Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807028875/is2178sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807028875/is2178Isup2.hkl |
CCDC reference: 654778
Key indicators
- Single-crystal X-ray study
- T = 110 K
- Mean (C-C) = 0.006 Å
- R factor = 0.038
- wR factor = 0.099
- Data-to-parameter ratio = 13.8
checkCIF/PLATON results
No syntax errors found
Alert level C PLAT094_ALERT_2_C Ratio of Maximum / Minimum Residual Density .... 3.89 PLAT241_ALERT_2_C Check High Ueq as Compared to Neighbors for O1 PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for N2
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 3 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 3 ALERT type 2 Indicator that the structure model may be wrong or deficient 0 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
For related literature, see: Cingolani et al. (2006); Feazell et al. (2005); Klausmeyer et al. (2004); Murso & Stalke (2004); Sandee & Reek (2006).
The title compound was obtained by mixing AgNO3 (0.051 g, 0.3 mmol) and PPh2(2-CH2C5H4N) (0.083 g, 0.3 mmol) in 20 ml of acetonitrile. The mixture was stirred for 10 min and pulled dry under vacuum. Diffraction-quality crystals were obtained by slow diffusion of diethyl ether into a concentrated N,N-dimethylformamide solution of (I) in the presence of air.
All H atoms were included in calculated positions (C—H = 0.95–0.99 Å) and refined as riding, with Uiso(H) = 1.2Ueq(C). The highest residual electron density peak is located 1.11 Å from atom Ag1.
The study of silver coordinated complexes using P,N based ligands is a well established field of research, with reports that describe the formation of a large variety of coordination modes associated with variation in the ligand/metal ratio or by changes in the solvent or counterion in charged systems (Cingolani et al., 2006; Feazell et al., 2005). The well known 2-(phosphinomethyl)pyridyl family of ligands of the type PPhxCH2py3 - x (x = 0, 1, 2) have been widely used in coordination chemistry associated with transition metals and applications in the catalysis arena, due to the geometrical flexibility and electronic properties that these phosphine ligands exhibit (Murso & Stalke, 2004; Sandee & Reek, 2006). The diphenyl(2-pyridylmethyl)phosphine is of special interest because as a bidentate ligand it can connect two identical or different metal centers, allowing for a close proximity and direct metal-metal interactions. The use of silver starting materials and these P,N based ligands have received great attention lately because of the flexible coordination sphere of the silver centers, allowing it to take different structural motifs (Klausmeyer et al., 2004). Thus, following this research line we present in this study the synthesis of a silver-based dinuclear complex, obtained by the reaction of the diphenyl(2-pyridylmethyl)phosphine ligand with silver nitrate in a 1:1 ratio.
The title compound, (I), consists of two phosphine ligands coordinated head-to-tail to two silver atoms across the Ag—Ag axis, and the nitrate anions bound to the metal centers in a unidentate fashion. Accordingly, the AgI atom in (I) is four-coordinated by one P atom, one N atom, an O atom from the nitrate anion, and a Ag atom with which the metallophilic interaction occurs. The coordination sphere of the metal centers reveal a distorted tetrahedral environment with angles ranging between 87.23 (3) and 132.1 (9)°. The flexibility of the ligand is evidenced by a twisting angle of 77.4 (4)° for P1—C1—C2—N1. The Ag—P and Ag—N distances fall in the range of reported values. The NO3 anions coordinated to the corresponding silver atoms through one of the oxygen atoms, are bounded perpendicular to the Ag—Ag bond with an angle of 89.21 (11)° for O1—Ag1—Ag1i [symmetry code: (i) -x, -y, -z].
For related literature, see: Cingolani et al. (2006); Feazell et al. (2005); Klausmeyer et al. (2004); Murso & Stalke (2004); Sandee & Reek (2006).
Data collection: APEX2 (Bruker, 2003); cell refinement: APEX2; data reduction: SAINT-Plus (Bruker, 2003); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Sheldrick, 2000); software used to prepare material for publication: SHELXTL.
[Ag2(NO3)2(C18H16NP)2] | F(000) = 1792 |
Mr = 894.34 | Dx = 1.673 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 7549 reflections |
a = 13.7678 (19) Å | θ = 2.9–27.9° |
b = 12.7143 (17) Å | µ = 1.25 mm−1 |
c = 20.364 (3) Å | T = 110 K |
β = 95.251 (5)° | Block, colorless |
V = 3549.7 (9) Å3 | 0.32 × 0.10 × 0.09 mm |
Z = 4 |
Bruker APEX X8 CCD area-detector diffractometer | 3109 independent reflections |
Radiation source: fine-focus sealed tube | 2726 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.044 |
φ and ω scans | θmax = 25.0°, θmin = 2.5° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −16→16 |
Tmin = 0.70, Tmax = 0.89 | k = −11→15 |
17376 measured reflections | l = −24→24 |
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)] = 0.038 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.099 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.047P)2 + 24.9163P] where P = (Fo2 + 2Fc2)/3 |
3109 reflections | (Δ/σ)max < 0.001 |
226 parameters | Δρmax = 2.89 e Å−3 |
0 restraints | Δρmin = −0.74 e Å−3 |
[Ag2(NO3)2(C18H16NP)2] | V = 3549.7 (9) Å3 |
Mr = 894.34 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 13.7678 (19) Å | µ = 1.25 mm−1 |
b = 12.7143 (17) Å | T = 110 K |
c = 20.364 (3) Å | 0.32 × 0.10 × 0.09 mm |
β = 95.251 (5)° |
Bruker APEX X8 CCD area-detector diffractometer | 3109 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2726 reflections with I > 2σ(I) |
Tmin = 0.70, Tmax = 0.89 | Rint = 0.044 |
17376 measured reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.099 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.047P)2 + 24.9163P] where P = (Fo2 + 2Fc2)/3 |
3109 reflections | Δρmax = 2.89 e Å−3 |
226 parameters | Δρmin = −0.74 e Å−3 |
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 | 0.04440 (2) | −0.01171 (2) | 0.067423 (15) | 0.02050 (13) | |
P1 | −0.08720 (8) | 0.09272 (8) | 0.10130 (5) | 0.0171 (2) | |
N1 | 0.1901 (2) | 0.0319 (3) | 0.03379 (16) | 0.0177 (7) | |
C1 | 0.1915 (3) | −0.1181 (3) | −0.04038 (18) | 0.0179 (8) | |
H1A | 0.1696 | −0.1612 | −0.0041 | 0.021* | |
H1B | 0.2414 | −0.1589 | −0.0616 | 0.021* | |
C2 | 0.2369 (3) | −0.0183 (3) | −0.01233 (19) | 0.0170 (9) | |
C3 | 0.3233 (3) | 0.0199 (3) | −0.0336 (2) | 0.0227 (9) | |
H3 | 0.3542 | −0.0157 | −0.0670 | 0.027* | |
C4 | 0.3636 (3) | 0.1110 (4) | −0.0050 (2) | 0.0280 (10) | |
H4 | 0.4228 | 0.1383 | −0.0187 | 0.034* | |
C5 | 0.3172 (3) | 0.1616 (3) | 0.0433 (2) | 0.0234 (9) | |
H5 | 0.3441 | 0.2233 | 0.0641 | 0.028* | |
C6 | 0.2310 (3) | 0.1200 (3) | 0.0604 (2) | 0.0219 (9) | |
H6 | 0.1983 | 0.1556 | 0.0930 | 0.026* | |
C7 | −0.1431 (3) | 0.0425 (3) | 0.17266 (19) | 0.0199 (9) | |
C8 | −0.1145 (3) | −0.0544 (4) | 0.1985 (2) | 0.0268 (10) | |
H8 | −0.0682 | −0.0952 | 0.1777 | 0.032* | |
C9 | −0.1528 (3) | −0.0925 (4) | 0.2546 (2) | 0.0316 (11) | |
H9 | −0.1318 | −0.1584 | 0.2726 | 0.038* | |
C10 | −0.2218 (3) | −0.0344 (4) | 0.2844 (2) | 0.0306 (11) | |
H10 | −0.2477 | −0.0601 | 0.3230 | 0.037* | |
C11 | −0.2527 (3) | 0.0612 (4) | 0.2576 (2) | 0.0284 (10) | |
H11 | −0.3010 | 0.1004 | 0.2774 | 0.034* | |
C12 | −0.2140 (3) | 0.1003 (4) | 0.2022 (2) | 0.0230 (9) | |
H12 | −0.2354 | 0.1661 | 0.1842 | 0.028* | |
C13 | −0.0448 (3) | 0.2231 (3) | 0.12690 (18) | 0.0166 (8) | |
C14 | 0.0418 (3) | 0.2276 (3) | 0.1691 (2) | 0.0225 (9) | |
H14 | 0.0736 | 0.1644 | 0.1838 | 0.027* | |
C15 | 0.0809 (3) | 0.3234 (4) | 0.1895 (2) | 0.0272 (10) | |
H15 | 0.1393 | 0.3255 | 0.2182 | 0.033* | |
C16 | 0.0364 (3) | 0.4161 (4) | 0.1687 (2) | 0.0260 (10) | |
H16 | 0.0641 | 0.4817 | 0.1826 | 0.031* | |
C17 | −0.0494 (3) | 0.4128 (3) | 0.1271 (2) | 0.0258 (10) | |
H17 | −0.0807 | 0.4765 | 0.1127 | 0.031* | |
C18 | −0.0896 (3) | 0.3170 (3) | 0.1064 (2) | 0.0234 (9) | |
H18 | −0.1482 | 0.3156 | 0.0779 | 0.028* | |
N2 | 0.0698 (3) | −0.2472 (3) | 0.0958 (2) | 0.0291 (9) | |
O1 | 0.0043 (3) | −0.1936 (3) | 0.0628 (2) | 0.0543 (12) | |
O2 | 0.1523 (2) | −0.2084 (3) | 0.10666 (15) | 0.0378 (8) | |
O3 | 0.0526 (3) | −0.3363 (3) | 0.1142 (2) | 0.0573 (12) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ag1 | 0.0186 (2) | 0.0202 (2) | 0.0234 (2) | 0.00012 (12) | 0.00551 (13) | −0.00150 (13) |
P1 | 0.0180 (5) | 0.0182 (5) | 0.0153 (5) | −0.0019 (4) | 0.0028 (4) | 0.0005 (4) |
N1 | 0.0172 (18) | 0.0183 (18) | 0.0178 (17) | −0.0016 (14) | 0.0034 (14) | 0.0005 (14) |
C1 | 0.020 (2) | 0.021 (2) | 0.0127 (19) | −0.0006 (17) | 0.0026 (16) | −0.0003 (16) |
C2 | 0.017 (2) | 0.020 (2) | 0.014 (2) | 0.0001 (16) | 0.0010 (16) | 0.0046 (16) |
C3 | 0.017 (2) | 0.034 (2) | 0.017 (2) | −0.0004 (18) | 0.0047 (17) | 0.0016 (18) |
C4 | 0.019 (2) | 0.034 (3) | 0.032 (2) | −0.0074 (19) | 0.0040 (19) | 0.005 (2) |
C5 | 0.023 (2) | 0.022 (2) | 0.024 (2) | −0.0072 (18) | −0.0028 (18) | −0.0006 (18) |
C6 | 0.024 (2) | 0.019 (2) | 0.022 (2) | 0.0002 (18) | 0.0007 (18) | 0.0003 (17) |
C7 | 0.021 (2) | 0.024 (2) | 0.015 (2) | −0.0066 (18) | −0.0007 (17) | 0.0004 (17) |
C8 | 0.026 (2) | 0.029 (2) | 0.025 (2) | 0.0004 (19) | 0.0032 (19) | 0.0058 (19) |
C9 | 0.032 (3) | 0.037 (3) | 0.025 (2) | −0.003 (2) | 0.003 (2) | 0.012 (2) |
C10 | 0.031 (3) | 0.043 (3) | 0.017 (2) | −0.015 (2) | 0.0010 (19) | 0.008 (2) |
C11 | 0.019 (2) | 0.046 (3) | 0.021 (2) | −0.006 (2) | 0.0048 (18) | −0.004 (2) |
C12 | 0.023 (2) | 0.029 (2) | 0.017 (2) | −0.0048 (18) | −0.0002 (18) | −0.0008 (18) |
C13 | 0.018 (2) | 0.017 (2) | 0.015 (2) | −0.0018 (16) | 0.0059 (16) | −0.0002 (16) |
C14 | 0.019 (2) | 0.025 (2) | 0.023 (2) | 0.0014 (17) | 0.0031 (18) | −0.0035 (18) |
C15 | 0.024 (2) | 0.034 (3) | 0.024 (2) | −0.006 (2) | 0.0004 (19) | −0.008 (2) |
C16 | 0.032 (3) | 0.025 (2) | 0.023 (2) | −0.0107 (19) | 0.011 (2) | −0.0064 (18) |
C17 | 0.035 (3) | 0.016 (2) | 0.027 (2) | −0.0011 (18) | 0.008 (2) | 0.0001 (18) |
C18 | 0.022 (2) | 0.025 (2) | 0.024 (2) | −0.0018 (18) | 0.0022 (18) | −0.0014 (18) |
N2 | 0.030 (2) | 0.017 (2) | 0.042 (2) | −0.0030 (17) | 0.0130 (18) | −0.0056 (17) |
O1 | 0.0246 (19) | 0.0224 (18) | 0.114 (4) | −0.0011 (15) | −0.001 (2) | 0.017 (2) |
O2 | 0.038 (2) | 0.049 (2) | 0.0263 (17) | −0.0196 (17) | −0.0024 (15) | 0.0013 (15) |
O3 | 0.046 (2) | 0.025 (2) | 0.099 (3) | −0.0062 (17) | −0.004 (2) | 0.017 (2) |
Ag1—N1 | 2.247 (3) | C8—C9 | 1.389 (6) |
Ag1—O1 | 2.378 (3) | C8—H8 | 0.9500 |
Ag1—P1 | 2.3980 (11) | C9—C10 | 1.386 (7) |
Ag1—Ag1i | 2.9171 (7) | C9—H9 | 0.9500 |
P1—C13 | 1.818 (4) | C10—C11 | 1.383 (7) |
P1—C7 | 1.821 (4) | C10—H10 | 0.9500 |
P1—C1i | 1.839 (4) | C11—C12 | 1.384 (6) |
N1—C6 | 1.346 (5) | C11—H11 | 0.9500 |
N1—C2 | 1.348 (5) | C12—H12 | 0.9500 |
C1—C2 | 1.504 (6) | C13—C18 | 1.391 (6) |
C1—P1i | 1.839 (4) | C13—C14 | 1.406 (6) |
C1—H1A | 0.9900 | C14—C15 | 1.380 (6) |
C1—H1B | 0.9900 | C14—H14 | 0.9500 |
C2—C3 | 1.390 (6) | C15—C16 | 1.376 (7) |
C3—C4 | 1.389 (6) | C15—H15 | 0.9500 |
C3—H3 | 0.9500 | C16—C17 | 1.390 (7) |
C4—C5 | 1.380 (6) | C16—H16 | 0.9500 |
C4—H4 | 0.9500 | C17—C18 | 1.387 (6) |
C5—C6 | 1.374 (6) | C17—H17 | 0.9500 |
C5—H5 | 0.9500 | C18—H18 | 0.9500 |
C6—H6 | 0.9500 | N2—O3 | 1.222 (5) |
C7—C8 | 1.383 (6) | N2—O2 | 1.239 (5) |
C7—C12 | 1.399 (6) | N2—O1 | 1.273 (5) |
N1—Ag1—O1 | 116.02 (13) | C12—C7—P1 | 121.4 (3) |
N1—Ag1—P1 | 132.06 (9) | C7—C8—C9 | 120.4 (4) |
O1—Ag1—P1 | 111.77 (10) | C7—C8—H8 | 119.8 |
N1—Ag1—Ag1i | 89.81 (9) | C9—C8—H8 | 119.8 |
O1—Ag1—Ag1i | 89.21 (11) | C10—C9—C8 | 120.1 (5) |
P1—Ag1—Ag1i | 87.23 (3) | C10—C9—H9 | 119.9 |
C13—P1—C7 | 103.83 (18) | C8—C9—H9 | 119.9 |
C13—P1—C1i | 104.12 (18) | C11—C10—C9 | 119.6 (4) |
C7—P1—C1i | 103.81 (19) | C11—C10—H10 | 120.2 |
C13—P1—Ag1 | 110.85 (13) | C9—C10—H10 | 120.2 |
C7—P1—Ag1 | 114.91 (15) | C10—C11—C12 | 120.7 (4) |
C1i—P1—Ag1 | 117.87 (13) | C10—C11—H11 | 119.7 |
C6—N1—C2 | 117.8 (3) | C12—C11—H11 | 119.7 |
C6—N1—Ag1 | 115.8 (3) | C11—C12—C7 | 119.8 (4) |
C2—N1—Ag1 | 126.3 (3) | C11—C12—H12 | 120.1 |
C2—C1—P1i | 112.3 (3) | C7—C12—H12 | 120.1 |
C2—C1—H1A | 109.1 | C18—C13—C14 | 118.5 (4) |
P1i—C1—H1A | 109.1 | C18—C13—P1 | 125.1 (3) |
C2—C1—H1B | 109.1 | C14—C13—P1 | 116.4 (3) |
P1i—C1—H1B | 109.1 | C15—C14—C13 | 120.4 (4) |
H1A—C1—H1B | 107.9 | C15—C14—H14 | 119.8 |
N1—C2—C3 | 121.9 (4) | C13—C14—H14 | 119.8 |
N1—C2—C1 | 117.2 (3) | C16—C15—C14 | 120.9 (4) |
C3—C2—C1 | 120.9 (4) | C16—C15—H15 | 119.6 |
C4—C3—C2 | 118.8 (4) | C14—C15—H15 | 119.6 |
C4—C3—H3 | 120.6 | C15—C16—C17 | 119.4 (4) |
C2—C3—H3 | 120.6 | C15—C16—H16 | 120.3 |
C5—C4—C3 | 119.6 (4) | C17—C16—H16 | 120.3 |
C5—C4—H4 | 120.2 | C18—C17—C16 | 120.3 (4) |
C3—C4—H4 | 120.2 | C18—C17—H17 | 119.9 |
C6—C5—C4 | 118.0 (4) | C16—C17—H17 | 119.9 |
C6—C5—H5 | 121.0 | C17—C18—C13 | 120.6 (4) |
C4—C5—H5 | 121.0 | C17—C18—H18 | 119.7 |
N1—C6—C5 | 123.9 (4) | C13—C18—H18 | 119.7 |
N1—C6—H6 | 118.1 | O3—N2—O2 | 121.0 (4) |
C5—C6—H6 | 118.1 | O3—N2—O1 | 120.6 (4) |
C8—C7—C12 | 119.3 (4) | O2—N2—O1 | 118.3 (4) |
C8—C7—P1 | 119.3 (3) | N2—O1—Ag1 | 110.4 (3) |
Symmetry code: (i) −x, −y, −z. |
Experimental details
Crystal data | |
Chemical formula | [Ag2(NO3)2(C18H16NP)2] |
Mr | 894.34 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 110 |
a, b, c (Å) | 13.7678 (19), 12.7143 (17), 20.364 (3) |
β (°) | 95.251 (5) |
V (Å3) | 3549.7 (9) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.25 |
Crystal size (mm) | 0.32 × 0.10 × 0.09 |
Data collection | |
Diffractometer | Bruker APEX X8 CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.70, 0.89 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 17376, 3109, 2726 |
Rint | 0.044 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.099, 1.03 |
No. of reflections | 3109 |
No. of parameters | 226 |
H-atom treatment | H-atom parameters constrained |
w = 1/[σ2(Fo2) + (0.047P)2 + 24.9163P] where P = (Fo2 + 2Fc2)/3 | |
Δρmax, Δρmin (e Å−3) | 2.89, −0.74 |
Computer programs: APEX2 (Bruker, 2003), APEX2, SAINT-Plus (Bruker, 2003), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Sheldrick, 2000), SHELXTL.
Ag1—N1 | 2.247 (3) | Ag1—Ag1i | 2.9171 (7) |
Ag1—P1 | 2.3980 (11) | ||
N1—Ag1—O1 | 116.02 (13) | O1—Ag1—Ag1i | 89.21 (11) |
N1—Ag1—P1 | 132.06 (9) | P1—Ag1—Ag1i | 87.23 (3) |
O1—Ag1—P1 | 111.77 (10) | C13—P1—C7 | 103.83 (18) |
N1—Ag1—Ag1i | 89.81 (9) |
Symmetry code: (i) −x, −y, −z. |
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The study of silver coordinated complexes using P,N based ligands is a well established field of research, with reports that describe the formation of a large variety of coordination modes associated with variation in the ligand/metal ratio or by changes in the solvent or counterion in charged systems (Cingolani et al., 2006; Feazell et al., 2005). The well known 2-(phosphinomethyl)pyridyl family of ligands of the type PPhxCH2py3 - x (x = 0, 1, 2) have been widely used in coordination chemistry associated with transition metals and applications in the catalysis arena, due to the geometrical flexibility and electronic properties that these phosphine ligands exhibit (Murso & Stalke, 2004; Sandee & Reek, 2006). The diphenyl(2-pyridylmethyl)phosphine is of special interest because as a bidentate ligand it can connect two identical or different metal centers, allowing for a close proximity and direct metal-metal interactions. The use of silver starting materials and these P,N based ligands have received great attention lately because of the flexible coordination sphere of the silver centers, allowing it to take different structural motifs (Klausmeyer et al., 2004). Thus, following this research line we present in this study the synthesis of a silver-based dinuclear complex, obtained by the reaction of the diphenyl(2-pyridylmethyl)phosphine ligand with silver nitrate in a 1:1 ratio.
The title compound, (I), consists of two phosphine ligands coordinated head-to-tail to two silver atoms across the Ag—Ag axis, and the nitrate anions bound to the metal centers in a unidentate fashion. Accordingly, the AgI atom in (I) is four-coordinated by one P atom, one N atom, an O atom from the nitrate anion, and a Ag atom with which the metallophilic interaction occurs. The coordination sphere of the metal centers reveal a distorted tetrahedral environment with angles ranging between 87.23 (3) and 132.1 (9)°. The flexibility of the ligand is evidenced by a twisting angle of 77.4 (4)° for P1—C1—C2—N1. The Ag—P and Ag—N distances fall in the range of reported values. The NO3 anions coordinated to the corresponding silver atoms through one of the oxygen atoms, are bounded perpendicular to the Ag—Ag bond with an angle of 89.21 (11)° for O1—Ag1—Ag1i [symmetry code: (i) -x, -y, -z].