b—C13—H13c | 109.4715 |
C5—C4—H4a | 109.4707 | C11—C14—H14a | 109.4717 |
C5—C4—H4b | 109.4701 | C11—C14—H14b | 109.4711 |
H4a—C4—H4b | 105.8863 | C11—C14—H14c | 109.4716 |
C4—C5—C6 | 120.76 (8) | H14a—C14—H14b | 109.4711 |
C4—C5—C10 | 118.83 (8) | H14a—C14—H14c | 109.4707 |
C6—C5—C10 | 120.29 (8) | H14b—C14—H14c | 109.4712 |
O1—C6—C5 | 119.44 (8) | O2—C15—H15a | 109.4715 |
O1—C6—C7 | 119.68 (8) | O2—C15—H15b | 109.4712 |
C5—C6—C7 | 120.88 (8) | O2—C15—H15c | 109.4719 |
C6—C7—C8 | 117.26 (8) | H15a—C15—H15b | 109.4706 |
C6—C7—C11 | 121.53 (8) | H15a—C15—H15c | 109.4704 |
C8—C7—C11 | 121.18 (8) | H15b—C15—H15c | 109.4716 |
C7—C8—C9 | 122.18 (8) | ||
C15—O2—C9—C8 | 175.19 (9) | O1—C6—C7—C11 | 2.32 (13) |
C15—O2—C9—C10 | −4.54 (15) | C5—C6—C7—C8 | 0.56 (14) |
C3—N1—C1—N1i | −62.71 (10) | C5—C6—C7—C11 | −177.47 (9) |
C4—N1—C1—N1i | 172.88 (8) | C6—C7—C8—C9 | −0.03 (15) |
C1—N1—C3—C2 | 58.60 (11) | C11—C7—C8—C9 | 178.01 (9) |
C4—N1—C3—C2 | −177.78 (8) | C6—C7—C11—C12 | −61.16 (11) |
C1—N1—C4—C5 | −165.79 (8) | C6—C7—C11—C13 | 59.62 (11) |
C3—N1—C4—C5 | 70.73 (10) | C6—C7—C11—C14 | 178.86 (9) |
C3i—C2—C3—N1 | −54.82 (13) | C8—C7—C11—C12 | 120.88 (10) |
N1—C4—C5—C6 | 43.06 (12) | C8—C7—C11—C13 | −118.34 (10) |
N1—C4—C5—C10 | −140.83 (9) | C8—C7—C11—C14 | 0.91 (13) |
C4—C5—C6—O1 | −4.30 (14) | C7—C8—C9—O2 | 179.76 (9) |
C4—C5—C6—C7 | 175.48 (9) | C7—C8—C9—C10 | −0.50 (15) |
C10—C5—C6—O1 | 179.64 (9) | O2—C9—C10—C5 | −179.80 (10) |
C10—C5—C6—C7 | −0.58 (14) | C8—C9—C10—C5 | 0.49 (15) |
C4—C5—C10—C9 | −176.10 (9) | H1—O1—C6—C5 | −16.4 (9) |
C6—C5—C10—C9 | 0.03 (15) | H1—O1—C6—C7 | 163.8 (9) |
O1—C6—C7—C8 | −179.65 (8) |
Symmetry code: (i) x, −y+1/2, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.890 (15) | 1.843 (15) | 2.6735 (10) | 154.6 (14) |
C12—H12a···O1 | 0.96 | 2.36 | 3.0103 (12) | 124.92 |
C13—H13a···O1 | 0.96 | 2.38 | 2.9943 (12) | 121.18 |
Experimental details
Crystal data | |
Chemical formula | C28H42N2O4·0.19H2O |
Mr | 473.5 |
Crystal system, space group | Orthorhombic, Pnma |
Temperature (K) | 120 |
a, b, c (Å) | 8.2265 (1), 33.0103 (2), 10.0322 (5) |
V (Å3) | 2724.34 (14) |
Z | 4 |
Radiation type | Cu Kα |
µ (mm−1) | 0.61 |
Crystal size (mm) | 0.42 × 0.36 × 0.30 |
Data collection | |
Diffractometer | Agilent Xcalibur diffractometer with an Atlas (Gemini ultra Cu) detector |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2010) |
Tmin, Tmax | 0.073, 1 |
No. of measured, independent and observed [I > 3σ(I)] reflections | 54017, 2456, 2353 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.597 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.122, 2.64 |
No. of reflections | 2456 |
No. of parameters | 164 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.17, −0.14 |
Computer programs: CrysAlis PRO (Agilent, 2010), SIR2002 (Burla et al., 2003), JANA2006 (Petříček et al., 2006), DIAMOND (Brandenburg & Putz, 2005).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.890 (15) | 1.843 (15) | 2.6735 (10) | 154.6 (14) |
Acknowledgements
We acknowledge the Dirección de Investigaciones, Sede Bogotá (DIB) de la Universidad Nacional de Colombia, for financial support of this work, as well as the Institutional research plan No. AVOZ10100521 of the Institute of Physics and the project Praemium Academiae of the Academy of Sciences of the Czech Republic. DMG acknowledges the Vicerrectoría Académica de la Universidad Nacional de Colombia for a fellowship.
References
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The asymmetric unit (Fig. 1), contains a one symmetry independent half molecule of 2,2'-(dihydropyrimidine-1,3(2H,4H)-diyldimethanediyl)bis(6-tertbutyl-4-methoxyphenol) and a solvent water molecule with occupany 0.095. The molecule lies on a mirror plane perpendicular to [0,1,0] which passes through the central C atom of the heterocyclic system. In Fig. 1 primed atoms were positioned on the other half of the molecules and had symmetry codes (x, 1/2 - y, z). The hexahydropyrimidine ring of the title compound adopts a chair conformation with a diequatorial substitution (Cremer & Pople, 1975) with puckering parameters Q, θ and ϕ of 0.5891 (10) Å, 3.01 (11)°, 60.0 (18)°. In the molecule of the title compound (Fig. 1), bond lengths (Allen et al., 1987) and angles are normal and comparable to the related structure namely 2,2'-(dihydropyrimidine-1,3(2H,4H)-diyldimethanediyl)bis (6-methylphenol) whose crystallographic data have been deposited at the Cambridge Crystallographic Data Center. The CCDC deposition number is 854735 (Rivera et al.,2012a). However a careful comparison with the values of the corresponding angles and bond distances in the related structure (Rivera, et al. 2012a), indicated that the O1—C6—C7 angle increase by 1.82°. The crystal structure of the title confirms the presence of two O—H···N(1,3-diazinane) hydrogen bond with graph-set motif S(6) (Bernstein et al. 1995) (Table 1). The N···O distance [N1···O1, 2.6735 (10) Å] is shorter in comparison with the values observed in related structure (Rivera, et al. 2012a), showing a slightly increase in hydrogen-bonding strength.
The most obvious difference between the title compound and the related structure (Rivera, et al. 2012a) is the presence of mirror symmetry in the solid state with molecules bisected by mirror planes (the C1 and C2 atoms of the 1,3-diazinane ring lie on the mirror plane). The partially occupied water molecule also is located on this mirror plane. Another important difference is observed in the dihedral angle between the phenyl rings, which is -17.711 (30)° for the title compound and 58.431 (38)° for related structure (Rivera, et al. 2012a). The deviation of the dihedral angle in (I) is probably due to repulsive interactions between the tert-butyl groups.
Fig 2. shows the crystal packing with channels extended along the [1,0,1] axis and accommodating the water molecules. Each channel is composed of two symmetry equivalent positions of the organic molecule. No remarkable intermolecular contacts exist in the presented structure.