metal-organic compounds
Bis(7-amino-2,4-dimethyl-1,8-naphthyridine)dinitratocadmium(II)
aFaculty of Science, Zhejiang Forestry University, Lin'An 311300, People's Republic of China
*Correspondence e-mail: jinsw@zjfc.edu.cn
In the title compound, [Cd(NO3)2(C10H11N3)2], two naphthyridine ring systems are coordinated to the Cd ion through the two N atoms in a bidentate chelating mode, whereas the remaining coordination sites are occupied by two O atoms from two different nitrate groups to complete the octahedral geometry. Intermoleular N—H⋯O hydrogen bonds link the molecules to form a one-dimensionnal sheet parallel to the ac plane. Weak slipped π–π stacking involving the naphthyridine ring systems stabilizes the structure.
Related literature
For related literature, see: Bayer (1979); Che et al. (2001); Gavrilova & Bosnich (2004); Jin et al. (2007); Kukrek et al. (2006); Mintert & Sheldrick (1995a,b); Oskui & Sheldrick (1999); Oskui, Mintert & Sheldrick (1999).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1999); cell SAINT (Bruker, 1999); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEPIII (Burnett & Johnson, 1996), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S160053680706271X/dn2283sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053680706271X/dn2283Isup2.hkl
All reagents and solvents were used as obtained without further purification. The CHN elemental analyses were performed on a Perkin-Elmer model 2400 elemental analyzer. A solution of cadmium nitrate tetrahydrate (31.4 mg, 0.1 mmol) in methanol (3 ml) was added to L (52.2 mg, 0.3 mmol) in methanol (10 ml) to give a colorless solution. The methanol solution was filtered. The solution was left standing at room temperature for several days, colorless block crystals were isolated. Yield: 41 mg, 70.3%. Anal. Calcd. for C20H22CdN8O6: C, 41.18; H, 3.77; N, 19.22. Found: C, 41.14; H, 3.72; N, 19.18.
All H atoms attached to C atoms and N atom were fixed geometrically and treated as riding with C—H = 0.93 Å (aromatic) or 0.96 Å (methyl) and N—H = 0.86 Å with Uiso(H) = 1.2Ueq(Caromatic or N) or Uiso(H) = 1.5Ueq(Cmethyl).
Molecular structures and chemical properties of transition metal complexes of 1,8-naphthyridine (napy) and its derivatives have received much attention(Kukrek et al., 2006; Che et al., 2001), because the ligands can link to metals with several coordination modes such as monodentate, chelating bidentate, and dinuclear bridging binding fashion (Gavrilova & Bosnich, 2004). 5,7-dimethyl-1,8-naphthyridin-2-amine (L) is a potentially tridentate ligand and is capable of linking two to four metal atoms together to form metal aggregates (Oskui et al., 1999; Mintert & Sheldrick, 1995a; Oskui & Sheldrick, 1999; Mintert & Sheldrick, 1995b). The coordination chemistry of 5,7-dimethyl-1,8-naphthyridine-2-amine has not been well studied before although a series of transiton metal complex (M(L)2Cl2) were once described in a US patent (Bayer, 1979). As an extension of our study on naphthyridine coordination chemistry(Jin et al., 2007), herein the title complex [Cd(L)2(NO3)2] is reported.
In the title compound, two naphthyridine are coordinated to the Cd ion through two nitrogen atoms in bidentate chelating mode whereas the remaining coordination sites are occupied by two oxygen atoms from two different nitrates (Fig. 1). The two nitrate ligands display a dissymetric chelating mode with Cd—O distances of 2.357 (4) and 2.718 (4). The remaining distances are within the usual range. The two naphthyridine rings were almost perpendicular to each other making dihedral angle of 80.22 (7)°. The two chelating Cd—O—N—O group make dihedral angle of 81.21 (12)°.
Intermoleular N—H···O hydrogen bonds link the molecules to form a one dimensionnal sheet parallel to the a axis (Table 1, Fig. 2). Weak slippest π-π stackings involving the naphthyridine rings stabilize the structure (Table 2).
For related literature, see: Bayer (1979); Che et al. (2001); Gavrilova & Bosnich (2004); Jin et al. (2007); Kukrek et al. (2006); Mintert & Sheldrick (1995a,b); Oskui & Sheldrick (1999); Oskui, Mintert & Sheldrick (1999).
Data collection: SMART (Bruker, 1999); cell
SAINT (Bruker, 1999); data reduction: SAINT (Bruker, 1999); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEPIII (Burnett & Johnson, 1996), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).Fig. 1. Molecular view of the title compound, showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. H atoms have been omitted for clarity. | |
Fig. 2. Partial packing view showing the N—H···O hydrogen bonds. Hydrogen bonds are shown as dashed lines. H atoms not involved in hydrogen bondings have been omitted for clarity. |
[Cd(NO3)2(C10H11N3)2] | Z = 2 |
Mr = 582.86 | F(000) = 588 |
Triclinic, P1 | Dx = 1.641 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.308 (2) Å | Cell parameters from 2793 reflections |
b = 9.584 (2) Å | θ = 2.4–26.1° |
c = 15.067 (4) Å | µ = 0.98 mm−1 |
α = 95.497 (3)° | T = 298 K |
β = 95.224 (3)° | Block, colorless |
γ = 116.865 (3)° | 0.45 × 0.37 × 0.31 mm |
V = 1179.8 (5) Å3 |
Bruker SMART diffractometer | 4101 independent reflections |
Radiation source: fine-focus sealed tube | 3346 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.019 |
φ and ω scans | θmax = 25.0°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −11→6 |
Tmin = 0.667, Tmax = 0.751 | k = −11→11 |
6136 measured reflections | l = −17→17 |
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)] = 0.035 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.081 | H-atom parameters constrained |
S = 1.09 | w = 1/[σ2(Fo2) + (0.037P)2 + 0.1524P] where P = (Fo2 + 2Fc2)/3 |
4101 reflections | (Δ/σ)max = 0.004 |
320 parameters | Δρmax = 0.67 e Å−3 |
0 restraints | Δρmin = −0.36 e Å−3 |
[Cd(NO3)2(C10H11N3)2] | γ = 116.865 (3)° |
Mr = 582.86 | V = 1179.8 (5) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.308 (2) Å | Mo Kα radiation |
b = 9.584 (2) Å | µ = 0.98 mm−1 |
c = 15.067 (4) Å | T = 298 K |
α = 95.497 (3)° | 0.45 × 0.37 × 0.31 mm |
β = 95.224 (3)° |
Bruker SMART diffractometer | 4101 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 3346 reflections with I > 2σ(I) |
Tmin = 0.667, Tmax = 0.751 | Rint = 0.019 |
6136 measured reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.081 | H-atom parameters constrained |
S = 1.09 | Δρmax = 0.67 e Å−3 |
4101 reflections | Δρmin = −0.36 e Å−3 |
320 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 | ||
Cd1 | 0.32533 (3) | 0.63678 (3) | 0.248895 (17) | 0.04168 (11) | |
N1 | 0.3847 (3) | 0.7270 (3) | 0.41178 (18) | 0.0381 (7) | |
N2 | 0.5294 (3) | 0.6210 (3) | 0.34613 (18) | 0.0385 (7) | |
N3 | 0.6662 (4) | 0.5103 (4) | 0.2720 (2) | 0.0624 (10) | |
H3A | 0.6026 | 0.4943 | 0.2228 | 0.075* | |
H3B | 0.7418 | 0.4820 | 0.2719 | 0.075* | |
N4 | 0.5509 (4) | 0.8962 (4) | 0.2110 (2) | 0.0448 (7) | |
N5 | 0.2822 (4) | 0.8123 (3) | 0.17237 (18) | 0.0407 (7) | |
N6 | 0.0057 (4) | 0.7107 (4) | 0.1316 (2) | 0.0616 (9) | |
H6A | −0.0097 | 0.6348 | 0.1619 | 0.074* | |
H6B | −0.0763 | 0.7152 | 0.1034 | 0.074* | |
N7 | 0.2627 (5) | 0.4197 (4) | 0.0808 (2) | 0.0568 (9) | |
N8 | 0.0220 (4) | 0.4282 (4) | 0.3115 (2) | 0.0459 (8) | |
O1 | 0.1458 (4) | 0.4451 (4) | 0.0924 (2) | 0.0826 (10) | |
O2 | 0.3852 (4) | 0.4845 (4) | 0.1406 (2) | 0.0784 (10) | |
O3 | 0.2607 (4) | 0.3373 (4) | 0.0126 (2) | 0.0803 (10) | |
O4 | 0.1344 (3) | 0.3951 (3) | 0.29808 (18) | 0.0550 (7) | |
O5 | 0.0207 (4) | 0.5429 (4) | 0.27969 (18) | 0.0622 (8) | |
O6 | −0.0832 (5) | 0.3513 (4) | 0.3543 (2) | 0.0927 (11) | |
C1 | 0.5092 (4) | 0.6900 (4) | 0.4236 (2) | 0.0342 (8) | |
C2 | 0.6476 (4) | 0.5792 (4) | 0.3489 (2) | 0.0395 (8) | |
C3 | 0.7515 (4) | 0.6041 (4) | 0.4305 (2) | 0.0447 (9) | |
H3 | 0.8323 | 0.5722 | 0.4311 | 0.054* | |
C4 | 0.7316 (4) | 0.6744 (4) | 0.5071 (2) | 0.0427 (9) | |
H4 | 0.8013 | 0.6939 | 0.5603 | 0.051* | |
C5 | 0.6056 (4) | 0.7189 (4) | 0.5074 (2) | 0.0361 (8) | |
C6 | 0.5702 (4) | 0.7900 (4) | 0.5826 (2) | 0.0403 (8) | |
C7 | 0.4400 (5) | 0.8216 (4) | 0.5692 (2) | 0.0449 (9) | |
H7 | 0.4116 | 0.8652 | 0.6181 | 0.054* | |
C8 | 0.3495 (4) | 0.7898 (4) | 0.4836 (2) | 0.0386 (8) | |
C9 | 0.6701 (5) | 0.8290 (5) | 0.6740 (2) | 0.0586 (11) | |
H9A | 0.6225 | 0.8677 | 0.7177 | 0.088* | |
H9B | 0.7791 | 0.9088 | 0.6724 | 0.088* | |
H9C | 0.6725 | 0.7356 | 0.6902 | 0.088* | |
C10 | 0.2099 (5) | 0.8259 (5) | 0.4700 (3) | 0.0533 (10) | |
H10A | 0.1851 | 0.8294 | 0.4073 | 0.080* | |
H10B | 0.2383 | 0.9266 | 0.5047 | 0.080* | |
H10C | 0.1165 | 0.7451 | 0.4893 | 0.080* | |
C11 | 0.4365 (5) | 0.9236 (4) | 0.1670 (2) | 0.0406 (8) | |
C12 | 0.1564 (5) | 0.8210 (5) | 0.1283 (2) | 0.0470 (9) | |
C13 | 0.1818 (6) | 0.9478 (5) | 0.0788 (3) | 0.0560 (11) | |
H13 | 0.0928 | 0.9539 | 0.0496 | 0.067* | |
C14 | 0.3334 (6) | 1.0585 (5) | 0.0741 (3) | 0.0571 (11) | |
H14 | 0.3489 | 1.1410 | 0.0419 | 0.069* | |
C15 | 0.4704 (5) | 1.0502 (4) | 0.1182 (2) | 0.0466 (9) | |
C16 | 0.6348 (6) | 1.1545 (5) | 0.1155 (3) | 0.0545 (11) | |
C17 | 0.7501 (6) | 1.1242 (5) | 0.1602 (3) | 0.0623 (12) | |
H17 | 0.8598 | 1.1908 | 0.1592 | 0.075* | |
C18 | 0.7068 (5) | 0.9956 (5) | 0.2072 (3) | 0.0554 (10) | |
C19 | 0.6828 (6) | 1.2936 (5) | 0.0644 (3) | 0.0732 (14) | |
H19A | 0.7992 | 1.3479 | 0.0680 | 0.110* | |
H19B | 0.6461 | 1.3648 | 0.0904 | 0.110* | |
H19C | 0.6336 | 1.2561 | 0.0023 | 0.110* | |
C20 | 0.8329 (5) | 0.9635 (6) | 0.2569 (4) | 0.0837 (15) | |
H20A | 0.8194 | 0.9630 | 0.3193 | 0.126* | |
H20B | 0.9396 | 1.0446 | 0.2521 | 0.126* | |
H20C | 0.8206 | 0.8624 | 0.2313 | 0.126* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cd1 | 0.03665 (17) | 0.05040 (19) | 0.03889 (17) | 0.02133 (13) | −0.00124 (11) | 0.01172 (12) |
N1 | 0.0334 (16) | 0.0441 (18) | 0.0397 (17) | 0.0198 (15) | 0.0055 (13) | 0.0101 (14) |
N2 | 0.0343 (16) | 0.0515 (19) | 0.0318 (16) | 0.0219 (15) | 0.0033 (13) | 0.0070 (13) |
N3 | 0.056 (2) | 0.103 (3) | 0.0426 (19) | 0.053 (2) | 0.0011 (16) | −0.0061 (19) |
N4 | 0.0439 (19) | 0.0461 (19) | 0.0428 (18) | 0.0198 (17) | 0.0060 (15) | 0.0060 (14) |
N5 | 0.0465 (19) | 0.0442 (18) | 0.0313 (16) | 0.0218 (16) | 0.0004 (14) | 0.0064 (13) |
N6 | 0.047 (2) | 0.072 (3) | 0.064 (2) | 0.026 (2) | −0.0057 (17) | 0.0254 (19) |
N7 | 0.076 (3) | 0.057 (2) | 0.041 (2) | 0.037 (2) | −0.0073 (19) | 0.0058 (17) |
N8 | 0.0391 (18) | 0.054 (2) | 0.0418 (18) | 0.0183 (17) | 0.0073 (15) | 0.0091 (16) |
O1 | 0.083 (2) | 0.101 (3) | 0.081 (2) | 0.061 (2) | 0.0066 (19) | 0.0053 (19) |
O2 | 0.073 (2) | 0.100 (3) | 0.0541 (19) | 0.044 (2) | −0.0205 (16) | −0.0151 (17) |
O3 | 0.111 (3) | 0.096 (3) | 0.0524 (19) | 0.077 (2) | −0.0252 (18) | −0.0190 (17) |
O4 | 0.0460 (16) | 0.0676 (19) | 0.0608 (18) | 0.0351 (15) | 0.0044 (13) | 0.0099 (14) |
O5 | 0.072 (2) | 0.071 (2) | 0.0607 (18) | 0.0446 (18) | 0.0102 (15) | 0.0249 (16) |
O6 | 0.089 (3) | 0.092 (3) | 0.100 (3) | 0.032 (2) | 0.060 (2) | 0.037 (2) |
C1 | 0.0311 (18) | 0.0372 (19) | 0.0331 (19) | 0.0152 (16) | 0.0029 (15) | 0.0069 (15) |
C2 | 0.033 (2) | 0.048 (2) | 0.039 (2) | 0.0206 (18) | 0.0045 (16) | 0.0052 (17) |
C3 | 0.034 (2) | 0.055 (2) | 0.049 (2) | 0.0253 (19) | −0.0001 (17) | 0.0072 (19) |
C4 | 0.035 (2) | 0.050 (2) | 0.039 (2) | 0.0176 (18) | −0.0038 (16) | 0.0045 (17) |
C5 | 0.0343 (19) | 0.0355 (19) | 0.0347 (19) | 0.0139 (17) | 0.0013 (15) | 0.0042 (15) |
C6 | 0.041 (2) | 0.039 (2) | 0.037 (2) | 0.0156 (18) | 0.0013 (16) | 0.0029 (16) |
C7 | 0.048 (2) | 0.042 (2) | 0.043 (2) | 0.0206 (19) | 0.0096 (18) | 0.0027 (17) |
C8 | 0.0327 (19) | 0.034 (2) | 0.048 (2) | 0.0130 (16) | 0.0113 (17) | 0.0103 (17) |
C9 | 0.062 (3) | 0.076 (3) | 0.037 (2) | 0.036 (2) | −0.0058 (19) | −0.006 (2) |
C10 | 0.046 (2) | 0.059 (3) | 0.067 (3) | 0.032 (2) | 0.014 (2) | 0.014 (2) |
C11 | 0.050 (2) | 0.037 (2) | 0.0300 (19) | 0.0172 (19) | 0.0063 (17) | −0.0007 (15) |
C12 | 0.057 (3) | 0.052 (2) | 0.035 (2) | 0.029 (2) | 0.0013 (18) | 0.0076 (18) |
C13 | 0.069 (3) | 0.062 (3) | 0.046 (2) | 0.038 (3) | 0.003 (2) | 0.015 (2) |
C14 | 0.090 (4) | 0.051 (3) | 0.041 (2) | 0.040 (3) | 0.013 (2) | 0.0157 (19) |
C15 | 0.067 (3) | 0.038 (2) | 0.034 (2) | 0.023 (2) | 0.0129 (19) | 0.0019 (17) |
C16 | 0.075 (3) | 0.040 (2) | 0.036 (2) | 0.016 (2) | 0.014 (2) | −0.0011 (18) |
C17 | 0.059 (3) | 0.053 (3) | 0.060 (3) | 0.013 (2) | 0.018 (2) | 0.002 (2) |
C18 | 0.044 (2) | 0.056 (3) | 0.059 (3) | 0.019 (2) | 0.007 (2) | 0.000 (2) |
C19 | 0.097 (4) | 0.043 (3) | 0.057 (3) | 0.011 (3) | 0.028 (3) | 0.009 (2) |
C20 | 0.047 (3) | 0.082 (4) | 0.118 (4) | 0.027 (3) | 0.008 (3) | 0.020 (3) |
Cd1—N5 | 2.284 (3) | C4—H4 | 0.9300 |
Cd1—O2 | 2.355 (3) | C5—C6 | 1.408 (5) |
Cd1—N2 | 2.361 (3) | C6—C7 | 1.379 (5) |
Cd1—O4 | 2.433 (3) | C6—C9 | 1.501 (5) |
Cd1—N1 | 2.448 (3) | C7—C8 | 1.400 (5) |
Cd1—N4 | 2.586 (3) | C7—H7 | 0.9300 |
N1—C8 | 1.326 (4) | C8—C10 | 1.490 (5) |
N1—C1 | 1.359 (4) | C9—H9A | 0.9600 |
N2—C2 | 1.328 (4) | C9—H9B | 0.9600 |
N2—C1 | 1.356 (4) | C9—H9C | 0.9600 |
N3—C2 | 1.343 (4) | C10—H10A | 0.9600 |
N3—H3A | 0.8600 | C10—H10B | 0.9600 |
N3—H3B | 0.8600 | C10—H10C | 0.9600 |
N4—C18 | 1.339 (5) | C11—C15 | 1.406 (5) |
N4—C11 | 1.342 (5) | C12—C13 | 1.427 (5) |
N5—C12 | 1.333 (4) | C13—C14 | 1.342 (6) |
N5—C11 | 1.364 (5) | C13—H13 | 0.9300 |
N6—C12 | 1.330 (5) | C14—C15 | 1.422 (6) |
N6—H6A | 0.8600 | C14—H14 | 0.9300 |
N6—H6B | 0.8600 | C15—C16 | 1.406 (6) |
N7—O3 | 1.229 (4) | C16—C17 | 1.370 (6) |
N7—O1 | 1.241 (4) | C16—C19 | 1.514 (5) |
N7—O2 | 1.250 (4) | C17—C18 | 1.398 (6) |
N8—O6 | 1.213 (4) | C17—H17 | 0.9300 |
N8—O5 | 1.246 (4) | C18—C20 | 1.498 (6) |
N8—O4 | 1.250 (4) | C19—H19A | 0.9600 |
C1—C5 | 1.405 (4) | C19—H19B | 0.9600 |
C2—C3 | 1.423 (5) | C19—H19C | 0.9600 |
C3—C4 | 1.351 (5) | C20—H20A | 0.9600 |
C3—H3 | 0.9300 | C20—H20B | 0.9600 |
C4—C5 | 1.418 (5) | C20—H20C | 0.9600 |
N5—Cd1—O2 | 104.91 (11) | C7—C6—C9 | 121.4 (3) |
N5—Cd1—N2 | 140.76 (11) | C5—C6—C9 | 121.2 (3) |
O2—Cd1—N2 | 84.14 (10) | C6—C7—C8 | 121.6 (3) |
N5—Cd1—O4 | 130.94 (10) | C6—C7—H7 | 119.2 |
O2—Cd1—O4 | 89.68 (11) | C8—C7—H7 | 119.2 |
N2—Cd1—O4 | 86.30 (9) | N1—C8—C7 | 121.4 (3) |
N5—Cd1—N1 | 111.10 (9) | N1—C8—C10 | 117.6 (3) |
O2—Cd1—N1 | 139.39 (10) | C7—C8—C10 | 121.0 (3) |
N2—Cd1—N1 | 56.05 (9) | C6—C9—H9A | 109.5 |
O4—Cd1—N1 | 80.82 (9) | C6—C9—H9B | 109.5 |
N5—Cd1—N4 | 54.63 (10) | H9A—C9—H9B | 109.5 |
O2—Cd1—N4 | 91.13 (11) | C6—C9—H9C | 109.5 |
N2—Cd1—N4 | 87.67 (10) | H9A—C9—H9C | 109.5 |
O4—Cd1—N4 | 173.80 (9) | H9B—C9—H9C | 109.5 |
N1—Cd1—N4 | 94.61 (9) | C8—C10—H10A | 109.5 |
C8—N1—C1 | 118.2 (3) | C8—C10—H10B | 109.5 |
C8—N1—Cd1 | 148.2 (2) | H10A—C10—H10B | 109.5 |
C1—N1—Cd1 | 93.59 (19) | C8—C10—H10C | 109.5 |
C2—N2—C1 | 118.5 (3) | H10A—C10—H10C | 109.5 |
C2—N2—Cd1 | 143.8 (2) | H10B—C10—H10C | 109.5 |
C1—N2—Cd1 | 97.6 (2) | N4—C11—N5 | 112.6 (3) |
C2—N3—H3A | 120.0 | N4—C11—C15 | 124.2 (4) |
C2—N3—H3B | 120.0 | N5—C11—C15 | 123.2 (3) |
H3A—N3—H3B | 120.0 | N6—C12—N5 | 119.3 (3) |
C18—N4—C11 | 117.4 (3) | N6—C12—C13 | 120.0 (4) |
C18—N4—Cd1 | 152.3 (3) | N5—C12—C13 | 120.7 (4) |
C11—N4—Cd1 | 89.8 (2) | C14—C13—C12 | 120.4 (4) |
C12—N5—C11 | 119.0 (3) | C14—C13—H13 | 119.8 |
C12—N5—Cd1 | 137.6 (3) | C12—C13—H13 | 119.8 |
C11—N5—Cd1 | 102.9 (2) | C13—C14—C15 | 120.3 (4) |
C12—N6—H6A | 120.0 | C13—C14—H14 | 119.8 |
C12—N6—H6B | 120.0 | C15—C14—H14 | 119.8 |
H6A—N6—H6B | 120.0 | C11—C15—C16 | 117.8 (4) |
O3—N7—O1 | 121.8 (4) | C11—C15—C14 | 116.3 (4) |
O3—N7—O2 | 120.9 (4) | C16—C15—C14 | 125.9 (4) |
O1—N7—O2 | 117.3 (3) | C17—C16—C15 | 117.4 (4) |
O6—N8—O5 | 120.6 (3) | C17—C16—C19 | 121.2 (4) |
O6—N8—O4 | 121.3 (4) | C15—C16—C19 | 121.5 (4) |
O5—N8—O4 | 118.1 (3) | C16—C17—C18 | 121.5 (4) |
N7—O2—Cd1 | 105.8 (3) | C16—C17—H17 | 119.2 |
N8—O4—Cd1 | 100.6 (2) | C18—C17—H17 | 119.2 |
N2—C1—N1 | 112.7 (3) | N4—C18—C17 | 121.8 (4) |
N2—C1—C5 | 123.7 (3) | N4—C18—C20 | 116.7 (4) |
N1—C1—C5 | 123.5 (3) | C17—C18—C20 | 121.6 (4) |
N2—C2—N3 | 118.1 (3) | C16—C19—H19A | 109.5 |
N2—C2—C3 | 121.8 (3) | C16—C19—H19B | 109.5 |
N3—C2—C3 | 120.1 (3) | H19A—C19—H19B | 109.5 |
C4—C3—C2 | 119.3 (3) | C16—C19—H19C | 109.5 |
C4—C3—H3 | 120.4 | H19A—C19—H19C | 109.5 |
C2—C3—H3 | 120.4 | H19B—C19—H19C | 109.5 |
C3—C4—C5 | 120.7 (3) | C18—C20—H20A | 109.5 |
C3—C4—H4 | 119.7 | C18—C20—H20B | 109.5 |
C5—C4—H4 | 119.7 | H20A—C20—H20B | 109.5 |
C1—C5—C6 | 117.8 (3) | C18—C20—H20C | 109.5 |
C1—C5—C4 | 116.0 (3) | H20A—C20—H20C | 109.5 |
C6—C5—C4 | 126.2 (3) | H20B—C20—H20C | 109.5 |
C7—C6—C5 | 117.4 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3A···O2 | 0.86 | 2.23 | 3.033 (4) | 155 |
N3—H3B···O5i | 0.86 | 2.38 | 3.161 (4) | 151 |
N6—H6A···O5 | 0.86 | 2.11 | 2.902 (4) | 153 |
N6—H6B···O3ii | 0.86 | 2.18 | 2.979 (4) | 154 |
Symmetry codes: (i) x+1, y, z; (ii) −x, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | [Cd(NO3)2(C10H11N3)2] |
Mr | 582.86 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 9.308 (2), 9.584 (2), 15.067 (4) |
α, β, γ (°) | 95.497 (3), 95.224 (3), 116.865 (3) |
V (Å3) | 1179.8 (5) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.98 |
Crystal size (mm) | 0.45 × 0.37 × 0.31 |
Data collection | |
Diffractometer | Bruker SMART |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.667, 0.751 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6136, 4101, 3346 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.081, 1.09 |
No. of reflections | 4101 |
No. of parameters | 320 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.67, −0.36 |
Computer programs: SMART (Bruker, 1999), SAINT (Bruker, 1999), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), ORTEPIII (Burnett & Johnson, 1996), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2003).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3A···O2 | 0.86 | 2.23 | 3.033 (4) | 154.7 |
N3—H3B···O5i | 0.86 | 2.38 | 3.161 (4) | 151.4 |
N6—H6A···O5 | 0.86 | 2.11 | 2.902 (4) | 153.4 |
N6—H6B···O3ii | 0.86 | 2.18 | 2.979 (4) | 154.3 |
Symmetry codes: (i) x+1, y, z; (ii) −x, −y+1, −z. |
α is the dihedral angle between the planes, DCC is the length of the CC vector (centroid to centroid),
τ is the angle(s) subtended by the plane normal(s) to CC (offset angle).
Cg1 is the centroid of ring N1/C1/C5–C8,
Cg2 is the centroid of ring N2/C1/C5–C2.
Symmetry code: (iii) -x+1, -y+1, -z+1. top
Centroid 1 | Centroid 2 | α | DCC | τ |
Cg1 | Cg2iii | 1.32 | 3.862 (2) | 26.0 |
Cg2 | Cg2iii | 0.0 | 3.823 (2) | 24.5 |
Acknowledgements
The authors thank the Zhejiang Forestry University Science Foundation for financial support.
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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.
Molecular structures and chemical properties of transition metal complexes of 1,8-naphthyridine (napy) and its derivatives have received much attention(Kukrek et al., 2006; Che et al., 2001), because the ligands can link to metals with several coordination modes such as monodentate, chelating bidentate, and dinuclear bridging binding fashion (Gavrilova & Bosnich, 2004). 5,7-dimethyl-1,8-naphthyridin-2-amine (L) is a potentially tridentate ligand and is capable of linking two to four metal atoms together to form metal aggregates (Oskui et al., 1999; Mintert & Sheldrick, 1995a; Oskui & Sheldrick, 1999; Mintert & Sheldrick, 1995b). The coordination chemistry of 5,7-dimethyl-1,8-naphthyridine-2-amine has not been well studied before although a series of transiton metal complex (M(L)2Cl2) were once described in a US patent (Bayer, 1979). As an extension of our study on naphthyridine coordination chemistry(Jin et al., 2007), herein the title complex [Cd(L)2(NO3)2] is reported.
In the title compound, two naphthyridine are coordinated to the Cd ion through two nitrogen atoms in bidentate chelating mode whereas the remaining coordination sites are occupied by two oxygen atoms from two different nitrates (Fig. 1). The two nitrate ligands display a dissymetric chelating mode with Cd—O distances of 2.357 (4) and 2.718 (4). The remaining distances are within the usual range. The two naphthyridine rings were almost perpendicular to each other making dihedral angle of 80.22 (7)°. The two chelating Cd—O—N—O group make dihedral angle of 81.21 (12)°.
Intermoleular N—H···O hydrogen bonds link the molecules to form a one dimensionnal sheet parallel to the a axis (Table 1, Fig. 2). Weak slippest π-π stackings involving the naphthyridine rings stabilize the structure (Table 2).