organic compounds
Bis(2-{2-[2-(benzylcarbamoyl)phenoxy]acetamido}ethyl)ammonium nitrate ethanol disolvate
aKey Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People's Republic of China
*Correspondence e-mail: zhanggl@lzu.edu.cn
In the title compound, C36H40N5O6+·NO3−·2C2H5OH, the nitrate anion is disordered over the two orientations of equal occupancy while the solvent molecule reveals large displacement parameters. The cation is formed by protonation of the N atom of a secondary amine in the middle of the flexible chain and the whole compound has crystallographically imposed C-2 symmetry with the crystallographic b axis. An O atom of the nitrate anion links the acidic H atoms of the cation via N—H⋯O hydrogen bonding. In addition, neighbouring cations are connected by intermolecular N—H⋯O hydrogen bonds and π–π interactions between the benzamide groups of the cations [centroid–centroid distance = 4.000 (3) Å], forming a chain along [001]. The ethanol solvent molecules are arranged on the side of the chain through O—H⋯O hydrogen bonds.
Related literature
Luminescent lanthanide complexes have attracted intense research interest due to their very narrow emission bands and large Stokes shifts, see: Wang et al. (2009); Bunzli & Piguet (2005); Stein & Wurzberg (1975). For amide-type open-chain ligands, see: Liu et al. (2009); Yi et al. (2007); Hamann et al. (2004).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1997); cell SAINT (Bruker, 1997); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536810052670/kp2291sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810052670/kp2291Isup2.hkl
Ethyl 2-(2-(benzylcarbamoyl)phenoxy)acetate was firstly synthesised as a white solid via a simple prepared by reaction of N-benzylsalicylamide (2.27 g, 10.0 mmol) with ethyl chloroacetate (1.83 g, 15.0 mmol) in 80% yield using an excess amount of anhydrous potassium carbonate in refluxing acetone. Then the ligand, N,N'-iminodiethylenebis{[(2'-benzylaminoformyl)phenoxyl]acetamide}, was obtained in 18% yield by treating the ethyl 2-(2-(benzylcarbamoyl)phenoxy)acetate (1.88 g, 6 mmol) with 0.5 equiv of diethylenetriamine (0.258 g,2.5 mmol) in methanol at 333-338 K for 8 h (m.p. 372-374 K). Single crystals of the title compound suitable for X-ray analysis were obtained by slow evaporation of an ethanol solution (6 mL) containing Tb(NO3)3.6H2O (67.9 mg, 0.15 mmol) and N,N'-iminodiethylenebis{[(2'-benzylaminoformyl)phenoxyl]acetamide} (95.6 mg, 0.15 mmol) after two weeks at room temperature in 75% yield. The preparation was aimed to obtain an Tb(III) nitrate complex with the title ligand but instead the ligand was crystallised.
The nitrate group is disordered over two orientations where oxygen atoms of these two orientations revealed occupancies of 0.50 respectively. Furthermore, the anisotropic displacement parameters of the minor occupancy atoms C19, C20 and O4 of ethanol solvent were constrained by using the SHELX command ISOR and SIMU. The ammonium H atoms were located from the difference Fourier map and refined freely. H atoms were positioned geometrically with N—H = 0.86 for amide. All other H atoms were positioned geometrically with C—H = 0.93 and 0.97 Å for aromatic and methylene H atoms, respectively. They were constrained to ride on their parent atoms with Uiso(H)= 1.2Ueq(C) or 1.5 Ueq(C).
Luminescent lanthanide complexes have attracted intense research interest from both material and biological science mainly due to their very narrow emission bands and large Stokes shifts, etc (Wang et al., 2009; Bunzli & Piguet, 2005; Stein & Wurzberg, 1975). Since the lanthanides have low absorptivities and poor quantum yields, fluorescence enhancement has generally been achieved through ligand sensitisation. Among various kinds of ligands, amide type open-chain ligands have drawn much attention in past ten years, mainly due to their flexible structure, selective coordinating capacity and hard binding sites, which could stabilise their lanthanide complexes, acquire novel coordination structure and shield the encapsulated ion from interaction with the surroundings (Liu et al., 2009; Yi et al., 2007; Hamann et al., 2004). There is a need to prepare a new series of amide type ligands to further widen the scope of research on the chemical and physical properties of lanthanide complexes. In this paper, we present the structure of the title compound, a nitrate salt of a free ligand. The π–π interactions between the benzamide groups from cations (Fig. 2). Ethanol molecules are arranged on the side of the chain and linked the O atoms of the acetamide groups via O–H···O hydrogen bonds.
comprises a half of cation C36H40N5O6+ nitrate anion, and ethanol molecule(Fig. 1). In C36H40N5O6+cation, the N atom of secondary amine in the middle of flexible chain is protonated adding more hydrogen bondind donor sites. An O atom of nitrate anion links the acidic H atoms and adjacent one of amide groups via N–H···O hydrogen bonding (Table 1) forming the S-shape organic cation. The carbonyl groups of benzamide at both ends of organic cation are involved in intermolecular N–H···O hydrogen bonds connecting acidic H atoms of neighbouring C36H40N5O6+cations to form a chain. The chain is further stabilised byLuminescent lanthanide complexes have attracted intense research interest due to their very narrow emission bands and large Stokes shifts, see: Wang et al. (2009); Bunzli & Piguet (2005); Stein & Wurzberg (1975). For amide-type open-chain ligands, see: Liu et al. (2009); Yi et al. (2007); Hamann et al. (2004).
Data collection: SMART (Bruker, 1997); cell
SAINT (Bruker, 1997); data reduction: SAINT (Bruker, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. Molecular structure of the title compound. Displacement ellipsoids are drawn at the 30% probability level. Symmetry code used to generate the complete cation: -x, y, -1 - z. | |
Fig. 2. The hydrogen bonded chain dominates the crystal packing. Hydrogen bonds are shown as turquiose dashed lines. H atoms not involved in hydrogen bonding have been omitted for clarity. The π···π interactions between benzamide groups are shown as light-blue dashed lines. |
C36H40N5O6+·NO3−·2C2H6O | F(000) = 844 |
Mr = 792.88 | Dx = 1.281 Mg m−3 |
Monoclinic, C2 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: C2y | Cell parameters from 1019 reflections |
a = 16.978 (3) Å | θ = 2.5–20.9° |
b = 11.405 (2) Å | µ = 0.09 mm−1 |
c = 11.164 (2) Å | T = 296 K |
β = 108.04 (3)° | Block, colourless |
V = 2055.6 (7) Å3 | 0.22 × 0.18 × 0.17 mm |
Z = 2 |
Bruker SMART CCD area-detector diffractometer | 1995 independent reflections |
Radiation source: fine-focus sealed tube | 1334 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.035 |
φ and ω scans | θmax = 25.5°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Bruker, 1997) | h = −20→20 |
Tmin = 0.980, Tmax = 0.984 | k = −13→13 |
4901 measured reflections | l = −8→13 |
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)] = 0.063 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.190 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.1204P)2] where P = (Fo2 + 2Fc2)/3 |
1995 reflections | (Δ/σ)max < 0.001 |
277 parameters | Δρmax = 0.26 e Å−3 |
45 restraints | Δρmin = −0.32 e Å−3 |
C36H40N5O6+·NO3−·2C2H6O | V = 2055.6 (7) Å3 |
Mr = 792.88 | Z = 2 |
Monoclinic, C2 | Mo Kα radiation |
a = 16.978 (3) Å | µ = 0.09 mm−1 |
b = 11.405 (2) Å | T = 296 K |
c = 11.164 (2) Å | 0.22 × 0.18 × 0.17 mm |
β = 108.04 (3)° |
Bruker SMART CCD area-detector diffractometer | 1995 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 1997) | 1334 reflections with I > 2σ(I) |
Tmin = 0.980, Tmax = 0.984 | Rint = 0.035 |
4901 measured reflections |
R[F2 > 2σ(F2)] = 0.063 | 45 restraints |
wR(F2) = 0.190 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.26 e Å−3 |
1995 reflections | Δρmin = −0.32 e Å−3 |
277 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. The structure is non-centrosymmetric with only atoms lighter than silicon, MoKa measured Friedel data can not be used to determine absolute structure. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
C1 | 0.1027 (3) | 0.7751 (5) | 0.3251 (4) | 0.0729 (14) | |
H1 | 0.0513 | 0.8071 | 0.2823 | 0.088* | |
C2 | 0.1500 (4) | 0.8244 (5) | 0.4399 (4) | 0.0853 (17) | |
H2 | 0.1299 | 0.8878 | 0.4742 | 0.102* | |
C3 | 0.2259 (4) | 0.7777 (5) | 0.5003 (5) | 0.0903 (18) | |
H3 | 0.2585 | 0.8102 | 0.5758 | 0.108* | |
C4 | 0.2544 (4) | 0.6830 (6) | 0.4502 (5) | 0.0860 (17) | |
H4 | 0.3060 | 0.6512 | 0.4923 | 0.103* | |
C5 | 0.2075 (3) | 0.6351 (5) | 0.3391 (4) | 0.0723 (14) | |
H5 | 0.2275 | 0.5708 | 0.3062 | 0.087* | |
C6 | 0.1309 (3) | 0.6806 (4) | 0.2748 (4) | 0.0573 (11) | |
C7 | 0.0779 (3) | 0.6306 (4) | 0.1506 (4) | 0.0614 (12) | |
H7A | 0.0201 | 0.6396 | 0.1453 | 0.074* | |
H7B | 0.0872 | 0.6762 | 0.0828 | 0.074* | |
C8 | 0.0726 (2) | 0.4235 (4) | 0.1984 (3) | 0.0492 (11) | |
C9 | 0.0862 (2) | 0.2966 (4) | 0.1713 (3) | 0.0477 (10) | |
C10 | 0.0729 (3) | 0.2155 (4) | 0.2537 (4) | 0.0645 (13) | |
H10 | 0.0561 | 0.2411 | 0.3210 | 0.077* | |
C11 | 0.0839 (4) | 0.0971 (5) | 0.2393 (5) | 0.0802 (16) | |
H11 | 0.0741 | 0.0441 | 0.2963 | 0.096* | |
C12 | 0.1088 (4) | 0.0581 (5) | 0.1432 (5) | 0.0833 (16) | |
H12 | 0.1161 | −0.0218 | 0.1338 | 0.100* | |
C13 | 0.1236 (3) | 0.1374 (4) | 0.0576 (4) | 0.0739 (14) | |
H13 | 0.1417 | 0.1108 | −0.0081 | 0.089* | |
C14 | 0.1113 (2) | 0.2551 (4) | 0.0710 (3) | 0.0506 (11) | |
C15 | 0.1448 (3) | 0.3013 (4) | −0.1168 (3) | 0.0582 (12) | |
H15A | 0.1031 | 0.2491 | −0.1691 | 0.070* | |
H15B | 0.1973 | 0.2602 | −0.0900 | 0.070* | |
C16 | 0.1516 (3) | 0.4089 (4) | −0.1880 (4) | 0.0583 (12) | |
C17 | 0.1515 (3) | 0.4860 (5) | −0.3908 (4) | 0.0755 (15) | |
H17A | 0.1635 | 0.4531 | −0.4634 | 0.091* | |
H17B | 0.1978 | 0.5355 | −0.3464 | 0.091* | |
C18 | 0.0744 (3) | 0.5599 (4) | −0.4352 (4) | 0.0633 (12) | |
H18A | 0.0655 | 0.5993 | −0.3635 | 0.076* | |
H18B | 0.0820 | 0.6195 | −0.4927 | 0.076* | |
C19 | 0.1576 (7) | 0.8011 (10) | 0.8043 (10) | 0.190 (4) | |
H19A | 0.1167 | 0.7735 | 0.7280 | 0.227* | |
H19B | 0.2120 | 0.7857 | 0.7965 | 0.227* | |
C20 | 0.1476 (8) | 0.9286 (12) | 0.8154 (13) | 0.220 (5) | |
H20A | 0.0967 | 0.9441 | 0.8332 | 0.330* | |
H20B | 0.1462 | 0.9660 | 0.7377 | 0.330* | |
H20C | 0.1932 | 0.9589 | 0.8825 | 0.330* | |
N1 | 0.0936 (2) | 0.5070 (3) | 0.1313 (3) | 0.0555 (9) | |
H1A | 0.1169 | 0.4881 | 0.0756 | 0.067* | |
N2 | 0.1437 (2) | 0.3914 (4) | −0.3083 (3) | 0.0627 (10) | |
H2A | 0.1336 | 0.3217 | −0.3385 | 0.075* | |
N3 | 0.0000 | 0.4879 (5) | −0.5000 | 0.0538 (13) | |
HN3 | −0.004 (2) | 0.437 (4) | −0.435 (4) | 0.061 (12)* | |
N4 | 0.0000 | 0.1418 (5) | 0.5000 | 0.0692 (16) | |
O1 | 0.04311 (19) | 0.4475 (3) | 0.2828 (3) | 0.0665 (9) | |
O2 | 0.1223 (2) | 0.3375 (3) | −0.0115 (2) | 0.0659 (8) | |
O3 | 0.1642 (2) | 0.5043 (4) | −0.1375 (3) | 0.0879 (12) | |
O4 | 0.1490 (5) | 0.7383 (9) | 0.9064 (8) | 0.206 (3) | |
H4A | 0.1549 | 0.6662 | 0.8924 | 0.247* | |
O5 | −0.0303 (5) | 0.2373 (6) | 0.4705 (7) | 0.086 (3) | 0.50 |
O6 | 0.0685 (4) | 0.1426 (7) | 0.5858 (8) | 0.100 (3) | 0.50 |
O7 | −0.0314 (6) | 0.0489 (6) | 0.4703 (11) | 0.133 (4) | 0.50 |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.106 (3) | 0.055 (3) | 0.059 (2) | 0.008 (3) | 0.028 (2) | 0.008 (2) |
C2 | 0.161 (5) | 0.036 (2) | 0.068 (3) | −0.008 (3) | 0.049 (3) | −0.002 (2) |
C3 | 0.118 (4) | 0.083 (4) | 0.061 (3) | −0.036 (3) | 0.016 (3) | 0.004 (3) |
C4 | 0.084 (3) | 0.094 (4) | 0.073 (3) | −0.021 (3) | 0.013 (3) | 0.002 (3) |
C5 | 0.083 (3) | 0.073 (3) | 0.062 (3) | −0.006 (3) | 0.025 (2) | −0.003 (2) |
C6 | 0.084 (3) | 0.049 (2) | 0.0445 (18) | 0.001 (2) | 0.0277 (19) | 0.0087 (18) |
C7 | 0.086 (3) | 0.052 (3) | 0.046 (2) | 0.005 (2) | 0.021 (2) | 0.0030 (19) |
C8 | 0.056 (2) | 0.056 (3) | 0.0357 (17) | 0.001 (2) | 0.0152 (16) | −0.0003 (18) |
C9 | 0.057 (2) | 0.053 (2) | 0.0344 (16) | −0.0033 (19) | 0.0158 (15) | 0.0026 (17) |
C10 | 0.085 (3) | 0.066 (3) | 0.049 (2) | 0.008 (2) | 0.030 (2) | 0.013 (2) |
C11 | 0.122 (4) | 0.068 (3) | 0.056 (2) | −0.004 (3) | 0.035 (3) | 0.013 (2) |
C12 | 0.128 (4) | 0.052 (3) | 0.079 (3) | 0.000 (3) | 0.046 (3) | 0.011 (2) |
C13 | 0.108 (3) | 0.063 (3) | 0.065 (2) | 0.002 (3) | 0.048 (2) | 0.003 (2) |
C14 | 0.065 (2) | 0.050 (2) | 0.0426 (19) | −0.005 (2) | 0.0251 (17) | 0.0017 (18) |
C15 | 0.082 (2) | 0.063 (3) | 0.0391 (17) | 0.005 (2) | 0.0330 (17) | −0.0049 (19) |
C16 | 0.069 (2) | 0.066 (3) | 0.0455 (19) | −0.002 (2) | 0.0255 (18) | 0.004 (2) |
C17 | 0.076 (2) | 0.107 (4) | 0.053 (2) | 0.004 (3) | 0.034 (2) | 0.019 (3) |
C18 | 0.090 (3) | 0.055 (3) | 0.053 (2) | −0.015 (2) | 0.033 (2) | 0.003 (2) |
C19 | 0.183 (6) | 0.205 (8) | 0.190 (7) | −0.004 (7) | 0.071 (6) | 0.009 (7) |
C20 | 0.218 (7) | 0.219 (8) | 0.221 (8) | −0.005 (7) | 0.066 (6) | −0.043 (7) |
N1 | 0.075 (2) | 0.054 (2) | 0.0423 (16) | 0.0008 (18) | 0.0244 (15) | 0.0025 (16) |
N2 | 0.088 (2) | 0.067 (2) | 0.0447 (16) | 0.011 (2) | 0.0376 (15) | 0.0073 (17) |
N3 | 0.078 (3) | 0.051 (3) | 0.038 (2) | 0.000 | 0.027 (2) | 0.000 |
N4 | 0.072 (3) | 0.078 (4) | 0.069 (3) | 0.000 | 0.038 (3) | 0.000 |
O1 | 0.0891 (18) | 0.070 (2) | 0.0545 (14) | −0.0011 (17) | 0.0420 (14) | −0.0032 (15) |
O2 | 0.113 (2) | 0.0502 (18) | 0.0509 (13) | 0.0028 (16) | 0.0492 (14) | 0.0024 (13) |
O3 | 0.125 (3) | 0.080 (2) | 0.0584 (17) | −0.033 (2) | 0.0280 (18) | −0.0035 (18) |
O4 | 0.236 (6) | 0.214 (7) | 0.200 (5) | −0.015 (5) | 0.117 (5) | 0.006 (5) |
O5 | 0.127 (7) | 0.065 (4) | 0.079 (5) | 0.017 (4) | 0.049 (5) | 0.018 (4) |
O6 | 0.113 (5) | 0.063 (5) | 0.138 (7) | 0.013 (5) | 0.061 (5) | −0.002 (5) |
O7 | 0.185 (11) | 0.070 (5) | 0.165 (8) | −0.055 (5) | 0.084 (7) | −0.062 (6) |
C1—C6 | 1.367 (7) | C16—O3 | 1.214 (6) |
C1—C2 | 1.402 (7) | C16—N2 | 1.322 (5) |
C1—H1 | 0.9300 | C17—N2 | 1.452 (6) |
C2—C3 | 1.365 (8) | C17—C18 | 1.506 (7) |
C2—H2 | 0.9300 | C17—H17A | 0.9700 |
C3—C4 | 1.371 (8) | C17—H17B | 0.9700 |
C3—H3 | 0.9300 | C18—N3 | 1.493 (5) |
C4—C5 | 1.364 (7) | C18—H18A | 0.9700 |
C4—H4 | 0.9300 | C18—H18B | 0.9700 |
C5—C6 | 1.378 (6) | C19—O4 | 1.392 (11) |
C5—H5 | 0.9300 | C19—C20 | 1.475 (14) |
C6—C7 | 1.512 (6) | C19—H19A | 0.9700 |
C7—N1 | 1.464 (6) | C19—H19B | 0.9700 |
C7—H7A | 0.9700 | C20—H20A | 0.9600 |
C7—H7B | 0.9700 | C20—H20B | 0.9600 |
C8—O1 | 1.226 (5) | C20—H20C | 0.9600 |
C8—N1 | 1.327 (5) | N1—H1A | 0.8600 |
C8—C9 | 1.511 (6) | N2—H2A | 0.8600 |
C9—C10 | 1.372 (6) | N3—C18i | 1.493 (5) |
C9—C14 | 1.398 (5) | N3—HN3 | 0.95 (4) |
C10—C11 | 1.380 (8) | N4—O7ii | 1.186 (8) |
C10—H10 | 0.9300 | N4—O7 | 1.186 (8) |
C11—C12 | 1.344 (8) | N4—O5ii | 1.205 (8) |
C11—H11 | 0.9300 | N4—O5 | 1.205 (8) |
C12—C13 | 1.395 (7) | N4—O6 | 1.258 (7) |
C12—H12 | 0.9300 | N4—O6ii | 1.258 (7) |
C13—C14 | 1.374 (7) | O4—H4A | 0.8491 |
C13—H13 | 0.9300 | O5—O5ii | 1.035 (14) |
C14—O2 | 1.368 (5) | O5—O6ii | 1.316 (10) |
C15—O2 | 1.406 (5) | O6—O7ii | 1.298 (12) |
C15—C16 | 1.486 (6) | O6—O5ii | 1.316 (10) |
C15—H15A | 0.9700 | O7—O7ii | 1.066 (18) |
C15—H15B | 0.9700 | O7—O6ii | 1.298 (12) |
C6—C1—C2 | 121.2 (5) | O2—C15—H15B | 110.3 |
C6—C1—H1 | 119.4 | C16—C15—H15B | 110.3 |
C2—C1—H1 | 119.4 | H15A—C15—H15B | 108.6 |
C3—C2—C1 | 118.7 (5) | O3—C16—N2 | 123.7 (4) |
C3—C2—H2 | 120.7 | O3—C16—C15 | 121.6 (4) |
C1—C2—H2 | 120.7 | N2—C16—C15 | 114.8 (4) |
C2—C3—C4 | 120.3 (5) | N2—C17—C18 | 112.6 (4) |
C2—C3—H3 | 119.8 | N2—C17—H17A | 109.1 |
C4—C3—H3 | 119.8 | C18—C17—H17A | 109.1 |
C5—C4—C3 | 120.4 (5) | N2—C17—H17B | 109.1 |
C5—C4—H4 | 119.8 | C18—C17—H17B | 109.1 |
C3—C4—H4 | 119.8 | H17A—C17—H17B | 107.8 |
C4—C5—C6 | 120.9 (5) | N3—C18—C17 | 111.7 (4) |
C4—C5—H5 | 119.5 | N3—C18—H18A | 109.3 |
C6—C5—H5 | 119.5 | C17—C18—H18A | 109.3 |
C1—C6—C5 | 118.5 (4) | N3—C18—H18B | 109.3 |
C1—C6—C7 | 119.3 (4) | C17—C18—H18B | 109.3 |
C5—C6—C7 | 122.2 (4) | H18A—C18—H18B | 107.9 |
N1—C7—C6 | 114.5 (4) | O4—C19—C20 | 113.2 (12) |
N1—C7—H7A | 108.6 | O4—C19—H19A | 108.9 |
C6—C7—H7A | 108.6 | C20—C19—H19A | 108.9 |
N1—C7—H7B | 108.6 | O4—C19—H19B | 108.9 |
C6—C7—H7B | 108.6 | C20—C19—H19B | 108.9 |
H7A—C7—H7B | 107.6 | H19A—C19—H19B | 107.7 |
O1—C8—N1 | 121.3 (4) | C19—C20—H20A | 109.5 |
O1—C8—C9 | 119.5 (4) | C19—C20—H20B | 109.5 |
N1—C8—C9 | 119.2 (3) | H20A—C20—H20B | 109.5 |
C10—C9—C14 | 117.6 (4) | C19—C20—H20C | 109.5 |
C10—C9—C8 | 116.4 (4) | H20A—C20—H20C | 109.5 |
C14—C9—C8 | 126.0 (4) | H20B—C20—H20C | 109.5 |
C9—C10—C11 | 121.7 (5) | C8—N1—C7 | 121.0 (4) |
C9—C10—H10 | 119.1 | C8—N1—H1A | 119.5 |
C11—C10—H10 | 119.1 | C7—N1—H1A | 119.5 |
C12—C11—C10 | 120.3 (5) | C16—N2—C17 | 122.1 (4) |
C12—C11—H11 | 119.9 | C16—N2—H2A | 118.9 |
C10—C11—H11 | 119.9 | C17—N2—H2A | 118.9 |
C11—C12—C13 | 120.0 (5) | C18—N3—C18i | 113.2 (5) |
C11—C12—H12 | 120.0 | C18—N3—HN3 | 102 (2) |
C13—C12—H12 | 120.0 | C18i—N3—HN3 | 117 (2) |
C14—C13—C12 | 119.6 (5) | O7ii—N4—O5ii | 127.9 (6) |
C14—C13—H13 | 120.2 | O7—N4—O5 | 127.9 (6) |
C12—C13—H13 | 120.2 | O7—N4—O6 | 116.6 (8) |
O2—C14—C13 | 122.8 (4) | O5—N4—O6 | 114.7 (7) |
O2—C14—C9 | 116.4 (4) | O7ii—N4—O6ii | 116.6 (8) |
C13—C14—C9 | 120.8 (4) | O5ii—N4—O6ii | 114.7 (7) |
O2—C15—C16 | 106.9 (4) | C14—O2—C15 | 119.3 (3) |
O2—C15—H15A | 110.3 | C19—O4—H4A | 107.3 |
C16—C15—H15A | 110.3 | ||
C6—C1—C2—C3 | 1.2 (8) | C12—C13—C14—O2 | −178.0 (4) |
C1—C2—C3—C4 | −1.2 (8) | C12—C13—C14—C9 | 1.7 (7) |
C2—C3—C4—C5 | 0.5 (9) | C10—C9—C14—O2 | 178.5 (4) |
C3—C4—C5—C6 | 0.1 (8) | C8—C9—C14—O2 | −1.8 (5) |
C2—C1—C6—C5 | −0.5 (7) | C10—C9—C14—C13 | −1.2 (6) |
C2—C1—C6—C7 | −179.8 (5) | C8—C9—C14—C13 | 178.5 (4) |
C4—C5—C6—C1 | −0.1 (7) | O2—C15—C16—O3 | 23.1 (6) |
C4—C5—C6—C7 | 179.2 (5) | O2—C15—C16—N2 | −157.5 (4) |
C1—C6—C7—N1 | −155.0 (4) | N2—C17—C18—N3 | −56.5 (5) |
C5—C6—C7—N1 | 25.7 (7) | O1—C8—N1—C7 | −3.7 (5) |
O1—C8—C9—C10 | −7.0 (5) | C9—C8—N1—C7 | 177.2 (3) |
N1—C8—C9—C10 | 172.1 (4) | C6—C7—N1—C8 | 69.5 (5) |
O1—C8—C9—C14 | 173.3 (3) | O3—C16—N2—C17 | 1.6 (7) |
N1—C8—C9—C14 | −7.6 (5) | C15—C16—N2—C17 | −177.8 (4) |
C14—C9—C10—C11 | 0.2 (6) | C18—C17—N2—C16 | −78.9 (5) |
C8—C9—C10—C11 | −179.6 (4) | C17—C18—N3—C18i | −169.9 (4) |
C9—C10—C11—C12 | 0.4 (8) | C13—C14—O2—C15 | 1.8 (6) |
C10—C11—C12—C13 | 0.0 (9) | C9—C14—O2—C15 | −177.9 (3) |
C11—C12—C13—C14 | −1.1 (8) | C16—C15—O2—C14 | 179.8 (3) |
Symmetry codes: (i) −x, y, −z−1; (ii) −x, y, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—HN3···O5iii | 0.95 (4) | 2.49 (5) | 2.905 (9) | 106 (3) |
N3—HN3···O5iv | 0.95 (4) | 2.41 (5) | 2.905 (9) | 112 (3) |
N3—HN3···O1iv | 0.95 (4) | 2.01 (4) | 2.780 (3) | 137 (4) |
O4—H4A···O3v | 0.85 | 1.89 | 2.740 (11) | 178 |
N1—H1A···O2 | 0.86 | 1.99 | 2.645 (5) | 132 |
N2—H2A···O5iv | 0.86 | 2.14 | 2.813 (9) | 135 |
N2—H2A···O6iii | 0.86 | 2.35 | 3.185 (9) | 163 |
Symmetry codes: (iii) x, y, z−1; (iv) −x, y, −z; (v) x, y, z+1. |
Experimental details
Crystal data | |
Chemical formula | C36H40N5O6+·NO3−·2C2H6O |
Mr | 792.88 |
Crystal system, space group | Monoclinic, C2 |
Temperature (K) | 296 |
a, b, c (Å) | 16.978 (3), 11.405 (2), 11.164 (2) |
β (°) | 108.04 (3) |
V (Å3) | 2055.6 (7) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.22 × 0.18 × 0.17 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 1997) |
Tmin, Tmax | 0.980, 0.984 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 4901, 1995, 1334 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.606 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.063, 0.190, 1.03 |
No. of reflections | 1995 |
No. of parameters | 277 |
No. of restraints | 45 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.26, −0.32 |
Computer programs: SMART (Bruker, 1997), SAINT (Bruker, 1997), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—HN3···O5i | 0.95 (4) | 2.49 (5) | 2.905 (9) | 106 (3) |
N3—HN3···O5ii | 0.95 (4) | 2.41 (5) | 2.905 (9) | 112 (3) |
N3—HN3···O1ii | 0.95 (4) | 2.01 (4) | 2.780 (3) | 137 (4) |
O4—H4A···O3iii | 0.85 | 1.89 | 2.740 (11) | 178 |
N1—H1A···O2 | 0.86 | 1.99 | 2.645 (5) | 132 |
N2—H2A···O5ii | 0.86 | 2.14 | 2.813 (9) | 135 |
N2—H2A···O6i | 0.86 | 2.35 | 3.185 (9) | 163 |
Symmetry codes: (i) x, y, z−1; (ii) −x, y, −z; (iii) x, y, z+1. |
Acknowledgements
This work was supported financially by the National Natural Science Foundation of China (grant Nos. 20771048, 20931003, 21001059) and the Fundamental Research Funds for the Central Universities (lzujbky-2009-k06, lzujbky-2009–114).
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Luminescent lanthanide complexes have attracted intense research interest from both material and biological science mainly due to their very narrow emission bands and large Stokes shifts, etc (Wang et al., 2009; Bunzli & Piguet, 2005; Stein & Wurzberg, 1975). Since the lanthanides have low absorptivities and poor quantum yields, fluorescence enhancement has generally been achieved through ligand sensitisation. Among various kinds of ligands, amide type open-chain ligands have drawn much attention in past ten years, mainly due to their flexible structure, selective coordinating capacity and hard binding sites, which could stabilise their lanthanide complexes, acquire novel coordination structure and shield the encapsulated ion from interaction with the surroundings (Liu et al., 2009; Yi et al., 2007; Hamann et al., 2004). There is a need to prepare a new series of amide type ligands to further widen the scope of research on the chemical and physical properties of lanthanide complexes. In this paper, we present the structure of the title compound, a nitrate salt of a free ligand. The asymmetric unit comprises a half of cation C36H40N5O6+ nitrate anion, and ethanol molecule(Fig. 1). In C36H40N5O6+cation, the N atom of secondary amine in the middle of flexible chain is protonated adding more hydrogen bondind donor sites. An O atom of nitrate anion links the acidic H atoms and adjacent one of amide groups via N–H···O hydrogen bonding (Table 1) forming the S-shape organic cation. The carbonyl groups of benzamide at both ends of organic cation are involved in intermolecular N–H···O hydrogen bonds connecting acidic H atoms of neighbouring C36H40N5O6+cations to form a chain. The chain is further stabilised by π–π interactions between the benzamide groups from cations (Fig. 2). Ethanol molecules are arranged on the side of the chain and linked the O atoms of the acetamide groups via O–H···O hydrogen bonds.