Poly[bis(μ2-cyanido)-κ2C:N;κ2N:C-(μ2-N,N,N′,N′-tetramethylthiourea-κ2S:S)disilver(I)]

Hanif, M.; Ahmad, S.; Altaf, M.; Stoeckli-Evans, H.

doi:10.1107/S1600536807044844

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Poly[bis(μ₂-cyanido)-κ²C:N;κ²N:C-(μ₂-N,N,N′,N′-tetramethylthiourea-κ²S:S)disilver(I)]

M. Hanif, S. Ahmad, M. Altaf and H. Stoeckli-Evans

The title compound, [Ag₂(CN)₂(C₅H₁₂N₂S)]_n, crystallizes as an infinite three-dimensional framework structure. It exists in an unusual ionic form, the asymmetric unit being composed of a cation [(μ-tetramethylthiourea-S)Ag]⁺ and an anion [(Ag(CN)₂]⁻. The thiourea S atom is coordinated asymmetrically to silver ions, linking two almost parallel chains. The same silver atom is linked to a symmetry-related atom by the [Ag(CN)₂]⁻ anion. In this way, a three-dimensional structure is built up. The shortest Ag

Ag intermolecular contact distance involves the silver atom in the [Ag(CN)₂]⁻ anion [Ag

Ag 3.6965 (5) Å].

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Supporting information

	Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807044844/bq2035sup1.cif Contains datablocks I, global
	Structure factor file (CIF format) https://doi.org/10.1107/S1600536807044844/bq2035Isup2.hkl Contains datablock I

CCDC reference: 663643

checkCIF report

Key indicators

Single-crystal X-ray study
T = 173 K
Mean (N-C) = 0.005 Å
R factor = 0.030
wR factor = 0.070
Data-to-parameter ratio = 24.9

checkCIF/PLATON results

No syntax errors found



Alert level C
ABSTM02_ALERT_3_C  The ratio of expected to reported Tmax/Tmin(RR') is < 0.90
            Tmin and Tmax reported:      0.402     0.709
            Tmin(prime) and Tmax expected:      0.498     0.713
            RR(prime) =      0.812
            Please check that your absorption correction is appropriate.
PLAT061_ALERT_3_C Tmax/Tmin Range Test RR' too Large .............       0.79

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   2 ALERT level C = Check and explain
   0 ALERT level G = General alerts; check

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   0 ALERT type 2 Indicator that the structure model may be wrong or deficient
   2 ALERT type 3 Indicator that the structure quality may be low
   0 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

Comment top

The structure of the asymmetric unit of the title compound is shown in Fig. 1. The reaction of the silver nitrate complex of tetramethylthiourea with KCN lead to the formation of an unusual ionic three dimensional polymer. The asymmetric unit is composed of a cation, [(µ-tetramethylthiourea-S)Ag]⁺, and an anion, [(Ag(CN)₂]^-. The S-atom of the cation asymmetrically bridges two silver Ag1 atoms in two almost parallel symmetry related chains; bond distance S1—Ag1 is 2.4990 (9) Å, while distance S1—Ag1ⁱ is 2.7075 (9) Å [symmetry operation (i) = x + 1/2, -y + 1/2, -z]. The Ag1 atoms in these chains are further linked via the N-atoms of the [(Ag(CN)₂]^- anions (Fig. 2), so building up the three dimensional framework.

The Ag1—N(CN) distances are normal [2.288 (3) and 2.242 (3) Å], as are the Ag2—C distances [2.047 (3) and 2.048 (3) Å], indicating no disorder of the C≡N bonds. The reaction of tetramethylthiourea with AgCN lead to the formation of a one-dimensional chiral polymer (Stocker et al., 2000). There the cyanide groups, coordinated to equivalent Ag atoms, have equal distances at both ends (2.155 (4) Å) and are completely disordered.

In the crystal structure the shortest Ag···Ag intermolecular contact distance involves atom Ag2 of the [Ag(CN)₂]^- anion; distance Ag2···Ag2ⁱⁱⁱ is equal to 3.6965 (5) Å [symmetry operation (iii) = x - 1/2, y, -z - 1/2].

Related literature top

For related literature, see: Stocker et al. (2000).

Experimental top

The title compound was prepared by adding 2 mmol of tetramethylthiourea in 15–20 ml of methanol to 1 mmol (0.17 g) of AgNO₃, followed by the addition of 1 mmol of KCN dissolved in 15 - 20 ml of distilled water. A clear solution was obtained and was stirred for ca 30 min. The solution was filtered and the filtrate allowed to evaporate slowly at room temperature, giving colorless block-like crystals.

Structure description top

For related literature, see: Stocker et al. (2000).

Computing details top

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: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).

Figures top

	Fig. 1. The asymmetric unit of compound (I), showing the atomic numbering scheme and displacement parameters drawn at the 50% probabilty level.
	Fig. 2. The crystal packing of compound (I) viewed along the a axis. The hydrogen atoms and C and N-atoms of the thiourea moiety have been omitted for clarity.

Poly[di-µ₂-cyanido-κ²C:N;κ²N:C-µ₂-N,N,N',N'- tetramethylthiourea-κ²S:S-disilver(I)] top

Crystal data top

[Ag₂(CN)₂(C₅H₁₂N₂S)]	F(000) = 1536
M_r = 400.01	D_x = 2.195 Mg m⁻³
Orthorhombic, Pbca	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2ab	Cell parameters from 23959 reflections
a = 7.3563 (4) Å	θ = 1.8–29.6°
b = 15.6735 (11) Å	µ = 3.38 mm⁻¹
c = 20.9978 (16) Å	T = 173 K
V = 2421.0 (3) Å³	Block, colourless
Z = 8	0.20 × 0.20 × 0.10 mm

Data collection top

Stoe IPDS-2 diffractometer	3284 independent reflections
Radiation source: fine-focus sealed tube	2731 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.070
φ and ω scans	θ_max = 29.3°, θ_min = 1.9°
Absorption correction: multi-scan (MULscanABS in PLATON; Spek, 2003)	h = −10→9
T_min = 0.402, T_max = 0.709	k = −21→21
32772 measured reflections	l = −28→28

Refinement top

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)] = 0.030	H-atom parameters constrained
wR(F²) = 0.070	w = 1/[σ²(F_o²) + (0.0265P)² + 3.3418P] where P = (F_o² + 2F_c²)/3
S = 1.07	(Δ/σ)_max < 0.001
3284 reflections	Δρ_max = 0.46 e Å⁻³
132 parameters	Δρ_min = −0.94 e Å⁻³
0 restraints	Extinction correction: SHELXL, Fc^*=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4
Primary atom site location: structure-invariant direct methods	Extinction coefficient: 0.00073 (8)

Crystal data top

[Ag₂(CN)₂(C₅H₁₂N₂S)]	V = 2421.0 (3) Å³
M_r = 400.01	Z = 8
Orthorhombic, Pbca	Mo Kα radiation
a = 7.3563 (4) Å	µ = 3.38 mm⁻¹
b = 15.6735 (11) Å	T = 173 K
c = 20.9978 (16) Å	0.20 × 0.20 × 0.10 mm

Data collection top

Stoe IPDS-2 diffractometer	3284 independent reflections
Absorption correction: multi-scan (MULscanABS in PLATON; Spek, 2003)	2731 reflections with I > 2σ(I)
T_min = 0.402, T_max = 0.709	R_int = 0.070
32772 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.030	0 restraints
wR(F²) = 0.070	H-atom parameters constrained
S = 1.07	Δρ_max = 0.46 e Å⁻³
3284 reflections	Δρ_min = −0.94 e Å⁻³
132 parameters

Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
Ag1	0.34332 (3)	0.25371 (2)	−0.08070 (1)	0.0319 (1)
Ag2	0.51946 (4)	−0.00703 (2)	−0.24123 (1)	0.0409 (1)
S1	0.16344 (11)	0.22840 (6)	0.01848 (4)	0.0326 (2)
N1	0.3533 (4)	0.25257 (19)	0.12435 (13)	0.0349 (8)
N2	0.3000 (4)	0.37387 (19)	0.06475 (13)	0.0340 (8)
N3	0.3898 (5)	0.1365 (2)	−0.14355 (15)	0.0412 (10)
N4	0.3563 (5)	0.3562 (2)	−0.15502 (16)	0.0425 (10)
C1	0.2806 (5)	0.2894 (2)	0.07285 (15)	0.0304 (9)
C2	0.3721 (6)	0.2957 (3)	0.18619 (17)	0.0526 (15)
C3	0.3799 (5)	0.1602 (3)	0.1272 (2)	0.0447 (12)
C4	0.1848 (6)	0.4213 (3)	0.02035 (18)	0.0437 (11)
C5	0.4564 (6)	0.4223 (3)	0.0878 (2)	0.0520 (14)
C6	0.4379 (5)	0.0842 (2)	−0.17756 (17)	0.0367 (10)
C7	0.3986 (6)	0.4043 (2)	−0.19317 (17)	0.0378 (10)
H2A	0.30460	0.34960	0.18540	0.0780*
H2B	0.50090	0.30730	0.19450	0.0780*
H2C	0.32340	0.25900	0.21990	0.0780*
H3A	0.26920	0.13310	0.14350	0.0670*
H3B	0.48190	0.14720	0.15560	0.0670*
H3C	0.40620	0.13850	0.08440	0.0670*
H4A	0.06390	0.39510	0.01880	0.0660*
H4B	0.23930	0.42000	−0.02220	0.0660*
H4C	0.17390	0.48060	0.03470	0.0660*
H5A	0.54660	0.38290	0.10560	0.0780*
H5B	0.41690	0.46230	0.12080	0.0780*
H5C	0.51080	0.45400	0.05240	0.0780*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Ag1	0.0352 (1)	0.0369 (1)	0.0236 (1)	−0.0003 (1)	0.0017 (1)	−0.0003 (1)
Ag2	0.0590 (2)	0.0348 (1)	0.0290 (1)	0.0060 (1)	−0.0008 (1)	−0.0063 (1)
S1	0.0276 (4)	0.0458 (4)	0.0245 (3)	−0.0063 (3)	0.0019 (3)	−0.0043 (3)
N1	0.0337 (14)	0.0465 (16)	0.0246 (12)	0.0047 (13)	−0.0024 (11)	−0.0015 (12)
N2	0.0328 (15)	0.0401 (15)	0.0292 (13)	0.0021 (12)	−0.0053 (12)	−0.0058 (12)
N3	0.0458 (18)	0.0419 (16)	0.0358 (16)	−0.0038 (13)	0.0028 (14)	−0.0075 (13)
N4	0.0450 (19)	0.0447 (16)	0.0377 (16)	−0.0011 (14)	−0.0037 (14)	0.0085 (14)
C1	0.0268 (14)	0.0400 (17)	0.0243 (14)	0.0031 (13)	0.0021 (12)	−0.0029 (13)
C2	0.056 (3)	0.078 (3)	0.0237 (16)	0.015 (2)	−0.0075 (16)	−0.0088 (18)
C3	0.039 (2)	0.051 (2)	0.044 (2)	0.0043 (16)	−0.0001 (16)	0.0111 (18)
C4	0.048 (2)	0.045 (2)	0.0382 (18)	0.0076 (17)	−0.0065 (17)	0.0007 (16)
C5	0.049 (2)	0.049 (2)	0.058 (3)	−0.0059 (19)	−0.013 (2)	−0.0116 (19)
C6	0.044 (2)	0.0343 (16)	0.0317 (17)	−0.0023 (14)	0.0013 (14)	−0.0039 (14)
C7	0.047 (2)	0.0347 (17)	0.0316 (17)	−0.0025 (15)	−0.0029 (15)	0.0030 (14)

Geometric parameters (Å, º) top

Ag1—S1	2.4990 (9)	N4—C7	1.143 (5)
Ag1—N3	2.288 (3)	C2—H2A	0.9800
Ag1—N4	2.242 (3)	C2—H2B	0.9800
Ag1—S1ⁱ	2.7075 (9)	C2—H2C	0.9800
Ag2—C6	2.047 (3)	C3—H3A	0.9800
Ag2—C7ⁱⁱ	2.048 (3)	C3—H3B	0.9800
S1—C1	1.721 (3)	C3—H3C	0.9800
N1—C1	1.337 (4)	C4—H4A	0.9800
N1—C2	1.470 (5)	C4—H4B	0.9800
N1—C3	1.462 (6)	C4—H4C	0.9800
N2—C1	1.342 (4)	C5—H5A	0.9800
N2—C4	1.463 (5)	C5—H5B	0.9800
N2—C5	1.461 (5)	C5—H5C	0.9800
N3—C6	1.143 (5)

Ag1···C4	3.572 (4)	C6···C2^vi	3.459 (5)
Ag1···C4ⁱ	3.929 (5)	C6···Ag2^vii	3.798 (4)
Ag1···C5ⁱⁱⁱ	3.967 (5)	C7···Ag2^x	3.523 (4)
Ag1···N1ⁱⁱⁱ	3.721 (3)	C2···H5A	2.5300
Ag1···C1ⁱⁱⁱ	4.198 (4)	C2···H5B	2.9700
Ag1···C2ⁱⁱⁱ	4.186 (4)	C5···H2B	2.8900
Ag1···C3ⁱⁱⁱ	3.794 (4)	C5···H2A	2.6000
Ag1···C3ⁱ	4.284 (4)	C6···H2Aⁱ	2.8900
Ag2···C6^iv	3.798 (4)	C7···H3Aⁱ	2.9800
Ag2···C3^v	3.471 (4)	C7···H5B^xii	2.9200
Ag2···C2^vi	3.804 (5)	H2A···N2	2.5600
Ag2···C5^vi	3.856 (4)	H2A···C5	2.6000
Ag2···Ag2^vii	3.6965 (5)	H2A···H5A	2.5000
Ag2···Ag2^iv	3.6965 (5)	H2A···H5B	2.3800
Ag2···N4^viii	3.939 (3)	H2A···Ag2ⁱⁱⁱ	3.4400
Ag2···C7^viii	3.523 (4)	H2A···C6ⁱⁱⁱ	2.8900
Ag1···H3Cⁱⁱⁱ	3.6300	H2A···Ag2^xi	3.3100
Ag1···H4A	3.6700	H2B···C5	2.8900
Ag1···H2Bⁱⁱⁱ	3.6000	H2B···H5A	2.2400
Ag1···H3Bⁱⁱⁱ	3.4600	H2B···Ag1ⁱ	3.6000
Ag1···H4Aⁱ	3.1200	H2B···Ag2^xi	3.4100
Ag1···H5Aⁱⁱⁱ	3.1000	H2C···H3A	2.5700
Ag1···H4B	2.9800	H2C···H3B	2.5000
Ag2···H3A^ix	3.7800	H3A···S1	3.1200
Ag2···H2Aⁱ	3.4400	H3A···H2C	2.5700
Ag2···H3A^v	3.2500	H3A···Ag2^xiii	3.7800
Ag2···H3B^v	2.8400	H3A···C7ⁱⁱⁱ	2.9800
Ag2···H2A^vi	3.3100	H3A···Ag2^v	3.2500
Ag2···H2B^vi	3.4100	H3B···H2C	2.5000
Ag2···H5A^vi	3.7600	H3B···Ag1ⁱ	3.4600
Ag2···H5B^vi	3.0700	H3B···N4ⁱ	2.7500
S1···C1ⁱⁱⁱ	3.419 (4)	H3B···Ag2^v	2.8400
S1···C5ⁱⁱⁱ	3.589 (5)	H3C···S1	2.6600
S1···H3A	3.1200	H3C···Ag1ⁱ	3.6300
S1···H4B	3.1700	H3C···H4Aⁱ	2.5100
S1···H3C	2.6600	H4A···Ag1	3.6700
S1···H4A	2.7100	H4A···S1	2.7100
N1···Ag1ⁱ	3.721 (3)	H4A···Ag1ⁱⁱⁱ	3.1200
N3···C1ⁱ	3.438 (5)	H4A···H3Cⁱⁱⁱ	2.5100
N4···Ag2^x	3.939 (3)	H4B···Ag1	2.9800
N1···H5A	2.5200	H4B···S1	3.1700
N2···H2A	2.5600	H4B···H5C	2.5900
N3···H5Aⁱⁱⁱ	2.6600	H4C···H5B	2.5600
N4···H3Bⁱⁱⁱ	2.7500	H4C···H5C	2.5400
C1···Ag1ⁱ	4.198 (4)	H5A···N1	2.5200
C2···C5	2.931 (6)	H5A···C2	2.5300
C2···Ag2^xi	3.804 (5)	H5A···H2A	2.5000
C2···C6^xi	3.459 (5)	H5A···H2B	2.2400
C2···Ag1ⁱ	4.186 (4)	H5A···Ag1ⁱ	3.1000
C3···Ag2^v	3.471 (4)	H5A···N3ⁱ	2.6600
C3···Ag1ⁱⁱⁱ	4.284 (4)	H5A···Ag2^xi	3.7600
C3···Ag1ⁱ	3.794 (4)	H5B···C2	2.9700
C4···Ag1	3.572 (4)	H5B···H2A	2.3800
C4···Ag1ⁱⁱⁱ	3.929 (5)	H5B···H4C	2.5600
C5···Ag2^xi	3.856 (4)	H5B···C7^xii	2.9200
C5···S1ⁱ	3.589 (5)	H5B···Ag2^xi	3.0700
C5···C2	2.931 (6)	H5C···H4B	2.5900
C5···Ag1ⁱ	3.967 (5)	H5C···H4C	2.5400

S1—Ag1—N3	115.62 (9)	N1—C2—H2B	109.00
S1—Ag1—N4	135.76 (9)	N1—C2—H2C	109.00
S1—Ag1—S1ⁱ	94.30 (3)	H2A—C2—H2B	109.00
N3—Ag1—N4	99.64 (12)	H2A—C2—H2C	109.00
S1ⁱ—Ag1—N3	103.39 (9)	H2B—C2—H2C	109.00
S1ⁱ—Ag1—N4	102.98 (9)	N1—C3—H3A	109.00
C6—Ag2—C7ⁱⁱ	178.41 (13)	N1—C3—H3B	109.00
Ag1—S1—C1	101.51 (12)	N1—C3—H3C	109.00
Ag1—S1—Ag1ⁱⁱⁱ	147.80 (4)	H3A—C3—H3B	109.00
Ag1ⁱⁱⁱ—S1—C1	93.32 (12)	H3A—C3—H3C	109.00
C1—N1—C2	123.6 (3)	H3B—C3—H3C	110.00
C1—N1—C3	120.9 (3)	N2—C4—H4A	110.00
C2—N1—C3	114.0 (3)	N2—C4—H4B	109.00
C1—N2—C4	121.4 (3)	N2—C4—H4C	109.00
C1—N2—C5	123.7 (3)	H4A—C4—H4B	109.00
C4—N2—C5	113.8 (3)	H4A—C4—H4C	109.00
Ag1—N3—C6	169.2 (3)	H4B—C4—H4C	109.00
Ag1—N4—C7	166.4 (3)	N2—C5—H5A	109.00
S1—C1—N1	119.8 (2)	N2—C5—H5B	109.00
S1—C1—N2	121.2 (2)	N2—C5—H5C	110.00
N1—C1—N2	119.1 (3)	H5A—C5—H5B	110.00
Ag2—C6—N3	177.8 (3)	H5A—C5—H5C	109.00
Ag2^xiv—C7—N4	177.7 (3)	H5B—C5—H5C	109.00
N1—C2—H2A	109.00

N3—Ag1—S1—C1	139.11 (15)	Ag1—S1—C1—N1	−120.5 (3)
N3—Ag1—S1—Ag1ⁱⁱⁱ	−105.15 (12)	Ag1—S1—C1—N2	59.8 (3)
N4—Ag1—S1—C1	−81.55 (18)	Ag1ⁱⁱⁱ—S1—C1—N1	88.3 (3)
N4—Ag1—S1—Ag1ⁱⁱⁱ	34.19 (16)	Ag1ⁱⁱⁱ—S1—C1—N2	−91.4 (3)
S1ⁱ—Ag1—S1—C1	32.04 (12)	C2—N1—C1—S1	−148.1 (3)
S1ⁱ—Ag1—S1—Ag1ⁱⁱⁱ	147.78 (7)	C2—N1—C1—N2	31.6 (5)
S1—Ag1—S1ⁱ—Ag1ⁱ	18.94 (8)	C3—N1—C1—S1	17.1 (5)
S1—Ag1—S1ⁱ—C1ⁱ	136.79 (11)	C3—N1—C1—N2	−163.2 (3)
N3—Ag1—S1ⁱ—Ag1ⁱ	−98.68 (11)	C4—N2—C1—S1	16.8 (5)
N3—Ag1—S1ⁱ—C1ⁱ	19.17 (14)	C4—N2—C1—N1	−162.9 (3)
N4—Ag1—S1ⁱ—Ag1ⁱ	157.94 (11)	C5—N2—C1—S1	−149.9 (3)
N4—Ag1—S1ⁱ—C1ⁱ	−84.21 (14)	C5—N2—C1—N1	30.4 (5)

Symmetry codes: (i) x+1/2, −y+1/2, −z; (ii) −x+1, y−1/2, −z−1/2; (iii) x−1/2, −y+1/2, −z; (iv) x+1/2, y, −z−1/2; (v) −x+1, −y, −z; (vi) x, −y+1/2, z−1/2; (vii) x−1/2, y, −z−1/2; (viii) −x+1/2, y−1/2, z; (ix) −x+1/2, −y, z−1/2; (x) −x+1/2, y+1/2, z; (xi) x, −y+1/2, z+1/2; (xii) −x+1, −y+1, −z; (xiii) −x+1/2, −y, z+1/2; (xiv) −x+1, y+1/2, −z−1/2.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C5—H5A···N1	0.98	2.52	2.871 (6)	101

Experimental details

Crystal data
Chemical formula	[Ag₂(CN)₂(C₅H₁₂N₂S)]
M_r	400.01
Crystal system, space group	Orthorhombic, Pbca
Temperature (K)	173
a, b, c (Å)	7.3563 (4), 15.6735 (11), 20.9978 (16)
V (Å³)	2421.0 (3)
Z	8
Radiation type	Mo Kα
µ (mm⁻¹)	3.38
Crystal size (mm)	0.20 × 0.20 × 0.10

Data collection
Diffractometer	Stoe IPDS2
Absorption correction	Multi-scan (MULscanABS in PLATON; Spek, 2003)
T_min, T_max	0.402, 0.709
No. of measured, independent and observed [I > 2σ(I)] reflections	32772, 3284, 2731
R_int	0.070
(sin θ/λ)_max (Å⁻¹)	0.689

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.030, 0.070, 1.07
No. of reflections	3284
No. of parameters	132
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.46, −0.94

Computer programs: X-AREA (Stoe & Cie, 2005), X-RED32 (Stoe & Cie, 2005), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2006).

Selected geometric parameters (Å, º) top

Ag1—S1	2.4990 (9)	Ag1—S1ⁱ	2.7075 (9)
Ag1—N3	2.288 (3)	Ag2—C6	2.047 (3)
Ag1—N4	2.242 (3)	Ag2—C7ⁱⁱ	2.048 (3)

Ag2···Ag2ⁱⁱⁱ	3.6965 (5)	Ag2···Ag2^iv	3.6965 (5)

S1—Ag1—N3	115.62 (9)	S1ⁱ—Ag1—N4	102.98 (9)
S1—Ag1—N4	135.76 (9)	C6—Ag2—C7ⁱⁱ	178.41 (13)
S1—Ag1—S1ⁱ	94.30 (3)	Ag1—S1—C1	101.51 (12)
N3—Ag1—N4	99.64 (12)	Ag1—S1—Ag1^v	147.80 (4)
S1ⁱ—Ag1—N3	103.39 (9)	Ag1^v—S1—C1	93.32 (12)

Symmetry codes: (i) x+1/2, −y+1/2, −z; (ii) −x+1, y−1/2, −z−1/2; (iii) x−1/2, y, −z−1/2; (iv) x+1/2, y, −z−1/2; (v) x−1/2, −y+1/2, −z.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C5—H5A···N1	0.98	2.52	2.871 (6)	101

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