Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807044431/lh2497sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807044431/lh2497Isup2.hkl |
CCDC reference: 622553
The title compound was prepared by the addition of ethane-1,2-diamine in methanol to an equimolar amount of K[Ag(CN)2] in water. The solution was stirred for 15 min then filtered and allowed to evaporate slowly in air. Colourless crystals appeared along with some black deposits on the walls of the vessel, which suggested disproportionation of silver(I) to give silver(II) and silver(0).
The H-atoms were included in calculated positions and treated as riding atoms: N—H = 0.92 Å and C—H = 0.99 Å, with Uiso(H) = 1.2Ueq(N or C).
The molecular stucture of the title compound is shown in Fig. 1. The compound crystallized in the chiral space group P212121 as an inversion twin; the refined BASF value is 0.28 (4).
The AgII atom has an almost perfect square planar environement (Table 1). The five-membered chelate ring has an envelope conformation with atom C1 at the flap.
The AgII—N(en) bond distances of 2.071 (2) and 2.078 (2) Å are significantly shorter than the same distances observed in some silver(II) 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane macrocyclic complexes; 2.185 (5) to 2.195 (6) Å (Wang et al., 2002) and 2.194 (3) to 2.196 (3) Å (Po et al., 1991). In the corresponding silver(I) complex, [Ag(CN)en)], prepared solvothermally, the AgI—N(en) distances are 2.283 (6) and 2.355 (6) Å (Pretsch & Hartl, 2005).
In the crystal structure symmetry related molecules are linked by N—H···N(CN) hydrogen bonds to form a three-dimensional network (Fig. 2).
For related literature, see: Pretsch & Hartl (2005); Wang et al. (2002); Po et al. (1991).
Data collection: X-AREA (Stoe & Cie, 2005); cell refinement: X-AREA (Stoe & Cie, 2005); data reduction: X-RED32 (Stoe & Cie, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).
[Ag(CN)2(C2H8N2)] | F(000) = 428 |
Mr = 220.01 | Dx = 2.050 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 6960 reflections |
a = 6.9140 (8) Å | θ = 1.8–28.7° |
b = 9.3481 (11) Å | µ = 2.74 mm−1 |
c = 11.0289 (11) Å | T = 173 K |
V = 712.83 (14) Å3 | Needle, colourless |
Z = 4 | 0.50 × 0.20 × 0.10 mm |
Stoe IPDS II diffractometer | 1913 independent reflections |
Radiation source: fine-focus sealed tube | 1889 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.022 |
φ and ω scans | θmax = 29.1°, θmin = 2.9° |
Absorption correction: multi-scan (MULABS in PLATON; Spek, 2003) | h = −9→9 |
Tmin = 0.539, Tmax = 0.760 | k = −12→12 |
6842 measured reflections | l = −14→15 |
Refinement on F2 | Hydrogen site location: inferred from neighbouring sites |
Least-squares matrix: full | H-atom parameters constrained |
R[F2 > 2σ(F2)] = 0.016 | w = 1/[σ2(Fo2) + (0.0247P)2 + 0.4752P] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.042 | (Δ/σ)max = 0.001 |
S = 1.08 | Δρmax = 0.46 e Å−3 |
1913 reflections | Δρmin = −0.51 e Å−3 |
84 parameters | Extinction correction: SHELXL 97 (Sheldrick, 1997), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
0 restraints | Extinction coefficient: 0.0269 (10) |
Primary atom site location: structure-invariant direct methods | Absolute structure: Flack (1983), with 784 Friedel pairs (99.7%) |
Secondary atom site location: difference Fourier map | Absolute structure parameter: 0.28 (4) |
[Ag(CN)2(C2H8N2)] | V = 712.83 (14) Å3 |
Mr = 220.01 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 6.9140 (8) Å | µ = 2.74 mm−1 |
b = 9.3481 (11) Å | T = 173 K |
c = 11.0289 (11) Å | 0.50 × 0.20 × 0.10 mm |
Stoe IPDS II diffractometer | 1913 independent reflections |
Absorption correction: multi-scan (MULABS in PLATON; Spek, 2003) | 1889 reflections with I > 2σ(I) |
Tmin = 0.539, Tmax = 0.760 | Rint = 0.022 |
6842 measured reflections |
R[F2 > 2σ(F2)] = 0.016 | H-atom parameters constrained |
wR(F2) = 0.042 | Δρmax = 0.46 e Å−3 |
S = 1.08 | Δρmin = −0.51 e Å−3 |
1913 reflections | Absolute structure: Flack (1983), with 784 Friedel pairs (99.7%) |
84 parameters | Absolute structure parameter: 0.28 (4) |
0 restraints |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
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 | 0.31636 (2) | 0.86283 (2) | 0.26335 (1) | 0.0170 (1) | |
N1 | 0.1329 (3) | 0.7590 (2) | 0.3838 (2) | 0.0200 (6) | |
N2 | 0.1723 (3) | 0.7398 (2) | 0.13599 (18) | 0.0198 (5) | |
N3 | 0.5059 (3) | 1.0508 (2) | 0.4625 (2) | 0.0265 (6) | |
N4 | 0.5486 (4) | 1.0323 (3) | 0.0698 (2) | 0.0269 (6) | |
C1 | −0.0334 (4) | 0.7046 (3) | 0.3122 (2) | 0.0247 (6) | |
C2 | 0.0448 (4) | 0.6364 (3) | 0.1993 (2) | 0.0268 (6) | |
C3 | 0.4387 (4) | 0.9800 (2) | 0.3892 (2) | 0.0196 (6) | |
C4 | 0.4706 (4) | 0.9651 (3) | 0.1414 (2) | 0.0204 (6) | |
H1NA | 0.19650 | 0.68450 | 0.42100 | 0.0240* | |
H1A | −0.12130 | 0.78440 | 0.29080 | 0.0300* | |
H1B | −0.10710 | 0.63360 | 0.36010 | 0.0300* | |
H1NB | 0.09080 | 0.82150 | 0.44250 | 0.0240* | |
H2A | 0.11910 | 0.54940 | 0.22070 | 0.0320* | |
H2B | −0.06310 | 0.60800 | 0.14550 | 0.0320* | |
H2NA | 0.09970 | 0.79770 | 0.08630 | 0.0240* | |
H2NB | 0.26030 | 0.69130 | 0.08880 | 0.0240* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ag1 | 0.0170 (1) | 0.0154 (1) | 0.0187 (1) | −0.0005 (1) | 0.0004 (1) | 0.0002 (1) |
N1 | 0.0218 (10) | 0.0187 (9) | 0.0195 (10) | −0.0020 (7) | 0.0021 (7) | 0.0031 (8) |
N2 | 0.0204 (9) | 0.0184 (9) | 0.0207 (9) | −0.0039 (9) | −0.0009 (9) | −0.0017 (7) |
N3 | 0.0250 (11) | 0.0283 (11) | 0.0261 (11) | −0.0039 (8) | −0.0002 (8) | −0.0037 (9) |
N4 | 0.0252 (10) | 0.0304 (11) | 0.0252 (11) | −0.0051 (10) | 0.0005 (9) | 0.0003 (9) |
C1 | 0.0223 (10) | 0.0255 (11) | 0.0264 (12) | −0.0071 (9) | 0.0016 (9) | 0.0010 (10) |
C2 | 0.0318 (11) | 0.0209 (9) | 0.0278 (11) | −0.0119 (11) | 0.0012 (10) | −0.0019 (11) |
C3 | 0.0182 (10) | 0.0195 (10) | 0.0210 (11) | −0.0009 (9) | 0.0016 (9) | 0.0028 (9) |
C4 | 0.0173 (10) | 0.0228 (10) | 0.0212 (11) | −0.0023 (9) | −0.0005 (9) | −0.0006 (9) |
Ag1—N1 | 2.078 (2) | N1—H1NB | 0.9200 |
Ag1—N2 | 2.071 (2) | N2—H2NA | 0.9200 |
Ag1—C3 | 1.960 (2) | N2—H2NB | 0.9200 |
Ag1—C4 | 1.965 (3) | C1—C2 | 1.500 (3) |
N1—C1 | 1.485 (3) | C1—H1A | 0.9900 |
N2—C2 | 1.483 (3) | C1—H1B | 0.9900 |
N3—C3 | 1.143 (3) | C2—H2A | 0.9900 |
N4—C4 | 1.144 (4) | C2—H2B | 0.9900 |
N1—H1NA | 0.9200 | ||
N1—Ag1—N2 | 83.14 (8) | C2—N2—H2NA | 110.00 |
N1—Ag1—C3 | 94.12 (9) | C2—N2—H2NB | 110.00 |
N1—Ag1—C4 | 175.20 (10) | N1—C1—C2 | 107.9 (2) |
N2—Ag1—C3 | 176.69 (10) | N2—C2—C1 | 109.2 (2) |
N2—Ag1—C4 | 93.84 (9) | Ag1—C3—N3 | 178.2 (2) |
C3—Ag1—C4 | 88.78 (10) | Ag1—C4—N4 | 174.6 (3) |
Ag1—N1—C1 | 107.03 (15) | N1—C1—H1A | 110.00 |
Ag1—N2—C2 | 109.18 (14) | N1—C1—H1B | 110.00 |
C1—N1—H1NB | 110.00 | C2—C1—H1A | 110.00 |
H1NA—N1—H1NB | 109.00 | C2—C1—H1B | 110.00 |
Ag1—N1—H1NB | 110.00 | H1A—C1—H1B | 108.00 |
C1—N1—H1NA | 110.00 | N2—C2—H2A | 110.00 |
Ag1—N1—H1NA | 110.00 | N2—C2—H2B | 110.00 |
Ag1—N2—H2NA | 110.00 | C1—C2—H2A | 110.00 |
Ag1—N2—H2NB | 110.00 | C1—C2—H2B | 110.00 |
H2NA—N2—H2NB | 108.00 | H2A—C2—H2B | 108.00 |
N2—Ag1—N1—C1 | −20.61 (15) | Ag1—N1—C1—C2 | 45.1 (2) |
C3—Ag1—N1—C1 | 157.53 (16) | Ag1—N2—C2—C1 | 34.7 (2) |
N1—Ag1—N2—C2 | −7.65 (16) | N1—C1—C2—N2 | −53.5 (3) |
C4—Ag1—N2—C2 | 176.10 (17) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1NA···N4i | 0.92 | 2.27 | 3.099 (3) | 150 |
N1—H1NB···N4ii | 0.92 | 2.18 | 3.097 (3) | 172 |
N2—H2NA···N3iii | 0.92 | 2.10 | 3.002 (3) | 167 |
N2—H2NB···N3i | 0.92 | 2.16 | 3.042 (3) | 161 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) −x+1/2, −y+2, z+1/2; (iii) −x+1/2, −y+2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [Ag(CN)2(C2H8N2)] |
Mr | 220.01 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 173 |
a, b, c (Å) | 6.9140 (8), 9.3481 (11), 11.0289 (11) |
V (Å3) | 712.83 (14) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 2.74 |
Crystal size (mm) | 0.50 × 0.20 × 0.10 |
Data collection | |
Diffractometer | Stoe IPDS II |
Absorption correction | Multi-scan (MULABS in PLATON; Spek, 2003) |
Tmin, Tmax | 0.539, 0.760 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6842, 1913, 1889 |
Rint | 0.022 |
(sin θ/λ)max (Å−1) | 0.685 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.016, 0.042, 1.08 |
No. of reflections | 1913 |
No. of parameters | 84 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.46, −0.51 |
Absolute structure | Flack (1983), with 784 Friedel pairs (99.7%) |
Absolute structure parameter | 0.28 (4) |
Computer programs: X-AREA (Stoe & Cie, 2005), X-RED32 (Stoe & Cie, 2005), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), PLATON (Spek, 2003).
Ag1—N1 | 2.078 (2) | Ag1—C3 | 1.960 (2) |
Ag1—N2 | 2.071 (2) | Ag1—C4 | 1.965 (3) |
N1—Ag1—N2 | 83.14 (8) | N2—Ag1—C4 | 93.84 (9) |
N1—Ag1—C3 | 94.12 (9) | C3—Ag1—C4 | 88.78 (10) |
N1—Ag1—C4 | 175.20 (10) | Ag1—N1—C1 | 107.03 (15) |
N2—Ag1—C3 | 176.69 (10) | Ag1—N2—C2 | 109.18 (14) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1NA···N4i | 0.92 | 2.27 | 3.099 (3) | 150 |
N1—H1NB···N4ii | 0.92 | 2.18 | 3.097 (3) | 172 |
N2—H2NA···N3iii | 0.92 | 2.10 | 3.002 (3) | 167 |
N2—H2NB···N3i | 0.92 | 2.16 | 3.042 (3) | 161 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) −x+1/2, −y+2, z+1/2; (iii) −x+1/2, −y+2, z−1/2. |
The molecular stucture of the title compound is shown in Fig. 1. The compound crystallized in the chiral space group P212121 as an inversion twin; the refined BASF value is 0.28 (4).
The AgII atom has an almost perfect square planar environement (Table 1). The five-membered chelate ring has an envelope conformation with atom C1 at the flap.
The AgII—N(en) bond distances of 2.071 (2) and 2.078 (2) Å are significantly shorter than the same distances observed in some silver(II) 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane macrocyclic complexes; 2.185 (5) to 2.195 (6) Å (Wang et al., 2002) and 2.194 (3) to 2.196 (3) Å (Po et al., 1991). In the corresponding silver(I) complex, [Ag(CN)en)], prepared solvothermally, the AgI—N(en) distances are 2.283 (6) and 2.355 (6) Å (Pretsch & Hartl, 2005).
In the crystal structure symmetry related molecules are linked by N—H···N(CN) hydrogen bonds to form a three-dimensional network (Fig. 2).