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Acta Cryst. (2008). E64, m1582    [ doi:10.1107/S1600536808038257 ]

[O-Ethyl N-(4-nitrophenyl)thiocarbamato-[kappa]S](tri-p-tolylphosphine-[kappa]P)gold(I)

G. A. Broker and E. R. T. Tiekink

Abstract top

A nearly linear coordination geometry for Au is found in the title compound, [Au(C9H9N2O3S)(C21H21P)]. The thiocarbamate ligand is orientated so that the aryl group is in close proximity to the Au atom, consistent with an Au...[pi] contact [Au...Cg = 3.351 (5) Å; Cg is the centroid of the aromatic ring].

Comment top

Phosphinegold(I) thiocarbamides uniformly adopt linear coordination geometries defined by a S and P donor set (Ho et al., 2006; Ho & Tiekink, 2007; Kuan et al., 2008). In these structures the thiocarbamide-O atom is normally located in close proximity to the Au atom but in cases where the donor ability of the phosphine ligand is increased, as in the structure of the title compound (I), a rotation about the S—C bond occurs and the N-bound aryl group is orientated towards the Au centre (Kuan et al., 2008). In (I), Fig. 1, such a rotation has occurred so that the Au···Cg distance is 3.351 (5) Å. Interestingly, in the O-methyl derivative, the thiocarbamide molecule is situated to allow for an intramolecular Au···O contact (Kuan et al., 2008) suggesting that replacing methyl with a more electronegative ethyl group is sufficient to introduce a difference in the orientation of the molecule.

Related literature top

For related structures and discussion of structural diversity, see: Ho et al. (2006); Ho & Tiekink (2007); Kuan et al. (2008).

Experimental top

The title compound (I) was prepared following established literature procedures (Ho et al., 2006). Yellow crystals were obtained by the slow evaporation of an acetone solution of (I).

Refinement top

The H atoms were geometrically placed (C—H = 0.95–0.99 Å) and refined as riding with Uiso(H) = 1.2Ueq(C) or 1.5Ueq(methyl C). The largest peak was 1.46 Å from Au and the deepest hole was 1.02 Å from Au.

Computing details top

Data collection: CrystalClear (Rigaku/MSC, 2005); cell refinement: CrystalClear (Rigaku/MSC, 2005); data reduction: CrystalClear (Rigaku/MSC, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPII (Johnson, 1976); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. Molecular structure of (I) showing atom-labelling scheme and displacement ellipsoids at the 50% probability level.
[O-Ethyl N-(4-nitrophenyl)thiocarbamato-κS](tri-p- tolylphosphine-κP)gold(I) top
Crystal data top
[Au(C9H9N2O3S)(C21H21P)]F(000) = 1432
Mr = 726.56Dx = 1.704 Mg m−3
Monoclinic, CcMo Kα radiation, λ = 0.71070 Å
Hall symbol: C -2ycCell parameters from 6817 reflections
a = 16.622 (3) Åθ = 2.4–30.4°
b = 18.307 (4) ŵ = 5.36 mm−1
c = 10.094 (2) ÅT = 173 K
β = 112.78 (3)°Prism, yellow
V = 2832.0 (10) Å30.15 × 0.12 × 0.05 mm
Z = 4
Data collection top
Rigaku AFC12K/SATURN724
diffractometer		4917 independent reflections
Radiation source: fine-focus sealed tube4682 reflections with I > 2σ(I)
graphiteRint = 0.059
ω scansθmax = 26.5°, θmin = 2.4°
Absorption correction: multi-scan
(ABSCOR; Higashi, 1995)		h = −20→20
Tmin = 0.739, Tmax = 1.000k = −22→22
9217 measured reflectionsl = −12→10
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.048H-atom parameters constrained
wR(F2) = 0.099 w = 1/[σ2(Fo2) + (0.0306P)2 + 5.5648P]
where P = (Fo2 + 2Fc2)/3
S = 1.06(Δ/σ)max < 0.001
4917 reflectionsΔρmax = 1.37 e Å−3
346 parametersΔρmin = −2.40 e Å−3
2 restraintsAbsolute structure: Flack (1983), 1980 Friedel pairs
Primary atom site location: structure-invariant direct methodsFlack parameter: 0.008 (11)
Crystal data top
[Au(C9H9N2O3S)(C21H21P)]V = 2832.0 (10) Å3
Mr = 726.56Z = 4
Monoclinic, CcMo Kα radiation
a = 16.622 (3) ŵ = 5.36 mm−1
b = 18.307 (4) ÅT = 173 K
c = 10.094 (2) Å0.15 × 0.12 × 0.05 mm
β = 112.78 (3)°
Data collection top
Rigaku AFC12K/SATURN724
diffractometer		4682 reflections with I > 2σ(I)
Absorption correction: multi-scan
(ABSCOR; Higashi, 1995)		Rint = 0.059
Tmin = 0.739, Tmax = 1.000θmax = 26.5°
9217 measured reflectionsStandard reflections: 0
4917 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.048H-atom parameters constrained
wR(F2) = 0.099Δρmax = 1.37 e Å−3
S = 1.06Δρmin = −2.40 e Å−3
4917 reflectionsAbsolute structure: Flack (1983), 1980 Friedel pairs
346 parametersFlack parameter: 0.008 (11)
2 restraints
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
Au0.49939 (4)0.473591 (16)0.74925 (5)0.03122 (11)
S10.59961 (18)0.56583 (13)0.8436 (3)0.0367 (6)
P10.39053 (16)0.39085 (13)0.6519 (3)0.0270 (5)
O10.7581 (5)0.5885 (4)0.8868 (7)0.0355 (16)
O20.5347 (7)0.2127 (6)1.0596 (12)0.055 (3)
O30.5424 (7)0.1666 (5)0.8655 (11)0.074 (3)
N10.7339 (6)0.4654 (4)0.8938 (9)0.032 (2)
N20.5563 (7)0.2152 (6)0.9524 (12)0.049 (3)
C10.6860 (6)0.4052 (5)0.9059 (12)0.030 (2)
C20.6591 (6)0.3981 (6)1.0185 (11)0.031 (2)
H2A0.66930.43711.08510.037*
C30.6179 (7)0.3364 (6)1.0369 (11)0.035 (2)
H3A0.60120.33171.11660.042*
C40.6014 (7)0.2813 (6)0.9367 (12)0.031 (2)
C50.6258 (7)0.2864 (6)0.8200 (12)0.037 (2)
H5A0.61410.24790.75210.044*
C60.6674 (7)0.3490 (6)0.8060 (11)0.035 (2)
H6A0.68390.35400.72620.042*
C70.7041 (7)0.5312 (5)0.8757 (11)0.031 (2)
C80.8498 (7)0.5729 (7)0.9210 (12)0.046 (3)
H8A0.86850.53230.99130.055*
H8B0.88490.61650.96650.055*
C90.8674 (9)0.5524 (8)0.7904 (14)0.052 (3)
H9A0.92980.54230.81880.079*
H9B0.85040.59290.72140.079*
H9C0.83370.50880.74580.079*
C100.2983 (7)0.4272 (5)0.5037 (11)0.029 (2)
C110.2704 (7)0.4981 (6)0.5072 (13)0.041 (3)
H11A0.30010.52740.58950.050*
C120.2010 (8)0.5276 (5)0.3950 (13)0.042 (3)
H12A0.18270.57600.40290.050*
C130.1572 (8)0.4879 (7)0.2704 (12)0.038 (3)
C140.1839 (9)0.4159 (6)0.2679 (12)0.050 (3)
H14A0.15250.38600.18760.060*
C150.2548 (9)0.3868 (6)0.3790 (13)0.053 (3)
H15A0.27420.33890.37050.063*
C160.0830 (10)0.5201 (7)0.1453 (14)0.059 (4)
H16A0.08250.49910.05560.088*
H16B0.09020.57310.14410.088*
H16C0.02770.50880.15450.088*
C170.3478 (6)0.3540 (5)0.7770 (10)0.028 (2)
C180.2710 (7)0.3149 (6)0.7351 (11)0.038 (2)
H18A0.23560.31050.63570.045*
C190.2448 (7)0.2826 (6)0.8332 (12)0.038 (2)
H19A0.19130.25650.80080.045*
C200.2947 (8)0.2870 (6)0.9794 (11)0.039 (3)
C210.3698 (7)0.3280 (6)1.0242 (11)0.036 (2)
H21A0.40370.33291.12410.043*
C220.3968 (6)0.3624 (6)0.9264 (11)0.037 (2)
H22A0.44810.39150.95930.044*
C230.2631 (9)0.2489 (7)1.0866 (13)0.054 (3)
H23A0.31210.24381.17960.081*
H23B0.24020.20041.05000.081*
H23C0.21700.27821.09850.081*
C240.4231 (6)0.3135 (5)0.5721 (10)0.025 (2)
C250.4745 (7)0.3277 (6)0.4931 (11)0.037 (2)
H25A0.49530.37580.49000.044*
C260.4948 (7)0.2714 (6)0.4193 (11)0.036 (2)
H26A0.52850.28180.36420.043*
C270.4667 (10)0.1993 (7)0.4240 (15)0.041 (3)
C280.4187 (8)0.1867 (7)0.5063 (14)0.044 (3)
H28A0.40020.13830.51290.053*
C290.3960 (7)0.2420 (6)0.5805 (12)0.036 (2)
H29A0.36260.23130.63600.043*
C300.4884 (10)0.1410 (7)0.3408 (14)0.058 (3)
H30A0.45590.09650.34200.087*
H30B0.55110.13080.38420.087*
H30C0.47250.15720.24130.087*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Au0.03049 (18)0.03164 (17)0.03174 (19)−0.0017 (2)0.01226 (14)0.0001 (2)
S10.0368 (14)0.0270 (11)0.0499 (16)−0.0055 (11)0.0207 (13)−0.0056 (11)
P10.0262 (13)0.0295 (12)0.0239 (13)−0.0029 (10)0.0083 (11)0.0002 (10)
O10.036 (4)0.036 (4)0.035 (4)−0.005 (3)0.015 (3)0.000 (3)
O20.059 (7)0.052 (6)0.061 (7)−0.001 (5)0.032 (6)0.022 (5)
O30.091 (8)0.051 (5)0.070 (7)−0.019 (6)0.021 (6)0.001 (5)
N10.030 (5)0.031 (4)0.030 (5)−0.007 (4)0.006 (4)−0.007 (4)
N20.037 (6)0.047 (6)0.042 (7)−0.006 (5)−0.007 (5)0.008 (5)
C10.029 (5)0.028 (5)0.032 (6)0.007 (4)0.011 (5)0.004 (4)
C20.029 (6)0.033 (5)0.030 (6)0.003 (4)0.012 (5)0.003 (4)
C30.033 (6)0.048 (6)0.022 (5)0.009 (5)0.008 (5)0.010 (5)
C40.021 (5)0.035 (6)0.035 (6)0.001 (5)0.009 (5)0.004 (5)
C50.033 (6)0.032 (5)0.047 (7)−0.010 (5)0.018 (5)−0.013 (5)
C60.044 (6)0.040 (6)0.027 (6)0.003 (5)0.019 (5)−0.002 (5)
C70.033 (6)0.035 (5)0.025 (5)−0.018 (4)0.012 (5)−0.001 (4)
C80.036 (6)0.060 (7)0.036 (6)−0.020 (6)0.008 (5)−0.002 (5)
C90.049 (8)0.056 (8)0.049 (8)−0.011 (7)0.015 (7)−0.002 (7)
C100.034 (6)0.027 (5)0.029 (6)0.000 (4)0.017 (5)0.002 (4)
C110.042 (7)0.030 (5)0.046 (7)0.002 (5)0.010 (6)−0.002 (5)
C120.049 (7)0.024 (5)0.042 (7)0.003 (5)0.006 (6)−0.003 (4)
C130.036 (6)0.046 (6)0.031 (6)0.007 (5)0.013 (5)0.011 (5)
C140.068 (9)0.041 (6)0.026 (6)0.016 (6)0.001 (6)−0.006 (5)
C150.067 (9)0.028 (5)0.049 (7)0.007 (6)0.008 (7)−0.008 (5)
C160.077 (10)0.050 (7)0.046 (8)0.028 (7)0.021 (8)0.009 (6)
C170.030 (5)0.039 (5)0.021 (5)0.007 (4)0.016 (5)0.010 (4)
C180.033 (6)0.052 (6)0.025 (5)−0.008 (5)0.009 (5)−0.001 (5)
C190.031 (6)0.043 (6)0.038 (6)−0.006 (5)0.012 (5)0.005 (5)
C200.052 (7)0.041 (6)0.024 (6)−0.003 (5)0.014 (5)−0.001 (5)
C210.040 (6)0.036 (5)0.032 (6)0.009 (5)0.013 (5)−0.004 (4)
C220.024 (5)0.051 (6)0.033 (6)0.002 (5)0.009 (5)0.000 (5)
C230.068 (9)0.059 (8)0.043 (7)0.006 (7)0.032 (7)0.014 (6)
C240.019 (5)0.029 (5)0.024 (5)−0.005 (4)0.004 (4)0.005 (4)
C250.038 (6)0.036 (5)0.044 (6)−0.006 (5)0.025 (6)0.006 (5)
C260.044 (6)0.039 (6)0.036 (6)0.005 (5)0.029 (5)0.002 (5)
C270.047 (8)0.035 (6)0.039 (8)0.013 (6)0.015 (7)0.008 (5)
C280.049 (8)0.048 (7)0.044 (8)0.005 (6)0.025 (7)0.002 (6)
C290.036 (6)0.036 (6)0.037 (6)−0.001 (5)0.015 (5)0.005 (5)
C300.080 (10)0.049 (7)0.051 (8)0.010 (7)0.032 (8)−0.003 (6)
Geometric parameters (Å, °) top
Au—P12.271 (3)C13—C161.502 (17)
Au—S12.303 (3)C14—C151.380 (17)
S1—C71.757 (11)C14—H14A0.9500
P1—C171.801 (9)C15—H15A0.9500
P1—C101.804 (11)C16—H16A0.9800
P1—C241.813 (10)C16—H16B0.9800
O1—C71.358 (11)C16—H16C0.9800
O1—C81.454 (13)C17—C181.380 (14)
O2—N21.266 (15)C17—C221.417 (14)
O3—N21.207 (14)C18—C191.361 (13)
N1—C71.287 (12)C18—H18A0.9500
N1—C11.392 (12)C19—C201.388 (15)
N2—C41.464 (15)C19—H19A0.9500
C1—C21.380 (13)C20—C211.375 (16)
C1—C61.389 (14)C20—C231.540 (14)
C2—C31.371 (15)C21—C221.384 (14)
C2—H2A0.9500C21—H21A0.9500
C3—C41.378 (16)C22—H22A0.9500
C3—H3A0.9500C23—H23A0.9800
C4—C51.390 (14)C23—H23B0.9800
C5—C61.374 (14)C23—H23C0.9800
C5—H5A0.9500C24—C291.397 (13)
C6—H6A0.9500C24—C251.400 (12)
C8—C91.505 (16)C25—C261.388 (14)
C8—H8A0.9900C25—H25A0.9500
C8—H8B0.9900C26—C271.407 (17)
C9—H9A0.9800C26—H26A0.9500
C9—H9B0.9800C27—C281.376 (18)
C9—H9C0.9800C27—C301.487 (17)
C10—C111.384 (14)C28—C291.396 (16)
C10—C151.396 (15)C28—H28A0.9500
C11—C121.376 (16)C29—H29A0.9500
C11—H11A0.9500C30—H30A0.9800
C12—C131.389 (16)C30—H30B0.9800
C12—H12A0.9500C30—H30C0.9800
C13—C141.395 (15)
P1—Au—S1174.54 (10)C15—C14—H14A119.1
C7—S1—Au108.4 (3)C13—C14—H14A119.1
C17—P1—C10106.3 (5)C14—C15—C10120.6 (10)
C17—P1—C24106.6 (4)C14—C15—H15A119.7
C10—P1—C24102.9 (4)C10—C15—H15A119.7
C17—P1—Au114.2 (4)C13—C16—H16A109.5
C10—P1—Au113.1 (3)C13—C16—H16B109.5
C24—P1—Au112.8 (3)H16A—C16—H16B109.5
C7—O1—C8117.8 (8)C13—C16—H16C109.5
C7—N1—C1123.4 (9)H16A—C16—H16C109.5
O3—N2—O2123.8 (11)H16B—C16—H16C109.5
O3—N2—C4119.5 (11)C18—C17—C22117.6 (8)
O2—N2—C4116.7 (11)C18—C17—P1123.3 (8)
C2—C1—C6118.4 (9)C22—C17—P1119.0 (8)
C2—C1—N1121.7 (10)C19—C18—C17121.4 (10)
C6—C1—N1119.8 (9)C19—C18—H18A119.3
C3—C2—C1121.9 (10)C17—C18—H18A119.3
C3—C2—H2A119.1C18—C19—C20121.4 (10)
C1—C2—H2A119.1C18—C19—H19A119.3
C2—C3—C4118.1 (9)C20—C19—H19A119.3
C2—C3—H3A120.9C21—C20—C19118.3 (10)
C4—C3—H3A120.9C21—C20—C23122.0 (10)
C3—C4—C5122.1 (10)C19—C20—C23119.7 (11)
C3—C4—N2119.4 (10)C20—C21—C22121.2 (10)
C5—C4—N2118.5 (10)C20—C21—H21A119.4
C6—C5—C4117.9 (10)C22—C21—H21A119.4
C6—C5—H5A121.0C21—C22—C17119.9 (10)
C4—C5—H5A121.0C21—C22—H22A120.0
C5—C6—C1121.5 (9)C17—C22—H22A120.0
C5—C6—H6A119.3C20—C23—H23A109.5
C1—C6—H6A119.3C20—C23—H23B109.5
N1—C7—O1120.3 (10)H23A—C23—H23B109.5
N1—C7—S1131.5 (8)C20—C23—H23C109.5
O1—C7—S1108.1 (7)H23A—C23—H23C109.5
O1—C8—C9112.5 (9)H23B—C23—H23C109.5
O1—C8—H8A109.1C29—C24—C25119.5 (9)
C9—C8—H8A109.1C29—C24—P1123.0 (8)
O1—C8—H8B109.1C25—C24—P1117.4 (7)
C9—C8—H8B109.1C26—C25—C24119.7 (9)
H8A—C8—H8B107.8C26—C25—H25A120.1
C8—C9—H9A109.5C24—C25—H25A120.1
C8—C9—H9B109.5C25—C26—C27121.7 (9)
H9A—C9—H9B109.5C25—C26—H26A119.2
C8—C9—H9C109.5C27—C26—H26A119.2
H9A—C9—H9C109.5C28—C27—C26117.1 (12)
H9B—C9—H9C109.5C28—C27—C30123.1 (13)
C11—C10—C15117.3 (10)C26—C27—C30119.9 (11)
C11—C10—P1120.7 (8)C27—C28—C29122.9 (12)
C15—C10—P1122.0 (8)C27—C28—H28A118.5
C12—C11—C10121.9 (10)C29—C28—H28A118.5
C12—C11—H11A119.0C24—C29—C28119.0 (10)
C10—C11—H11A119.0C24—C29—H29A120.5
C11—C12—C13121.3 (10)C28—C29—H29A120.5
C11—C12—H12A119.3C27—C30—H30A109.5
C13—C12—H12A119.3C27—C30—H30B109.5
C12—C13—C14116.8 (10)H30A—C30—H30B109.5
C12—C13—C16121.9 (11)C27—C30—H30C109.5
C14—C13—C16121.3 (12)H30A—C30—H30C109.5
C15—C14—C13121.9 (11)H30B—C30—H30C109.5
P1—Au—S1—C7−170.4 (10)C12—C13—C14—C15−4.9 (19)
S1—Au—P1—C17−86.1 (11)C16—C13—C14—C15176.6 (12)
S1—Au—P1—C1035.6 (12)C13—C14—C15—C105(2)
S1—Au—P1—C24151.9 (10)C11—C10—C15—C14−3.5 (18)
C7—N1—C1—C2−63.7 (14)P1—C10—C15—C14179.4 (10)
C7—N1—C1—C6119.0 (11)C10—P1—C17—C1841.1 (10)
C6—C1—C2—C32.6 (15)C24—P1—C17—C18−68.2 (9)
N1—C1—C2—C3−174.8 (9)Au—P1—C17—C18166.5 (8)
C1—C2—C3—C4−1.9 (15)C10—P1—C17—C22−141.8 (8)
C2—C3—C4—C50.6 (16)C24—P1—C17—C22108.9 (9)
C2—C3—C4—N2−179.0 (9)Au—P1—C17—C22−16.5 (9)
O3—N2—C4—C3−179.4 (11)C22—C17—C18—C19−3.0 (15)
O2—N2—C4—C30.1 (16)P1—C17—C18—C19174.2 (9)
O3—N2—C4—C50.9 (16)C17—C18—C19—C20−0.6 (17)
O2—N2—C4—C5−179.6 (10)C18—C19—C20—C213.2 (16)
C3—C4—C5—C6−0.2 (16)C18—C19—C20—C23−179.4 (10)
N2—C4—C5—C6179.5 (10)C19—C20—C21—C22−2.0 (16)
C4—C5—C6—C11.0 (17)C23—C20—C21—C22−179.4 (10)
C2—C1—C6—C5−2.1 (16)C20—C21—C22—C17−1.5 (15)
N1—C1—C6—C5175.3 (10)C18—C17—C22—C214.0 (15)
C1—N1—C7—O1169.9 (9)P1—C17—C22—C21−173.2 (8)
C1—N1—C7—S1−7.1 (16)C17—P1—C24—C2915.8 (10)
C8—O1—C7—N1−0.7 (13)C10—P1—C24—C29−95.9 (9)
C8—O1—C7—S1176.9 (7)Au—P1—C24—C29142.0 (8)
Au—S1—C7—N1−21.9 (11)C17—P1—C24—C25−167.3 (8)
Au—S1—C7—O1160.9 (5)C10—P1—C24—C2581.1 (9)
C7—O1—C8—C983.3 (12)Au—P1—C24—C25−41.1 (9)
C17—P1—C10—C1187.5 (9)C29—C24—C25—C262.7 (16)
C24—P1—C10—C11−160.6 (8)P1—C24—C25—C26−174.4 (9)
Au—P1—C10—C11−38.6 (9)C24—C25—C26—C27−1.4 (18)
C17—P1—C10—C15−95.5 (10)C25—C26—C27—C28−1(2)
C24—P1—C10—C1516.3 (10)C25—C26—C27—C30178.7 (12)
Au—P1—C10—C15138.4 (9)C26—C27—C28—C291(2)
C15—C10—C11—C122.0 (17)C30—C27—C28—C29−177.9 (13)
P1—C10—C11—C12179.2 (9)C25—C24—C29—C28−1.9 (16)
C10—C11—C12—C13−2.1 (18)P1—C24—C29—C28175.0 (9)
C11—C12—C13—C143.3 (18)C27—C28—C29—C24−0.3 (19)
C11—C12—C13—C16−178.2 (11)
Acknowledgements top

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references
References top

Flack, H. D. (1983). Acta Cryst. A39, 876–881.

Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan.

Ho, S. Y., Cheng, E. C.-C., Tiekink, E. R. T. & Yam, V. W.-W. (2006). Inorg. Chem. 45, 8165–8174.

Ho, S. Y. & Tiekink, E. R. T. (2007). CrystEngComm, 9, 368–378.

Johnson, C. K. (1976). ORTEPII. Report ORNL-5138. Oak Ridge National Laboratory, Tennessee, USA.

Kuan, F. S., Ho, S. Y., Tadbuppa, P. P. & Tiekink, E. R. T. (2008). CrystEngComm, 10, 568–564.

Rigaku/MSC (2005). CrystalClear. Rigaku/MSC Inc., The Woodlands, Texas, USA.

Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122.