In the title compound, [Ag(NH
3)
2]
2[Pt(C
2O
4)
2], the Ag atom is coordinated in an almost linear configuration by two N atoms from two ammine ligands. The Pt atom, located on an inversion centre, is tetracoordinated by four O atoms from two oxalate ions. The silver cations and platinum-centred anions are each stacked separately in a columnar fashion along the
a axis. In the crystal structure, the cations and anions are further linked together through N—H
O hydrogen bonds, forming a three-dimensional structure.
Supporting information
CCDC reference: 608479
Key indicators
- Single-crystal X-ray study
- T = 120 K
- Mean (C-C) = 0.008 Å
- R factor = 0.024
- wR factor = 0.062
- Data-to-parameter ratio = 12.5
checkCIF/PLATON results
No syntax errors found
Alert level C
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ .... ?
PLAT062_ALERT_4_C Rescale T(min) & T(max) by ..................... 0.74
PLAT369_ALERT_2_C Long C(sp2)-C(sp2) Bond C1 - C2_a ... 1.54 Ang.
Alert level G
ABSTM02_ALERT_3_G When printed, the submitted absorption T values will be
replaced by the scaled T values. Since the ratio of scaled T's
is identical to the ratio of reported T values, the scaling
does not imply a change to the absorption corrections used in
the study.
Ratio of Tmax expected/reported 0.740
Tmax scaled 0.250 Tmin scaled 0.061
0 ALERT level A = In general: serious problem
0 ALERT level B = Potentially serious problem
3 ALERT level C = Check and explain
1 ALERT level G = General alerts; check
1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
1 ALERT type 2 Indicator that the structure model may be wrong or deficient
1 ALERT type 3 Indicator that the structure quality may be low
1 ALERT type 4 Improvement, methodology, query or suggestion
Data collection: SMART (Bruker, 1998); cell refinement: SMART; data reduction: SAINT (Bruker, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXTL.
Bis[diamminesilver(I)] dioxalatoplatinate(II)
top
Crystal data top
[Ag(NH3)2]2·[Pt(C2O4)2] | F(000) = 600 |
Mr = 655.01 | Dx = 3.376 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 929 reflections |
a = 3.5857 (11) Å | θ = 2.2–19.9° |
b = 9.014 (3) Å | µ = 13.88 mm−1 |
c = 19.936 (6) Å | T = 120 K |
β = 90.284 (5)° | Needle, yellow |
V = 644.4 (4) Å3 | 0.36 × 0.12 × 0.10 mm |
Z = 2 | |
Data collection top
Bruker SMART CCD area-detector diffractometer | 1135 independent reflections |
Radiation source: fine-focus sealed tube | 1082 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.050 |
φ and ω scans | θmax = 25.0°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −4→4 |
Tmin = 0.082, Tmax = 0.338 | k = −10→10 |
3232 measured reflections | l = −23→18 |
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)] = 0.024 | H-atom parameters constrained |
wR(F2) = 0.062 | w = 1/[σ2(Fo2) + (0.0351P)2 + 1.6017P] where P = (Fo2 + 2Fc2)/3 |
S = 1.09 | (Δ/σ)max = 0.001 |
1135 reflections | Δρmax = 1.83 e Å−3 |
91 parameters | Δρmin = −1.02 e Å−3 |
0 restraints | Extinction correction: SHELXL97, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0040 (5) |
Special details top
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
Ag | 0.83142 (12) | 0.76654 (5) | 0.83595 (2) | 0.02382 (18) | |
C1 | −0.0717 (15) | 0.2574 (6) | 0.4141 (3) | 0.0194 (12) | |
C2 | 0.1832 (14) | 0.6057 (6) | 0.6279 (3) | 0.0169 (11) | |
N1 | 0.6835 (13) | 0.8792 (5) | 0.7464 (2) | 0.0237 (10) | |
H1A | 0.5244 | 0.8219 | 0.7219 | 0.036* | |
H1B | 0.8924 | 0.8977 | 0.7221 | 0.036* | |
H1C | 0.5700 | 0.9665 | 0.7568 | 0.036* | |
N2 | 0.9357 (13) | 0.6307 (6) | 0.9208 (2) | 0.0283 (11) | |
H2A | 0.7247 | 0.6236 | 0.9458 | 0.042* | |
H2B | 1.1213 | 0.6715 | 0.9461 | 0.042* | |
H2C | 1.0059 | 0.5386 | 0.9070 | 0.042* | |
O1 | 0.0473 (11) | 0.2850 (4) | 0.4745 (2) | 0.0205 (8) | |
O2 | −0.0907 (11) | 0.1328 (4) | 0.38936 (19) | 0.0243 (9) | |
O3 | 0.1518 (12) | 0.4792 (4) | 0.5971 (2) | 0.0192 (9) | |
O4 | 0.2910 (11) | 0.6198 (4) | 0.68547 (18) | 0.0234 (9) | |
Pt | 0.0000 | 0.5000 | 0.5000 | 0.01440 (16) | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
Ag | 0.0280 (3) | 0.0201 (3) | 0.0233 (3) | −0.00046 (18) | 0.00222 (18) | −0.00245 (16) |
C1 | 0.022 (3) | 0.016 (3) | 0.020 (3) | −0.001 (2) | 0.001 (2) | 0.002 (2) |
C2 | 0.016 (2) | 0.016 (3) | 0.019 (3) | −0.001 (2) | 0.002 (2) | 0.002 (2) |
N1 | 0.021 (2) | 0.030 (3) | 0.021 (2) | −0.001 (2) | 0.0002 (19) | −0.001 (2) |
N2 | 0.022 (2) | 0.033 (3) | 0.029 (3) | −0.001 (2) | 0.003 (2) | 0.005 (2) |
O1 | 0.030 (2) | 0.0125 (19) | 0.019 (2) | 0.0019 (16) | −0.0058 (15) | −0.0002 (15) |
O2 | 0.035 (2) | 0.017 (2) | 0.021 (2) | 0.0025 (17) | −0.0017 (17) | −0.0022 (16) |
O3 | 0.027 (2) | 0.0134 (19) | 0.017 (2) | 0.0015 (15) | −0.0009 (17) | 0.0027 (14) |
O4 | 0.030 (2) | 0.021 (2) | 0.019 (2) | −0.0001 (17) | −0.0058 (16) | 0.0002 (15) |
Pt | 0.0180 (2) | 0.0122 (2) | 0.0130 (2) | −0.00024 (9) | 0.00120 (12) | 0.00097 (9) |
Geometric parameters (Å, º) top
Ag—N1 | 2.119 (5) | N1—H1B | 0.9100 |
Ag—N2 | 2.121 (5) | N1—H1C | 0.9100 |
C1—O2 | 1.228 (7) | N2—H2A | 0.9100 |
C1—O1 | 1.300 (7) | N2—H2B | 0.9100 |
C1—C2i | 1.543 (7) | N2—H2C | 0.9100 |
C2—O4 | 1.215 (7) | O1—Pt | 2.011 (4) |
C2—O3 | 1.301 (7) | O3—Pt | 2.017 (4) |
C2—C1i | 1.543 (7) | Pt—O1i | 2.011 (4) |
N1—H1A | 0.9100 | Pt—O3i | 2.017 (4) |
| | | |
N1—Ag—N2 | 172.5 (2) | Ag—N2—H2B | 109.5 |
O2—C1—O1 | 124.3 (5) | H2A—N2—H2B | 109.5 |
O2—C1—C2i | 120.0 (5) | Ag—N2—H2C | 109.5 |
O1—C1—C2i | 115.6 (4) | H2A—N2—H2C | 109.5 |
O4—C2—O3 | 124.4 (5) | H2B—N2—H2C | 109.5 |
O4—C2—C1i | 120.6 (5) | C1—O1—Pt | 113.0 (3) |
O3—C2—C1i | 115.0 (5) | C2—O3—Pt | 113.2 (3) |
Ag—N1—H1A | 109.5 | O1—Pt—O1i | 180.0 |
Ag—N1—H1B | 109.5 | O1—Pt—O3 | 97.47 (15) |
H1A—N1—H1B | 109.5 | O1i—Pt—O3 | 82.53 (15) |
Ag—N1—H1C | 109.5 | O1—Pt—O3i | 82.53 (15) |
H1A—N1—H1C | 109.5 | O1i—Pt—O3i | 97.47 (15) |
H1B—N1—H1C | 109.5 | O3—Pt—O3i | 180.0 |
Ag—N2—H2A | 109.5 | | |
| | | |
O2—C1—O1—Pt | −175.4 (5) | C1—O1—Pt—O3 | 173.3 (4) |
C2i—C1—O1—Pt | 6.2 (6) | C1—O1—Pt—O3i | −6.7 (4) |
O4—C2—O3—Pt | −175.8 (4) | C2—O3—Pt—O1 | 174.1 (4) |
C1i—C2—O3—Pt | 4.2 (6) | C2—O3—Pt—O1i | −5.9 (4) |
Symmetry code: (i) −x, −y+1, −z+1. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2C···O2ii | 0.91 | 2.15 | 2.988 (7) | 153 |
N2—H2B···O1iii | 0.91 | 2.22 | 3.112 (6) | 165 |
N2—H2A···O1iv | 0.91 | 2.37 | 3.053 (7) | 132 |
N1—H1C···O4iv | 0.91 | 2.22 | 3.077 (6) | 157 |
N1—H1B···O2v | 0.91 | 2.35 | 3.084 (6) | 137 |
N1—H1A···O4 | 0.91 | 2.13 | 2.985 (6) | 156 |
Symmetry codes: (ii) x+3/2, −y+1/2, z+1/2; (iii) −x+3/2, y+1/2, −z+3/2; (iv) −x+1/2, y+1/2, −z+3/2; (v) −x+1, −y+1, −z+1. |