metal-organic compounds
Diaquadichloridobis[quinazolin-4(1H)-one-κN3]copper(II)
aS.Yunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of Uzbekistan, Mirzo Ulugbek Str. 77, Tashkent 100170, Uzbekistan, and bTashkent State Pedagogical University Named After Nizami, Yusuf Khos Khojib Str. 103, Tashkent 100100, Uzbekistan
*Correspondence e-mail: kk_turgunov@rambler.ru
In the title complex, [CuCl2(C8H6N2O)2(H2O)2], the CuII ion is located on an inversion center and is octahedrally coordinated by two N atoms of the 1H-quinazolin-4-one ligand, two chloride ligands and two aqua ligands. The axial Cu—O distances are significantly longer [2.512 (2) Å], than the Cu—N [2.022 (2) Å] and Cu—Cl [2.3232 (4) Å] distances as a result of Jahn–Teller distortion. Aqua ligands are involved in intra- and intermolecular hydrogen bonding, and N—H⋯O intermolecular hydrogen bonds are formed between the organic ligands. In addition, weak π–π interactions are observed between the benzene rings of the ligand [centroid–centroid distance = 3.678 (1) Å].
Related literature
The H)-one was reported by Vaillancourt et al. (1998). For a Cd(II) coordination polymer with quinazolin-4(3H)-one, see: Turgunov & Englert (2010). For computational studies of quinazolin-4-one derivatives, see: Bakalova et al. (2004).
of pyrimidin-4(3Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Oxford Diffraction, 2007); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP (Bruker, 1998); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536810048890/nk2075sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810048890/nk2075Isup2.hkl
A solution of 17.05 mg (0.1 mmol) of copper(II) chloride dihydrate in 2 ml of water was added to a solution of 29.23 mg (0.2 mmol) of 3H-quinazolin-4-one in 5 ml of ethanol. The solution allowed to stand at room temperature for one week, after which light-blue crystals were obtained.
C-bound H atoms were positioned geometrically and treated as riding on their C atoms, with C—H distances of 0.93 Å (aromatic) and were refined with Uiso(H)=1.2Ueq(C). N-bound H atoms and water H atoms involved in the intermolecular hydrogen bonding were found by difference Fourier synthesis and refined isotropically with a distance restrains of 0.87 (2) and 0.85 (2) Å, respectively [N—H =0.84 (2) Å, O1w—H1w=0.84 (2) Å, O1w—H2w=0.85 (2) Å].
In solutions, 4-quinazolinone could have in principle three isomers—1H, 3H, and 4-OH, as shown in Figure 1, with preference of 3H-tautomer. Recently, the
of a CdII coordination complex has been reported, in which 3H-quinazolin-4-one (3H-tautomer) acted as a ligand (Turgunov & Englert, 2010). We now report the structure of a CuII complex in which 1H-quinazolin-4-one (1H-tautomer) acts as a ligand.In the title compound, CuII ion is located on the inversion center and has an octahedral coordination environment: two ligands coordinated via N atoms in position 3, two chloride ligands and two aqua ligands (Figure 2). The distances between Cu and coordination atoms are the following: d(Cu—N3) = 2.022 (2) Å, d(Cu—Cl) = 2.3232 (4) Å and d(Cu—Ow) = 2.512 (2) Å. Long distances of metal-aqua bonds than other four coordination bonds indicate existence of the Jahn-Teller elongation effect.
Aqua ligands are involved in intramolecular and intermolecular hydrogen bonding. Intramoleculer H-bonding is occurring with carbonyl group of the ligand. An intermolecular H-bonding of aqua and chloride ligands gives raise to chains along [001] (Figure 3). In addition, between ligand and water molecules are formed weak C–H···O hydrogen bonds. Intermolecular N—H···O and N—H···Cl hydrogen bonds formed between the organic and chloride ligands link molecular complexes into hydrogen-bonded chains along [100] (Figure 4; Table 1). Weak π···π ring interactions connect the molecular complexes along [010] and [001] directions. [Cg1···Cg1vi=3.678 (1) Å, where Cg1=C4A–C5–C6–C7–C8–C8A; vi = x, 3/2 - y, 1/2 + z].
The
of pyrimidin-4(3H)-one was reported by Vaillancourt et al. (1998). For a Cd(II) coordination polymer with quinazolin-4(3H)-one, see: Turgunov & Englert (2010). For computational studies of quinazolin-4-one derivatives, see: Bakalova et al. (2004).Data collection: CrysAlis PRO (Oxford Diffraction, 2007); cell
CrysAlis PRO (Oxford Diffraction, 2007); data reduction: CrysAlis PRO (Oxford Diffraction, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP (Bruker, 1998); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. The 3H, 1H and 4-OH tautomers of 4-quinazolinone. | |
Fig. 2. The molecular structure of the title complex with the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. | |
Fig. 3. Crystal packing of the title compound viewed along the a axis, showing the formation of a hydrogen-bonded chain along [001]. Molecular complexes are furhter linked by π–π stacking interactions, formed between ligands, along [010] and [001] directions [Cg1···Cg1vi=3.678 (1) Å]. | |
Fig. 4. Part of the crystal structure of the title compound showing the formation of a hydrogen-bonded chain along [100]. |
[CuCl2(C8H6N2O)2(H2O)2] | F(000) = 470 |
Mr = 462.77 | Dx = 1.813 Mg m−3 |
Monoclinic, P21/c | Cu Kα radiation, λ = 1.54180 Å |
Hall symbol: -P 2ybc | Cell parameters from 4533 reflections |
a = 6.7438 (3) Å | θ = 4.8–75.3° |
b = 18.5328 (8) Å | µ = 5.03 mm−1 |
c = 6.7831 (3) Å | T = 293 K |
β = 90.735 (3)° | Prism, light-blue |
V = 847.69 (6) Å3 | 0.55 × 0.35 × 0.20 mm |
Z = 2 |
Oxford Diffraction Xcalibur Ruby diffractometer | 1725 independent reflections |
Radiation source: Enhance (Cu) X-ray Source | 1639 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.040 |
Detector resolution: 10.2576 pixels mm-1 | θmax = 77.1°, θmin = 4.8° |
ω scans | h = −5→8 |
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2007) | k = −23→22 |
Tmin = 0.366, Tmax = 1.000 | l = −8→8 |
5548 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.032 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.089 | w = 1/[σ2(Fo2) + (0.0535P)2 + 0.3464P] where P = (Fo2 + 2Fc2)/3 |
S = 1.10 | (Δ/σ)max < 0.001 |
1725 reflections | Δρmax = 0.37 e Å−3 |
137 parameters | Δρmin = −0.46 e Å−3 |
3 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0067 (7) |
[CuCl2(C8H6N2O)2(H2O)2] | V = 847.69 (6) Å3 |
Mr = 462.77 | Z = 2 |
Monoclinic, P21/c | Cu Kα radiation |
a = 6.7438 (3) Å | µ = 5.03 mm−1 |
b = 18.5328 (8) Å | T = 293 K |
c = 6.7831 (3) Å | 0.55 × 0.35 × 0.20 mm |
β = 90.735 (3)° |
Oxford Diffraction Xcalibur Ruby diffractometer | 1725 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2007) | 1639 reflections with I > 2σ(I) |
Tmin = 0.366, Tmax = 1.000 | Rint = 0.040 |
5548 measured reflections |
R[F2 > 2σ(F2)] = 0.032 | 3 restraints |
wR(F2) = 0.089 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.10 | Δρmax = 0.37 e Å−3 |
1725 reflections | Δρmin = −0.46 e Å−3 |
137 parameters |
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 > 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. |
x | y | z | Uiso*/Ueq | ||
Cu1 | 0.0000 | 0.5000 | 0.5000 | 0.02135 (17) | |
Cl1 | 0.20934 (7) | 0.45671 (2) | 0.74764 (6) | 0.02750 (17) | |
O1 | −0.12427 (19) | 0.66628 (7) | 0.5870 (2) | 0.0280 (3) | |
N1 | 0.4508 (2) | 0.65113 (9) | 0.4461 (2) | 0.0227 (3) | |
C2 | 0.3358 (3) | 0.59405 (10) | 0.4636 (3) | 0.0229 (4) | |
H2A | 0.3936 | 0.5490 | 0.4458 | 0.028* | |
N3 | 0.1427 (2) | 0.59595 (8) | 0.5049 (2) | 0.0209 (3) | |
C4 | 0.0522 (3) | 0.66252 (9) | 0.5382 (3) | 0.0198 (4) | |
C4A | 0.1738 (3) | 0.72721 (10) | 0.5123 (2) | 0.0196 (4) | |
C5 | 0.0922 (3) | 0.79617 (10) | 0.5345 (3) | 0.0239 (4) | |
H5A | −0.0399 | 0.8014 | 0.5693 | 0.029* | |
C6 | 0.2088 (3) | 0.85635 (11) | 0.5046 (3) | 0.0288 (4) | |
H6A | 0.1540 | 0.9022 | 0.5167 | 0.035* | |
C7 | 0.4101 (3) | 0.84875 (11) | 0.4560 (3) | 0.0311 (4) | |
H7A | 0.4871 | 0.8897 | 0.4363 | 0.037* | |
C8 | 0.4945 (3) | 0.78128 (11) | 0.4373 (3) | 0.0276 (4) | |
H8A | 0.6278 | 0.7764 | 0.4064 | 0.033* | |
C8A | 0.3762 (3) | 0.72057 (10) | 0.4656 (2) | 0.0205 (4) | |
O1W | 0.2398 (3) | 0.46004 (9) | 0.2416 (2) | 0.0356 (4) | |
H1W | 0.218 (5) | 0.4172 (11) | 0.274 (5) | 0.057 (10)* | |
H1 | 0.570 (3) | 0.6432 (17) | 0.417 (5) | 0.054 (9)* | |
H2W | 0.219 (6) | 0.462 (2) | 0.118 (3) | 0.065 (10)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.0191 (2) | 0.0140 (2) | 0.0308 (3) | −0.00062 (12) | −0.00334 (16) | 0.00158 (13) |
Cl1 | 0.0262 (3) | 0.0276 (3) | 0.0286 (3) | 0.00254 (16) | −0.00262 (18) | 0.00244 (16) |
O1 | 0.0175 (6) | 0.0225 (7) | 0.0441 (8) | 0.0005 (5) | 0.0050 (5) | −0.0008 (6) |
N1 | 0.0149 (7) | 0.0243 (8) | 0.0290 (8) | 0.0010 (6) | 0.0006 (6) | 0.0016 (6) |
C2 | 0.0209 (8) | 0.0190 (8) | 0.0289 (9) | 0.0025 (7) | −0.0013 (7) | 0.0001 (7) |
N3 | 0.0189 (7) | 0.0161 (7) | 0.0278 (7) | 0.0015 (5) | −0.0009 (6) | 0.0013 (6) |
C4 | 0.0198 (8) | 0.0170 (8) | 0.0224 (8) | −0.0001 (6) | −0.0017 (6) | −0.0003 (6) |
C4A | 0.0196 (8) | 0.0200 (8) | 0.0191 (7) | −0.0005 (6) | −0.0020 (6) | −0.0002 (6) |
C5 | 0.0256 (9) | 0.0208 (9) | 0.0253 (9) | 0.0006 (7) | −0.0017 (7) | −0.0013 (7) |
C6 | 0.0395 (11) | 0.0180 (9) | 0.0287 (9) | −0.0010 (8) | −0.0041 (8) | −0.0005 (7) |
C7 | 0.0387 (11) | 0.0230 (10) | 0.0315 (10) | −0.0141 (8) | −0.0021 (8) | 0.0013 (7) |
C8 | 0.0242 (9) | 0.0306 (10) | 0.0280 (9) | −0.0088 (8) | −0.0003 (7) | 0.0016 (8) |
C8A | 0.0205 (8) | 0.0218 (9) | 0.0192 (7) | −0.0024 (7) | −0.0027 (6) | 0.0006 (6) |
O1W | 0.0416 (9) | 0.0273 (8) | 0.0380 (9) | 0.0003 (6) | 0.0032 (7) | −0.0016 (6) |
Cu1—N3 | 2.0221 (15) | C4A—C5 | 1.400 (3) |
Cu1—N3i | 2.0221 (15) | C4A—C8A | 1.410 (3) |
Cu1—Cl1 | 2.3232 (4) | C5—C6 | 1.381 (3) |
Cu1—Cl1i | 2.3232 (4) | C5—H5A | 0.9300 |
O1—C4 | 1.241 (2) | C6—C7 | 1.409 (3) |
N1—C2 | 1.318 (2) | C6—H6A | 0.9300 |
N1—C8A | 1.389 (2) | C7—C8 | 1.380 (3) |
N1—H1 | 0.841 (18) | C7—H7A | 0.9300 |
C2—N3 | 1.336 (2) | C8—C8A | 1.394 (3) |
C2—H2A | 0.9300 | C8—H8A | 0.9300 |
N3—C4 | 1.396 (2) | O1W—H1W | 0.837 (18) |
C4—C4A | 1.464 (2) | O1W—H2W | 0.848 (19) |
N3—Cu1—N3i | 180.0 | C5—C4A—C4 | 120.84 (16) |
N3—Cu1—Cl1 | 90.40 (4) | C8A—C4A—C4 | 120.04 (16) |
N3i—Cu1—Cl1 | 89.60 (4) | C6—C5—C4A | 119.75 (18) |
N3—Cu1—Cl1i | 89.60 (4) | C6—C5—H5A | 120.1 |
N3i—Cu1—Cl1i | 90.40 (4) | C4A—C5—H5A | 120.1 |
Cl1—Cu1—Cl1i | 180.0 | C5—C6—C7 | 120.38 (19) |
C2—N1—C8A | 121.43 (15) | C5—C6—H6A | 119.8 |
C2—N1—H1 | 116 (2) | C7—C6—H6A | 119.8 |
C8A—N1—H1 | 122 (2) | C8—C7—C6 | 120.79 (17) |
N1—C2—N3 | 125.02 (16) | C8—C7—H7A | 119.6 |
N1—C2—H2A | 117.5 | C6—C7—H7A | 119.6 |
N3—C2—H2A | 117.5 | C7—C8—C8A | 118.77 (18) |
C2—N3—C4 | 119.11 (15) | C7—C8—H8A | 120.6 |
C2—N3—Cu1 | 116.00 (12) | C8A—C8—H8A | 120.6 |
C4—N3—Cu1 | 124.80 (12) | N1—C8A—C8 | 121.77 (17) |
O1—C4—N3 | 121.02 (16) | N1—C8A—C4A | 117.05 (15) |
O1—C4—C4A | 121.77 (16) | C8—C8A—C4A | 121.17 (17) |
N3—C4—C4A | 117.21 (15) | H1W—O1W—H2W | 106 (3) |
C5—C4A—C8A | 119.11 (16) |
Symmetry code: (i) −x, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1W···O1i | 0.84 (2) | 1.92 (3) | 2.732 (2) | 162 (3) |
O1W—H2W···Cl1ii | 0.85 (2) | 2.51 (2) | 3.355 (2) | 171 (4) |
N1—H1···O1iii | 0.84 (2) | 2.39 (3) | 3.022 (2) | 133 (3) |
N1—H1···Cl1iv | 0.84 (2) | 2.63 (3) | 3.324 (2) | 140 (3) |
C2—H2A···O1W | 0.93 | 2.38 | 2.972 (3) | 121 |
C7—H7A···O1Wv | 0.93 | 2.57 | 3.421 (3) | 152 |
Symmetry codes: (i) −x, −y+1, −z+1; (ii) x, y, z−1; (iii) x+1, y, z; (iv) −x+1, −y+1, −z+1; (v) −x+1, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | [CuCl2(C8H6N2O)2(H2O)2] |
Mr | 462.77 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 6.7438 (3), 18.5328 (8), 6.7831 (3) |
β (°) | 90.735 (3) |
V (Å3) | 847.69 (6) |
Z | 2 |
Radiation type | Cu Kα |
µ (mm−1) | 5.03 |
Crystal size (mm) | 0.55 × 0.35 × 0.20 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur Ruby |
Absorption correction | Multi-scan (CrysAlis PRO; Oxford Diffraction, 2007) |
Tmin, Tmax | 0.366, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5548, 1725, 1639 |
Rint | 0.040 |
(sin θ/λ)max (Å−1) | 0.632 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.032, 0.089, 1.10 |
No. of reflections | 1725 |
No. of parameters | 137 |
No. of restraints | 3 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.37, −0.46 |
Computer programs: CrysAlis PRO (Oxford Diffraction, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP (Bruker, 1998), publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1W···O1i | 0.84 (2) | 1.92 (3) | 2.732 (2) | 162 (3) |
O1W—H2W···Cl1ii | 0.85 (2) | 2.51 (2) | 3.355 (2) | 171 (4) |
N1—H1···O1iii | 0.84 (2) | 2.39 (3) | 3.022 (2) | 133 (3) |
N1—H1···Cl1iv | 0.84 (2) | 2.63 (3) | 3.324 (2) | 140 (3) |
C2—H2A···O1W | 0.9300 | 2.3800 | 2.972 (3) | 121.00 |
C7—H7A···O1Wv | 0.9300 | 2.5700 | 3.421 (3) | 152.00 |
Symmetry codes: (i) −x, −y+1, −z+1; (ii) x, y, z−1; (iii) x+1, y, z; (iv) −x+1, −y+1, −z+1; (v) −x+1, y+1/2, −z+1/2. |
Acknowledgements
We thank the Academy of Sciences of the Republic of Uzbekistan for supporting this study (grant FA–F3–T045).
References
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In solutions, 4-quinazolinone could have in principle three isomers—1H, 3H, and 4-OH, as shown in Figure 1, with preference of 3H-tautomer. Recently, the crystal structure of a CdII coordination complex has been reported, in which 3H-quinazolin-4-one (3H-tautomer) acted as a ligand (Turgunov & Englert, 2010). We now report the structure of a CuII complex in which 1H-quinazolin-4-one (1H-tautomer) acts as a ligand.
In the title compound, CuII ion is located on the inversion center and has an octahedral coordination environment: two ligands coordinated via N atoms in position 3, two chloride ligands and two aqua ligands (Figure 2). The distances between Cu and coordination atoms are the following: d(Cu—N3) = 2.022 (2) Å, d(Cu—Cl) = 2.3232 (4) Å and d(Cu—Ow) = 2.512 (2) Å. Long distances of metal-aqua bonds than other four coordination bonds indicate existence of the Jahn-Teller elongation effect.
Aqua ligands are involved in intramolecular and intermolecular hydrogen bonding. Intramoleculer H-bonding is occurring with carbonyl group of the ligand. An intermolecular H-bonding of aqua and chloride ligands gives raise to chains along [001] (Figure 3). In addition, between ligand and water molecules are formed weak C–H···O hydrogen bonds. Intermolecular N—H···O and N—H···Cl hydrogen bonds formed between the organic and chloride ligands link molecular complexes into hydrogen-bonded chains along [100] (Figure 4; Table 1). Weak π···π ring interactions connect the molecular complexes along [010] and [001] directions. [Cg1···Cg1vi=3.678 (1) Å, where Cg1=C4A–C5–C6–C7–C8–C8A; vi = x, 3/2 - y, 1/2 + z].