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The title complex, poly[dodeca-μ-cyanido-diiron(III)triplat­inum(II)], [FeIII2{PtII(CN)4}3], has a three-dimensional polymeric structure. It is built-up from square-planar [PtII(CN)4]2− anions (point group symmetry 2/m) bridging cationic [FeIIIPtII(CN)4]+ layers extending in the bc plane. The FeII atoms of the layers are located on inversion centres and exhibit an octa­hedral coordination sphere defined by six N atoms of cyanide ligands, while the PtII atoms are located on twofold rotation axes and are surrounded by four C atoms of the cyanide ligands in a square-planar coordination. The geometrical preferences of the two cations for octa­hedral and square-planar coordination, respectively, lead to a corrugated organisation of the layers. The distance between neighbouring [FeIIIPtII(CN)4]+ layers corresponds to the length a/2 = 8.0070 (3) Å, and the separation between two neighbouring PtII atoms of the bridging [PtII(CN)4]2− groups corresponds to the length of the c axis [7.5720 (2) Å]. The structure is porous with accessible voids of 390 Å3 per unit cell.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S2056989014026188/wm5094sup1.cif
Contains datablock I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S2056989014026188/wm5094Isup2.hkl
Contains datablock I

cdx

Chemdraw file https://doi.org/10.1107/S2056989014026188/wm5094Isup3.cdx
Supplementary material

CCDC reference: 1036669

Key indicators

  • Single-crystal X-ray study
  • T = 293 K
  • Mean [sigma](N-C) = 0.011 Å
  • R factor = 0.038
  • wR factor = 0.106
  • Data-to-parameter ratio = 26.9

checkCIF/PLATON results

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Alert level A PLAT601_ALERT_2_A Structure Contains Solvent Accessible VOIDS of . 390 Ang3
Author Response: highly porous polycyanide complex

Alert level C PLAT029_ALERT_3_C _diffrn_measured_fraction_theta_full Low ....... 0.972 Note PLAT242_ALERT_2_C Low Ueq as Compared to Neighbors for ..... Fe Check PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 40 Report
Alert level G PLAT004_ALERT_5_G Polymeric Structure Found with Dimension ....... 2 Info PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF Please Do ! PLAT040_ALERT_1_G No H-atoms in this Carbon Containing Compound .. Please Check PLAT083_ALERT_2_G SHELXL Second Parameter in WGHT Unusually Large. 15.45 Why ? PLAT180_ALERT_4_G Check Cell Rounding: # of Values Ending with 0 = 3 PLAT199_ALERT_1_G Reported _cell_measurement_temperature ..... (K) 293 Check PLAT200_ALERT_1_G Reported _diffrn_ambient_temperature ..... (K) 293 Check PLAT794_ALERT_5_G Tentative Bond Valency for Pt1 (II) ..... 2.09 Note PLAT794_ALERT_5_G Tentative Bond Valency for Pt2 (II) ..... 2.17 Note PLAT794_ALERT_5_G Tentative Bond Valency for Fe (II) ..... 2.08 Note PLAT899_ALERT_4_G SHELXL97 is Deprecated and Succeeded by SHELXL 2014 Note PLAT910_ALERT_3_G Missing # of FCF Reflections Below Th(Min) ..... 3 Report PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L= 0.600 11 Note
1 ALERT level A = Most likely a serious problem - resolve or explain 0 ALERT level B = A potentially serious problem, consider carefully 3 ALERT level C = Check. Ensure it is not caused by an omission or oversight 13 ALERT level G = General information/check it is not something unexpected 3 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 3 ALERT type 3 Indicator that the structure quality may be low 3 ALERT type 4 Improvement, methodology, query or suggestion 5 ALERT type 5 Informative message, check

Synthesis and crystallization top

Single crystals of the title compound were grown using a slow diffusion technique. During the reaction time a side product had formed serendipitously due to oxidation of the initial FeII salt. One side of a multi-arm shaped vessel contained (NH4)2Fe(SO4)2·6H2O (20 mg, 51 mmol) dissolved in water (0.5 mL). The second arm contained K2[Pt(CN)4]·3H2O (22 mg, 51 mmol) in water (0.5 ml). The vessel was filled with a water/methanol (1:1) solution. Square shaped orange crystals suitable for single crystal X-ray analysis were obtained after several weeks.

Refinement top

The highest and lowest remaining electron density are located 3.66 and 0.83 Å, respectively, from the Pt atom. The highest electron densities are connected with positions in the voids of the framework. However, modelling of the electron density e.g. under consideration of disordered (partially occupied) water molecules lead to implausible models.

Related literature top

Coordination compounds have interesting properties in catalysis (Kanderal et al., 2005; Penkova et al., 2009) or as photoactive materials (Yan et al., 2012). Magnetically active polycyanidometallate network complexes of FeII [FeIIL2{MI(CN)2}2] or [FeIIL2{MII(CN)4}] (MI = Ag, Au; MII = Ni, Pd, Pt; L = N-heterocyclic ligand) have been studied because they show versatile polymeric structures (Piñeiro-López et al. 2014; Seredyuk et al., 2007, 2009), spin transition (Muñoz & Real, 2013) and functionalities such as sorption–desorption of organic and inorganic molecules (Muñoz & Real, 2013) or reversible chemosorption (Arcís-Castillo et al., 2013).

Structure description top

Coordination compounds have interesting properties in catalysis (Kanderal et al., 2005; Penkova et al., 2009) or as photoactive materials (Yan et al., 2012). Magnetically active polycyanidometallate network complexes of FeII [FeIIL2{MI(CN)2}2] or [FeIIL2{MII(CN)4}] (MI = Ag, Au; MII = Ni, Pd, Pt; L = N-heterocyclic ligand) have been studied because they show versatile polymeric structures (Piñeiro-López et al. 2014; Seredyuk et al., 2007, 2009), spin transition (Muñoz & Real, 2013) and functionalities such as sorption–desorption of organic and inorganic molecules (Muñoz & Real, 2013) or reversible chemosorption (Arcís-Castillo et al., 2013).

Synthesis and crystallization top

Single crystals of the title compound were grown using a slow diffusion technique. During the reaction time a side product had formed serendipitously due to oxidation of the initial FeII salt. One side of a multi-arm shaped vessel contained (NH4)2Fe(SO4)2·6H2O (20 mg, 51 mmol) dissolved in water (0.5 mL). The second arm contained K2[Pt(CN)4]·3H2O (22 mg, 51 mmol) in water (0.5 ml). The vessel was filled with a water/methanol (1:1) solution. Square shaped orange crystals suitable for single crystal X-ray analysis were obtained after several weeks.

Refinement details top

The highest and lowest remaining electron density are located 3.66 and 0.83 Å, respectively, from the Pt atom. The highest electron densities are connected with positions in the voids of the framework. However, modelling of the electron density e.g. under consideration of disordered (partially occupied) water molecules lead to implausible models.

Computing details top

Data collection: COLLECT (Nonius, 1999); cell refinement: SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO and SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: WinGX (Farrugia, 2012).

Figures top
[Figure 1] Fig. 1. Displacement ellipsoid plot (30% probability level) of the principal building units of the structure of the title compound. [Symmetry codes: (i) 1/2 + x, 1/2 + y, 1 + z; (ii) 0.5 – x, 1/2 + y, 1 – z, (iii) x, 1 – y, 1 + z.]
[Figure 2] Fig. 2. A fragment of three-dimentional coordination polymer of the title compound in a perspective view along c. Polyhedra correspond to FeN6 and PtC4 chromophores.
Poly[dodeca-µ-cyanido-diiron(III)triplatinum(II)] top
Crystal data top
[Fe2Pt3(CN)12]F(000) = 884
Mr = 1009.18Dx = 2.051 Mg m3
Monoclinic, C2/mMo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2yCell parameters from 200 reflections
a = 16.0140 (5) Åθ = 12–20°
b = 13.8250 (5) ŵ = 13.68 mm1
c = 7.5720 (2) ÅT = 293 K
β = 102.946 (2)°Prismatic, orange
V = 1633.78 (9) Å30.04 × 0.04 × 0.02 mm
Z = 2
Data collection top
Oxford Diffraction Gemini S Ultra
diffractometer
1909 independent reflections
Radiation source: fine-focus sealed tube1568 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.038
ω scansθmax = 27.5°, θmin = 3.0°
Absorption correction: multi-scan
(Blessing, 1995)
h = 2020
Tmin = 0.611, Tmax = 0.772k = 1716
3358 measured reflectionsl = 99
Refinement top
Refinement on F20 constraints
Least-squares matrix: fullPrimary atom site location: structure-invariant direct methods
R[F2 > 2σ(F2)] = 0.038Secondary atom site location: difference Fourier map
wR(F2) = 0.106 w = 1/[σ2(Fo2) + (0.0615P)2 + 15.455P]
where P = (Fo2 + 2Fc2)/3
S = 0.97(Δ/σ)max < 0.001
1909 reflectionsΔρmax = 1.25 e Å3
71 parametersΔρmin = 1.33 e Å3
0 restraints
Crystal data top
[Fe2Pt3(CN)12]V = 1633.78 (9) Å3
Mr = 1009.18Z = 2
Monoclinic, C2/mMo Kα radiation
a = 16.0140 (5) ŵ = 13.68 mm1
b = 13.8250 (5) ÅT = 293 K
c = 7.5720 (2) Å0.04 × 0.04 × 0.02 mm
β = 102.946 (2)°
Data collection top
Oxford Diffraction Gemini S Ultra
diffractometer
1909 independent reflections
Absorption correction: multi-scan
(Blessing, 1995)
1568 reflections with I > 2σ(I)
Tmin = 0.611, Tmax = 0.772Rint = 0.038
3358 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0380 restraints
wR(F2) = 0.106 w = 1/[σ2(Fo2) + (0.0615P)2 + 15.455P]
where P = (Fo2 + 2Fc2)/3
S = 0.97Δρmax = 1.25 e Å3
1909 reflectionsΔρmin = 1.33 e Å3
71 parameters
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
xyzUiso*/Ueq
Pt10.00000.00000.00000.02376 (17)
Pt20.19452 (3)0.50000.47749 (5)0.02524 (16)
Fe0.25000.25000.00000.0215 (3)
N10.1335 (5)0.1622 (5)0.0284 (10)0.0368 (17)
N20.2081 (6)0.3449 (5)0.1843 (10)0.0400 (18)
N30.3039 (6)0.1577 (5)0.2273 (10)0.0385 (17)
C10.0859 (5)0.1023 (6)0.0190 (12)0.0310 (17)
C20.2001 (6)0.4002 (6)0.2915 (11)0.0335 (19)
C30.3072 (6)0.1012 (6)0.3373 (10)0.0312 (18)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Pt10.0208 (3)0.0167 (3)0.0343 (3)0.0000.0073 (2)0.000
Pt20.0389 (3)0.0182 (2)0.0195 (2)0.0000.00824 (18)0.000
Fe0.0294 (8)0.0165 (7)0.0199 (7)0.0040 (6)0.0083 (6)0.0004 (5)
N10.041 (4)0.026 (4)0.042 (4)0.009 (3)0.008 (4)0.002 (3)
N20.056 (5)0.030 (4)0.038 (4)0.004 (4)0.017 (4)0.006 (3)
N30.053 (5)0.026 (4)0.037 (4)0.002 (4)0.011 (4)0.006 (3)
C10.028 (4)0.023 (4)0.043 (4)0.000 (3)0.011 (4)0.004 (3)
C20.050 (6)0.026 (4)0.026 (4)0.003 (4)0.012 (4)0.001 (3)
C30.045 (5)0.021 (4)0.025 (4)0.001 (4)0.004 (4)0.000 (3)
Geometric parameters (Å, º) top
Pt1—C12.000 (8)Fe—N22.130 (7)
Pt1—C1i2.000 (8)Fe—N3vii2.161 (7)
Pt1—C1ii2.000 (8)Fe—N32.161 (7)
Pt1—C1iii2.000 (8)Fe—N1vii2.195 (7)
Pt2—C3iv1.986 (8)Fe—N12.195 (7)
Pt2—C3v1.986 (8)N1—C11.139 (10)
Pt2—C21.988 (8)N2—C21.143 (11)
Pt2—C2vi1.988 (8)N3—C31.134 (10)
Fe—N2vii2.130 (7)C3—Pt2v1.986 (8)
C1—Pt1—C1i90.0 (5)N3vii—Fe—N3180.0 (3)
C1—Pt1—C1ii180.0 (6)N2vii—Fe—N1vii91.1 (3)
C1i—Pt1—C1ii90.0 (5)N2—Fe—N1vii88.9 (3)
C1—Pt1—C1iii90.0 (5)N3vii—Fe—N1vii86.0 (3)
C1i—Pt1—C1iii180.0 (6)N3—Fe—N1vii94.0 (3)
C1ii—Pt1—C1iii90.0 (5)N2vii—Fe—N188.9 (3)
C3iv—Pt2—C3v89.6 (4)N2—Fe—N191.1 (3)
C3iv—Pt2—C2178.1 (4)N3vii—Fe—N194.0 (3)
C3v—Pt2—C291.2 (3)N3—Fe—N186.0 (3)
C3iv—Pt2—C2vi91.2 (3)N1vii—Fe—N1180.0 (2)
C3v—Pt2—C2vi178.1 (4)C1—N1—Fe164.2 (7)
C2—Pt2—C2vi87.9 (5)C2—N2—Fe168.3 (8)
N2vii—Fe—N2180.0 (5)C3—N3—Fe159.4 (8)
N2vii—Fe—N3vii88.3 (3)N1—C1—Pt1178.3 (7)
N2—Fe—N3vii91.7 (3)N2—C2—Pt2175.9 (9)
N2vii—Fe—N391.7 (3)N3—C3—Pt2v176.4 (8)
N2—Fe—N388.3 (3)
Symmetry codes: (i) x, y, z; (ii) x, y, z; (iii) x, y, z; (iv) x+1/2, y+1/2, z+1; (v) x+1/2, y+1/2, z+1; (vi) x, y+1, z; (vii) x+1/2, y+1/2, z.

Experimental details

Crystal data
Chemical formula[Fe2Pt3(CN)12]
Mr1009.18
Crystal system, space groupMonoclinic, C2/m
Temperature (K)293
a, b, c (Å)16.0140 (5), 13.8250 (5), 7.5720 (2)
β (°) 102.946 (2)
V3)1633.78 (9)
Z2
Radiation typeMo Kα
µ (mm1)13.68
Crystal size (mm)0.04 × 0.04 × 0.02
Data collection
DiffractometerOxford Diffraction Gemini S Ultra
Absorption correctionMulti-scan
(Blessing, 1995)
Tmin, Tmax0.611, 0.772
No. of measured, independent and
observed [I > 2σ(I)] reflections
3358, 1909, 1568
Rint0.038
(sin θ/λ)max1)0.650
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.038, 0.106, 0.97
No. of reflections1909
No. of parameters71
w = 1/[σ2(Fo2) + (0.0615P)2 + 15.455P]
where P = (Fo2 + 2Fc2)/3
Δρmax, Δρmin (e Å3)1.25, 1.33

Computer programs: COLLECT (Nonius, 1999), DENZO and SCALEPACK (Otwinowski & Minor, 1997), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), DIAMOND (Brandenburg, 1999), WinGX (Farrugia, 2012).

 

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