metal-organic compounds
Bis[μ-N-(pyridin-2-ylmethyl)pyridin-2-amine-κ2N:N′]disilver(I) bis(trifluoromethanesulfonate)
aDepartment of Food & Nutrition, Kyungnam College of Information and Technology, Busan 617-701, Republic of Korea, and bDepartment of Chemistry and Research Institute of Natural Sciences, Gyeongsang, National University, Jinju 660-701, Republic of Korea
*Correspondence e-mail: thkim@gnu.ac.kr, kmpark@gnu.ac.kr
In the binuclear title compound, [Ag2(C11H11N3)2](CF3O3S)2, the complex cation is centrosymmetric, with the unique Ag+ cation coordinated by two pyridine N atoms from two symmetry-related N-(pyridin-2-ylmethyl)pyridin-2-amine ligands in a geometry slightly distorted from linear [N—Ag—N 161.02 (7)°]. This set-up leads to the formation of a 14-membered cyclic dimer. The two pyridine rings coordinated to the Ag+ cation are tilted by 80.19 (7)° with respect to each other. Intermolecular N—H⋯O hydrogen-bonding interactions between the cyclic dimer and the anion exist. A two-dimensional network parallel to the ac plane is constructed by three weak Ag⋯(O,N) interactions as well as an F⋯F contact of 2.890 (4) Å.
Related literature
For the synthesis of the ligand, see: Foxon et al. (2002). For the of the free ligand, see: Moon et al. (2011). For the structures of related copper complexes, see: Lee et al. (2008).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2006); cell SAINT (Bruker, 2006); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536811047908/wm2556sup1.cif
contains datablocks I, New_Global_Publ_Block. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811047908/wm2556Isup2.hkl
The ligand (N-(pyridine-2-ylmethyl)pyridine-2-amine) was synthesized according to a procedure described by Foxon et al. (2002). Crystals of the title compound suitable for X-ray analysis were obtained by vapor diffusion of diethyl ether into a DMSO solution of the white precipitate afforded by the reaction of the ligand with silver(I) trifluoromethanesulfonate in the molar ratio 1:1 in methanol.
All H atoms were positioned geometrically and refined using a riding model, with d(C–H) = 0.95 Å for Csp2–H, 0.88 Å for amine N–H and 0.99 Å for methylene C–H. For all H atoms Uiso(H) = 1.2Ueq(C,N).
The dipyridyl ligand N-(pyridin-2-ylmethyl)pyridin-2-amine has been synthesized by the reaction of 2-aminopyridine and 2-pyridinecarboxaldehyde according to literature (Foxon et al., 2002) and its
was already reported by our group (Moon et al., 2011). In the reaction of the ligand and CuX (X = I and Br), two-dimensional brick-wall type coordination polymers, in which rhomboid Cu2X2 nodes interconnect the dipyridyl ligands, were obtained (Lee et al., 2008). Herein, we report the of the title compound prepared by the reaction of silver trifluoromethanesulfonate with the dipyridyl ligand.The binuclear cation of the title compound, [Ag2(C11H11N3)2](CF3SO3)2, is located on an inversion centre. The
of the compound therefore consists of a Ag+ cation, an N-(pyridin-2-ylmethyl)pyridin-2-amine ligand and a trifluoromethanesulfonate anion. The two Ag+ cations, each in a geometry slightly distorted from linear (N–Ag–N 161.02 (7)°), are coordinated by two pyridine N atoms from two symmetry-related N-(pyridine-2-ylmethyl)pyridine-2-amine ligands, leading to the formation of a centrosymmetric 14-membered cyclic dimer (Fig. 1). Two pyridine rings coordinated to the Ag+ cations are tilted by 80.19 (7)° with respect to each other.The non-coordinated CF3SO3- anions participate in N—H···O hydrogen-bonding (Table 1, Fig. 1) and weak Ag···O interactions, as well as an F···F contact of 2.890 (4) Å. Together with another weak Ag—N contact, this leads to the construction of a two-dimensional network extending parallel to the ac plane (Fig. 2).
For the synthesis of the ligand, see: Foxon et al. (2002). For the
of the free ligand, see: Moon et al. (2011). For the structures of related copper complexes, see: Lee et al. (2008).Data collection: APEX2 (Bruker, 2006); cell
SAINT (Bruker, 2006); data reduction: SAINT (Bruker, 2006); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).[Ag2(C11H11N3)2](CF3O3S)2 | Z = 1 |
Mr = 884.34 | F(000) = 436 |
Triclinic, P1 | Dx = 2.024 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.4105 (5) Å | Cell parameters from 3938 reflections |
b = 9.3500 (6) Å | θ = 2.7–28.3° |
c = 11.1693 (7) Å | µ = 1.58 mm−1 |
α = 108.489 (1)° | T = 173 K |
β = 92.826 (1)° | Block, colorless |
γ = 116.606 (1)° | 0.35 × 0.35 × 0.25 mm |
V = 725.58 (8) Å3 |
Bruker APEXII CCD diffractometer | 2791 independent reflections |
Radiation source: fine-focus sealed tube | 2665 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.012 |
φ and ω scans | θmax = 26.0°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −9→10 |
Tmin = 0.607, Tmax = 0.693 | k = −11→8 |
4132 measured reflections | l = −11→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)] = 0.022 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.058 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0304P)2 + 0.5885P] where P = (Fo2 + 2Fc2)/3 |
2791 reflections | (Δ/σ)max = 0.001 |
208 parameters | Δρmax = 0.52 e Å−3 |
0 restraints | Δρmin = −0.58 e Å−3 |
[Ag2(C11H11N3)2](CF3O3S)2 | γ = 116.606 (1)° |
Mr = 884.34 | V = 725.58 (8) Å3 |
Triclinic, P1 | Z = 1 |
a = 8.4105 (5) Å | Mo Kα radiation |
b = 9.3500 (6) Å | µ = 1.58 mm−1 |
c = 11.1693 (7) Å | T = 173 K |
α = 108.489 (1)° | 0.35 × 0.35 × 0.25 mm |
β = 92.826 (1)° |
Bruker APEXII CCD diffractometer | 2791 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2665 reflections with I > 2σ(I) |
Tmin = 0.607, Tmax = 0.693 | Rint = 0.012 |
4132 measured reflections |
R[F2 > 2σ(F2)] = 0.022 | 0 restraints |
wR(F2) = 0.058 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.52 e Å−3 |
2791 reflections | Δρmin = −0.58 e Å−3 |
208 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 | ||
Ag1 | 0.73116 (2) | 0.42494 (2) | 0.529910 (17) | 0.02835 (8) | |
S1 | 0.71713 (7) | 0.57867 (7) | 0.27669 (5) | 0.02346 (13) | |
F1 | 0.7558 (2) | 0.4025 (2) | 0.05757 (16) | 0.0470 (4) | |
F2 | 0.4881 (2) | 0.3730 (2) | 0.05173 (16) | 0.0458 (4) | |
F3 | 0.5706 (3) | 0.2439 (2) | 0.14581 (17) | 0.0472 (4) | |
O1 | 0.5669 (3) | 0.5441 (3) | 0.33935 (19) | 0.0453 (5) | |
O2 | 0.8665 (3) | 0.5741 (3) | 0.34139 (18) | 0.0401 (4) | |
O3 | 0.7701 (3) | 0.7179 (2) | 0.2327 (2) | 0.0432 (5) | |
N1 | 0.5191 (2) | 0.1705 (2) | 0.40024 (18) | 0.0208 (4) | |
N2 | 1.0963 (2) | 0.3571 (2) | 0.29514 (18) | 0.0214 (4) | |
N3 | 0.8870 (2) | 0.2190 (2) | 0.40206 (18) | 0.0233 (4) | |
H3N | 0.9469 | 0.3125 | 0.4732 | 0.028* | |
C1 | 0.3513 (3) | 0.1454 (3) | 0.3606 (2) | 0.0246 (5) | |
H1 | 0.3303 | 0.2413 | 0.3882 | 0.030* | |
C2 | 0.2088 (3) | −0.0146 (3) | 0.2816 (2) | 0.0276 (5) | |
H2 | 0.0916 | −0.0288 | 0.2561 | 0.033* | |
C3 | 0.2397 (3) | −0.1544 (3) | 0.2398 (2) | 0.0290 (5) | |
H3 | 0.1438 | −0.2661 | 0.1859 | 0.035* | |
C4 | 0.4122 (3) | −0.1284 (3) | 0.2781 (2) | 0.0256 (5) | |
H4 | 0.4370 | −0.2219 | 0.2494 | 0.031* | |
C5 | 0.5496 (3) | 0.0359 (3) | 0.3591 (2) | 0.0201 (4) | |
C6 | 0.7364 (3) | 0.0649 (3) | 0.4082 (2) | 0.0230 (4) | |
H6A | 0.7481 | 0.0738 | 0.4992 | 0.028* | |
H6B | 0.7467 | −0.0372 | 0.3566 | 0.028* | |
C7 | 0.9368 (3) | 0.2208 (3) | 0.2875 (2) | 0.0195 (4) | |
C8 | 0.8283 (3) | 0.0890 (3) | 0.1673 (2) | 0.0236 (5) | |
H8 | 0.7182 | −0.0083 | 0.1631 | 0.028* | |
C9 | 0.8834 (3) | 0.1027 (3) | 0.0562 (2) | 0.0264 (5) | |
H9 | 0.8101 | 0.0155 | −0.0257 | 0.032* | |
C10 | 1.0466 (3) | 0.2440 (3) | 0.0629 (2) | 0.0271 (5) | |
H10 | 1.0864 | 0.2556 | −0.0133 | 0.033* | |
C11 | 1.1477 (3) | 0.3658 (3) | 0.1834 (2) | 0.0259 (5) | |
H11 | 1.2601 | 0.4618 | 0.1889 | 0.031* | |
C12 | 0.6282 (3) | 0.3897 (3) | 0.1256 (2) | 0.0265 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ag1 | 0.02417 (11) | 0.01720 (10) | 0.02998 (12) | 0.00595 (8) | −0.00098 (7) | −0.00025 (7) |
S1 | 0.0221 (3) | 0.0213 (3) | 0.0212 (3) | 0.0091 (2) | 0.0029 (2) | 0.0037 (2) |
F1 | 0.0484 (10) | 0.0486 (10) | 0.0368 (9) | 0.0236 (9) | 0.0216 (8) | 0.0059 (8) |
F2 | 0.0425 (9) | 0.0494 (10) | 0.0325 (8) | 0.0217 (8) | −0.0096 (7) | 0.0038 (7) |
F3 | 0.0636 (11) | 0.0233 (8) | 0.0445 (10) | 0.0155 (8) | 0.0077 (8) | 0.0098 (7) |
O1 | 0.0343 (10) | 0.0484 (12) | 0.0359 (11) | 0.0150 (9) | 0.0156 (9) | 0.0019 (9) |
O2 | 0.0359 (10) | 0.0451 (11) | 0.0313 (10) | 0.0205 (9) | −0.0062 (8) | 0.0060 (9) |
O3 | 0.0574 (13) | 0.0234 (9) | 0.0423 (11) | 0.0160 (9) | 0.0063 (10) | 0.0111 (8) |
N1 | 0.0211 (9) | 0.0183 (9) | 0.0192 (9) | 0.0073 (7) | 0.0041 (7) | 0.0062 (7) |
N2 | 0.0179 (9) | 0.0175 (9) | 0.0250 (10) | 0.0079 (7) | 0.0044 (7) | 0.0048 (7) |
N3 | 0.0200 (9) | 0.0216 (9) | 0.0193 (9) | 0.0063 (8) | 0.0029 (7) | 0.0030 (7) |
C1 | 0.0248 (11) | 0.0261 (12) | 0.0235 (11) | 0.0126 (10) | 0.0051 (9) | 0.0098 (9) |
C2 | 0.0220 (11) | 0.0331 (13) | 0.0226 (11) | 0.0095 (10) | 0.0023 (9) | 0.0107 (10) |
C3 | 0.0258 (12) | 0.0233 (12) | 0.0222 (11) | 0.0031 (10) | 0.0018 (9) | 0.0036 (9) |
C4 | 0.0285 (12) | 0.0187 (11) | 0.0238 (11) | 0.0088 (9) | 0.0072 (9) | 0.0050 (9) |
C5 | 0.0232 (10) | 0.0191 (10) | 0.0173 (10) | 0.0084 (9) | 0.0070 (8) | 0.0090 (8) |
C6 | 0.0250 (11) | 0.0224 (11) | 0.0225 (11) | 0.0116 (9) | 0.0065 (9) | 0.0096 (9) |
C7 | 0.0173 (10) | 0.0188 (10) | 0.0218 (11) | 0.0102 (8) | 0.0039 (8) | 0.0051 (9) |
C8 | 0.0192 (10) | 0.0209 (11) | 0.0236 (11) | 0.0063 (9) | 0.0041 (9) | 0.0054 (9) |
C9 | 0.0250 (11) | 0.0274 (12) | 0.0201 (11) | 0.0109 (10) | 0.0021 (9) | 0.0043 (9) |
C10 | 0.0285 (12) | 0.0284 (12) | 0.0242 (11) | 0.0131 (10) | 0.0100 (9) | 0.0104 (10) |
C11 | 0.0232 (11) | 0.0239 (11) | 0.0304 (12) | 0.0112 (9) | 0.0094 (9) | 0.0101 (10) |
C12 | 0.0278 (11) | 0.0250 (12) | 0.0232 (11) | 0.0117 (10) | 0.0046 (9) | 0.0071 (9) |
Ag1—N2i | 2.1500 (19) | C1—C2 | 1.381 (3) |
Ag1—N1 | 2.1673 (19) | C1—H1 | 0.9500 |
Ag1—N3 | 2.8573 (19) | C2—C3 | 1.386 (4) |
Ag1—O2 | 2.890 (2) | C2—H2 | 0.9500 |
Ag1—C11i | 3.006 (2) | C3—C4 | 1.380 (3) |
Ag1—O1ii | 3.0402 (18) | C3—H3 | 0.9500 |
S1—O3 | 1.429 (2) | C4—C5 | 1.393 (3) |
S1—O1 | 1.4337 (19) | C4—H4 | 0.9500 |
S1—O2 | 1.4420 (19) | C5—C6 | 1.511 (3) |
S1—C12 | 1.825 (2) | C6—H6A | 0.9900 |
F1—C12 | 1.329 (3) | C6—H6B | 0.9900 |
F2—C12 | 1.323 (3) | C7—C8 | 1.406 (3) |
F3—C12 | 1.327 (3) | C7—Ag1i | 3.131 (2) |
O1—Ag1ii | 3.0402 (18) | C8—C9 | 1.369 (3) |
N1—C5 | 1.340 (3) | C8—H8 | 0.9500 |
N1—C1 | 1.348 (3) | C9—C10 | 1.392 (3) |
N2—C7 | 1.349 (3) | C9—H9 | 0.9500 |
N2—C11 | 1.355 (3) | C10—C11 | 1.371 (3) |
N2—Ag1i | 2.1500 (19) | C10—H10 | 0.9500 |
N3—C7 | 1.369 (3) | C11—Ag1i | 3.006 (2) |
N3—C6 | 1.456 (3) | C11—H11 | 0.9500 |
N3—H3N | 0.8800 | ||
N2i—Ag1—N1 | 161.02 (7) | C5—C4—H4 | 120.3 |
N2i—Ag1—N3 | 115.71 (6) | N1—C5—C4 | 121.6 (2) |
N1—Ag1—N3 | 69.45 (6) | N1—C5—C6 | 118.06 (19) |
N2i—Ag1—O2 | 99.53 (6) | C4—C5—C6 | 120.3 (2) |
N1—Ag1—O2 | 99.40 (6) | C4—C5—Ag1 | 158.27 (17) |
N3—Ag1—O2 | 79.27 (6) | C6—C5—Ag1 | 81.36 (12) |
N2i—Ag1—O1ii | 81.91 (6) | N3—C6—C5 | 114.20 (18) |
N1—Ag1—O1ii | 86.40 (6) | N3—C6—Ag1 | 62.26 (11) |
N3—Ag1—O1ii | 149.79 (6) | C5—C6—Ag1 | 71.08 (12) |
O2—Ag1—O1ii | 123.91 (6) | N3—C6—H6A | 108.7 |
C11i—Ag1—O1ii | 64.92 (6) | C5—C6—H6A | 108.7 |
O3—S1—O1 | 116.39 (14) | Ag1—C6—H6A | 83.1 |
O3—S1—O2 | 114.82 (13) | N3—C6—H6B | 108.7 |
O1—S1—O2 | 113.51 (13) | C5—C6—H6B | 108.7 |
O3—S1—C12 | 102.74 (12) | Ag1—C6—H6B | 168.3 |
O1—S1—C12 | 104.03 (12) | H6A—C6—H6B | 107.6 |
O2—S1—C12 | 102.98 (11) | N2—C7—N3 | 116.50 (19) |
S1—O1—Ag1ii | 162.63 (14) | N2—C7—C8 | 121.1 (2) |
S1—O2—Ag1 | 106.35 (10) | N3—C7—C8 | 122.42 (19) |
C5—N1—C1 | 118.76 (19) | N3—C7—Ag1i | 82.48 (12) |
C5—N1—Ag1 | 121.61 (15) | C8—C7—Ag1i | 155.01 (15) |
C1—N1—Ag1 | 119.63 (15) | C9—C8—C7 | 119.2 (2) |
C7—N2—C11 | 118.19 (19) | C9—C8—H8 | 120.4 |
C7—N2—Ag1i | 125.35 (15) | C7—C8—H8 | 120.4 |
C11—N2—Ag1i | 116.27 (15) | C8—C9—C10 | 120.2 (2) |
C7—N3—C6 | 121.04 (18) | C8—C9—H9 | 119.9 |
C7—N3—H3N | 119.5 | C10—C9—H9 | 119.9 |
C6—N3—H3N | 119.5 | C11—C10—C9 | 117.6 (2) |
N1—C1—C2 | 122.4 (2) | C11—C10—H10 | 121.2 |
C2—C1—Ag1 | 160.26 (18) | C9—C10—H10 | 121.2 |
N1—C1—H1 | 118.8 | N2—C11—C10 | 123.7 (2) |
C2—C1—H1 | 118.8 | C10—C11—Ag1i | 163.26 (17) |
Ag1—C1—H1 | 80.9 | N2—C11—H11 | 118.1 |
C1—C2—C3 | 118.9 (2) | C10—C11—H11 | 118.1 |
C1—C2—H2 | 120.5 | Ag1i—C11—H11 | 78.4 |
C3—C2—H2 | 120.5 | F2—C12—F3 | 106.8 (2) |
C4—C3—C2 | 118.8 (2) | F2—C12—F1 | 107.4 (2) |
C4—C3—H3 | 120.6 | F3—C12—F1 | 107.8 (2) |
C2—C3—H3 | 120.6 | F2—C12—S1 | 111.64 (17) |
C3—C4—C5 | 119.5 (2) | F3—C12—S1 | 112.18 (17) |
C3—C4—H4 | 120.3 | F1—C12—S1 | 110.72 (17) |
N2i—Ag1—N1—C5 | −89.5 (3) | Ag1i—N2—C7—C8 | 176.29 (16) |
N2i—Ag1—N1—C1 | 89.7 (3) | C6—N3—C7—N2 | −168.59 (19) |
C5—N1—C1—C2 | 1.4 (3) | C6—N3—C7—C8 | 11.8 (3) |
Ag1—N1—C1—C2 | −177.83 (17) | N2—C7—C8—C9 | −2.1 (3) |
N1—C1—C2—C3 | −0.8 (4) | N3—C7—C8—C9 | 177.5 (2) |
C1—C2—C3—C4 | −0.5 (4) | C7—C8—C9—C10 | 1.2 (4) |
C2—C3—C4—C5 | 1.2 (3) | C8—C9—C10—C11 | 0.3 (4) |
C1—N1—C5—C4 | −0.6 (3) | C7—N2—C11—C10 | 0.1 (3) |
Ag1—N1—C5—C4 | 178.56 (16) | Ag1i—N2—C11—C10 | −175.23 (19) |
C1—N1—C5—C6 | −177.88 (19) | C9—C10—C11—N2 | −0.9 (4) |
Ag1—N1—C5—C6 | 1.3 (3) | O3—S1—C12—F2 | −60.1 (2) |
C3—C4—C5—N1 | −0.6 (3) | O1—S1—C12—F2 | 61.6 (2) |
C3—C4—C5—C6 | 176.6 (2) | O2—S1—C12—F2 | −179.73 (18) |
C7—N3—C6—C5 | −77.7 (3) | O3—S1—C12—F3 | −179.98 (18) |
N1—C5—C6—N3 | −46.9 (3) | O1—S1—C12—F3 | −58.2 (2) |
C4—C5—C6—N3 | 135.8 (2) | O2—S1—C12—F3 | 60.4 (2) |
C11—N2—C7—N3 | −178.18 (19) | O3—S1—C12—F1 | 59.5 (2) |
Ag1i—N2—C7—N3 | −3.3 (3) | O1—S1—C12—F1 | −178.74 (19) |
C11—N2—C7—C8 | 1.4 (3) | O2—S1—C12—F1 | −60.1 (2) |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+1, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3N···O2i | 0.88 | 2.16 | 2.925 (3) | 145 |
Symmetry code: (i) −x+2, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Ag2(C11H11N3)2](CF3O3S)2 |
Mr | 884.34 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 173 |
a, b, c (Å) | 8.4105 (5), 9.3500 (6), 11.1693 (7) |
α, β, γ (°) | 108.489 (1), 92.826 (1), 116.606 (1) |
V (Å3) | 725.58 (8) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 1.58 |
Crystal size (mm) | 0.35 × 0.35 × 0.25 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.607, 0.693 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 4132, 2791, 2665 |
Rint | 0.012 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.022, 0.058, 1.07 |
No. of reflections | 2791 |
No. of parameters | 208 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.52, −0.58 |
Computer programs: APEX2 (Bruker, 2006), SAINT (Bruker, 2006), SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1998).
Ag1—N2i | 2.1500 (19) | Ag1—O2 | 2.890 (2) |
Ag1—N1 | 2.1673 (19) | Ag1—O1ii | 3.0402 (18) |
Ag1—N3 | 2.8573 (19) |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+1, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3N···O2i | 0.88 | 2.16 | 2.925 (3) | 144.8 |
Symmetry code: (i) −x+2, −y+1, −z+1. |
Acknowledgements
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011–0006413).
References
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The dipyridyl ligand N-(pyridin-2-ylmethyl)pyridin-2-amine has been synthesized by the reaction of 2-aminopyridine and 2-pyridinecarboxaldehyde according to literature (Foxon et al., 2002) and its crystal structure was already reported by our group (Moon et al., 2011). In the reaction of the ligand and CuX (X = I and Br), two-dimensional brick-wall type coordination polymers, in which rhomboid Cu2X2 nodes interconnect the dipyridyl ligands, were obtained (Lee et al., 2008). Herein, we report the crystal structure of the title compound prepared by the reaction of silver trifluoromethanesulfonate with the dipyridyl ligand.
The binuclear cation of the title compound, [Ag2(C11H11N3)2](CF3SO3)2, is located on an inversion centre. The asymmetric unit of the compound therefore consists of a Ag+ cation, an N-(pyridin-2-ylmethyl)pyridin-2-amine ligand and a trifluoromethanesulfonate anion. The two Ag+ cations, each in a geometry slightly distorted from linear (N–Ag–N 161.02 (7)°), are coordinated by two pyridine N atoms from two symmetry-related N-(pyridine-2-ylmethyl)pyridine-2-amine ligands, leading to the formation of a centrosymmetric 14-membered cyclic dimer (Fig. 1). Two pyridine rings coordinated to the Ag+ cations are tilted by 80.19 (7)° with respect to each other.
The non-coordinated CF3SO3- anions participate in N—H···O hydrogen-bonding (Table 1, Fig. 1) and weak Ag···O interactions, as well as an F···F contact of 2.890 (4) Å. Together with another weak Ag—N contact, this leads to the construction of a two-dimensional network extending parallel to the ac plane (Fig. 2).