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Acta Cryst. (2009). E65, m1264    [ doi:10.1107/S160053680903760X ]

Bis(acetylacetonato-[kappa]2O,O')aqua(diacetylmethanido-[kappa]C)iridium(III)

Q.-W. Chang, M.-J. Xie, W.-P. Liu, X.-Z. Chen and Q.-S. Ye

Abstract top

In the crystal structure of the title compound, [Ir(C5H7O2)3(H2O)], the IrIII atom is six-coordinated and situated in a slightly distorted octahedral environment. The complex contains both Ir-O and Ir-C bonds and was isolated from a reaction mixture of IrCl3(H2O)x, pentane-2,5-dione and NaHCO3. O-H...O hydrogen bonding between the water molecules and the carbonyl O atoms of adjacent molecules leads to a layered motif extending parallel to (010).

Comment top

[Ir(acac-O, O)2(acac-C3)(H2O)], as a novel, themally stable, homogeneous bis-acac-O, O—Ir(III) complex catalyst for the anti-Markovnikov, hydroarylation of olefins, has attracted considerable attention (Periana et al., 2002, Wong-Foy et al. 2003, Bhalla et al., 2005). Bennett et al. obtained [Ir(µ-acac-O,O,C3)(acac-O, O)(acac-C3)] and an unknown yellow solid as byproducts in the course of an attempt to improve the synthesis of Ir(acac)3 (Bennett & Mitchell, 1976). However, they were unable to purify the yellow solid or characterize its structure. Recently Periana et al. successfully isolated this yellow product in pure form and proved it to be [Ir(acac-O, O)2(acac-C3)(H2O)] by spectroscopic data(Periana et al., 2002). Despite the thermal and oxidative stability of octahedral iridium (III)-carbon σ -bonded complexes, there are little well characterized γ-C-bonded β-diketone complexes of iridium (III) except [Ir(µ-acac-O,O,C3)(acac-O, O)(acac-C3)] (Gibson, 1969, Matsumoto et al., 2000).

Recently the single-crystal of the compound was obtained in our laboratory and we report its crystallographic structure. In the complex, the central Ir atom is coordinated by a octahedron of four oxygen atoms of two acetylacetone ligands, one carbon atom of one acetylacetone ligand and one oxygen atom of water molcule. The average Ir—O bond length of two acetylacetone ligands is 2.02 Å, which agree with the literature data of Ir(acac)3 (Isakova et al., 1999), however, Ir—O bond length of coordinated water is 2.15 Å, which is longer than the former, whereas Ir—C bond length is found to be 2.13 Å. Intermolecular C—H···O hydrogen bond (Desiraju, 1996) and C—H···C hydrogen bond are present in the structure; while the C···O distances are within the range of 3.039 (9)–3.486 (10) Å, C—H···O are found to be within the range of 110–168°. The compound forms a hydrogen-bonded chain in which the O5 water uses two H atom to serve as a donor to the O atoms of adjacent molecules, these weaker interactions giving rise to a three-dimensional framework structure.

Related literature top

For background on the title compound, see: Bennett & Mitchell (1976); Bhalla et al. (2005); Gibson (1969); Matsumoto et al. (2000); Periana et al. (2002); Wong-Foy et al. (2003). For a related structure, see: Isakova et al. (1999); For background on hydrogen bonding, see: Desiraju (1996). Please check added text.t

Experimental top

The complex was synthesized according literature (see Periana et al., 2002). In a round-bottom flask equipped with a reflux condenser vented to an oil bubble, 5 g of IrCl3 (H2O)x (54.34% of Ir, 14.13 mmol), 50 ml of 2, 5-pentadione (48.75 mmol) and 5 g of NaHCO3(59.5 mmol) were added. The mixture was heated to gentle reflux with stirring for 48 h. During this time, a yellow solid precipitated. The reaction mixture was cooled to room temperature and the solid was collected as crude product. The yellow solid was dissolved in 200 ml H2O at room temperature under vigorous stirring and was filtered. Solution was concentrated under vacuo to give 3.15 g (43.6%) complex as yellow microcrystalline. The compound was crystallized from water to obtain crystals suitable for X-ray structure analysis. 1HNMR (CD3OD,p.p.m.):5.54(s, 2H, CH), 5.49(s, 1H, CH), 1.96(s, 12H, CH3), 1.83(s, 6H, CH3). 13CNMR (dmso,p.p.m.): 208.4(s, C-acac, C=O), 186.1(s, O-acac, C=O), 102.6(s, O-acac, CH), 48.6(s, C-acac, CH), 31.6(s, C-acac, CH3, 26.6(s, O-acac, CH3). Anal. Calcd: Ir, 37.95; C, 35.54; H, 4.93. Found: Ir, 37.90; C, 35.48; H, 4.87.

Refinement top

All H atoms were initially located in a difference Fourier map but were positioned with idealized geometry and refined isotropic with Uiso(H)=1.2Ueq(C) (1.5 for methyl H atoms) using a riding model with C—H = 0.93 and 0.97 Å).

Computing details top

Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. Molecular view of the complex, with the atomic labeling scheme. Displacement ellipsoids are shown at the 30% probability level.
[Figure 2] Fig. 2. Packing view, showing the C—H···O hydrogen-bond network between the complexes. Only the H atoms involved in H bonding are drawn. Hydrogen bonds are shown as dashed lines.
Bis(acetylacetonato-κ2O,O')aqua(diacetylmethanido- κC)iridium(III) top
Crystal data top
[Ir(C5H7O2)3(H2O)]Z = 2
Mr = 507.54F(000) = 492
Triclinic, P1Dx = 1.968 Mg m−3
a = 7.7853 (13) ÅMo Kα radiation, λ = 0.71073 Å
b = 7.9461 (13) ÅCell parameters from 1164 reflections
c = 16.362 (3) Åθ = 1.3–28.4°
α = 77.295 (2)°µ = 7.82 mm−1
β = 77.927 (2)°T = 293 K
γ = 60.918 (1)°Block, orange
V = 856.7 (3) Å30.15 × 0.13 × 0.09 mm
Data collection top
Bruker APEXII CCD area-detector
diffractometer		3900 independent reflections
Radiation source: fine-focus sealed tube2885 reflections with I > 2σ(I)
graphiteRint = 0.061
φ and ω scansθmax = 28.4°, θmin = 1.3°
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)		h = −10→10
Tmin = 0.387, Tmax = 0.539k = −10→10
7435 measured reflectionsl = −21→21
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)] = 0.058H-atom parameters constrained
wR(F2) = 0.127 w = 1/[σ2(Fo2) + (0.0469P)2]
where P = (Fo2 + 2Fc2)/3
S = 1.02(Δ/σ)max = 0.001
3900 reflectionsΔρmax = 2.37 e Å−3
215 parametersΔρmin = −1.87 e Å−3
0 restraintsExtinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.0013 (5)
Crystal data top
[Ir(C5H7O2)3(H2O)]γ = 60.918 (1)°
Mr = 507.54V = 856.7 (3) Å3
Triclinic, P1Z = 2
a = 7.7853 (13) ÅMo Kα radiation
b = 7.9461 (13) ŵ = 7.82 mm−1
c = 16.362 (3) ÅT = 293 K
α = 77.295 (2)°0.15 × 0.13 × 0.09 mm
β = 77.927 (2)°
Data collection top
Bruker APEXII CCD area-detector
diffractometer		3900 independent reflections
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)		2885 reflections with I > 2σ(I)
Tmin = 0.387, Tmax = 0.539Rint = 0.061
7435 measured reflectionsθmax = 28.4°
Refinement top
R[F2 > 2σ(F2)] = 0.058H-atom parameters constrained
wR(F2) = 0.127Δρmax = 2.37 e Å−3
S = 1.02Δρmin = −1.87 e Å−3
3900 reflectionsAbsolute structure: ?
215 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
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
Ir10.36783 (6)0.62096 (6)0.25137 (3)0.02612 (17)
O10.3350 (11)0.7800 (11)0.1361 (5)0.0327 (18)
O20.6421 (11)0.4122 (11)0.2154 (5)0.0355 (19)
O30.1042 (10)0.8433 (10)0.2871 (5)0.0315 (17)
O40.4064 (11)0.4697 (11)0.3682 (5)0.0334 (18)
O50.5066 (10)0.7689 (10)0.2858 (5)0.0337 (18)
H5D0.55770.81150.24300.050*
H5E0.59970.68570.31870.050*
O6−0.0934 (12)0.5794 (12)0.2823 (6)0.046 (2)
O70.4419 (13)0.1349 (12)0.2185 (5)0.048 (2)
C10.4627 (18)0.7249 (17)0.0700 (7)0.035 (3)
C20.402 (2)0.8478 (19)−0.0103 (7)0.047 (3)
H2A0.33120.8038−0.03470.070*
H2B0.51670.8398−0.04830.070*
H2C0.31720.9801−0.00060.070*
C30.6452 (19)0.5594 (18)0.0726 (8)0.046 (3)
H30.72560.53840.02120.055*
C40.7252 (17)0.4194 (15)0.1418 (8)0.034 (3)
C50.9347 (19)0.256 (2)0.1293 (9)0.055 (4)
H5A0.93850.13530.15780.083*
H5B1.02240.28190.15190.083*
H5C0.97560.24800.07010.083*
C60.2844 (19)0.5342 (18)0.4321 (7)0.040 (3)
C70.334 (2)0.402 (2)0.5146 (8)0.055 (4)
H7A0.25500.33520.52890.083*
H7B0.30740.47810.55820.083*
H7C0.47180.30910.50920.083*
C80.1094 (19)0.7063 (19)0.4332 (8)0.044 (3)
H80.03800.73180.48600.052*
C90.0265 (18)0.8459 (17)0.3658 (7)0.036 (3)
C10−0.1719 (19)1.0193 (19)0.3801 (8)0.054 (4)
H10A−0.17591.12960.34050.080*
H10B−0.19231.04750.43650.080*
H10C−0.27420.99160.37250.080*
C110.2348 (16)0.4738 (15)0.2148 (8)0.034 (3)
H110.27840.46690.15440.041*
C120.0184 (17)0.5990 (16)0.2220 (8)0.033 (3)
C13−0.0656 (19)0.7536 (19)0.1483 (8)0.051 (3)
H13A−0.05910.69330.10220.076*
H13B0.01010.82410.13090.076*
H13C−0.20090.84170.16490.076*
C140.3079 (17)0.2716 (16)0.2559 (7)0.030 (2)
C150.226 (2)0.2179 (18)0.3450 (8)0.046 (3)
H15A0.33410.13300.37760.070*
H15B0.15110.15290.34280.070*
H15C0.14270.33370.37070.070*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Ir10.0211 (2)0.0223 (2)0.0273 (2)−0.00479 (17)−0.00288 (16)−0.00175 (15)
O10.028 (4)0.031 (4)0.035 (4)−0.012 (4)0.001 (4)−0.007 (4)
O20.030 (4)0.030 (4)0.039 (5)−0.008 (4)0.000 (4)−0.006 (4)
O30.025 (4)0.027 (4)0.032 (4)−0.002 (3)−0.007 (3)−0.007 (3)
O40.033 (4)0.041 (5)0.024 (4)−0.017 (4)−0.004 (3)0.003 (3)
O50.021 (4)0.032 (4)0.038 (4)−0.008 (3)−0.006 (3)0.003 (4)
O60.026 (5)0.044 (5)0.058 (6)−0.010 (4)−0.005 (4)0.000 (4)
O70.056 (6)0.028 (4)0.048 (5)−0.011 (4)0.009 (4)−0.016 (4)
C10.045 (7)0.039 (7)0.024 (6)−0.021 (6)−0.007 (5)−0.003 (5)
C20.059 (9)0.051 (8)0.030 (7)−0.028 (7)−0.018 (6)0.011 (6)
C30.052 (8)0.043 (8)0.029 (7)−0.012 (7)−0.003 (6)−0.004 (6)
C40.030 (6)0.020 (5)0.049 (7)−0.009 (5)0.004 (6)−0.015 (5)
C50.039 (8)0.054 (9)0.060 (9)−0.010 (7)0.011 (7)−0.029 (7)
C60.046 (8)0.048 (8)0.029 (6)−0.029 (7)0.002 (6)0.002 (6)
C70.054 (9)0.078 (11)0.039 (7)−0.036 (8)−0.011 (7)0.002 (7)
C80.044 (8)0.055 (8)0.031 (7)−0.023 (7)0.009 (6)−0.016 (6)
C90.039 (7)0.033 (7)0.036 (7)−0.017 (6)0.003 (6)−0.012 (5)
C100.038 (8)0.049 (8)0.043 (8)0.001 (7)−0.001 (6)−0.005 (7)
C110.021 (6)0.022 (6)0.050 (7)−0.002 (5)−0.005 (5)−0.003 (5)
C120.030 (6)0.026 (6)0.043 (7)−0.010 (5)−0.011 (6)−0.009 (5)
C130.043 (8)0.047 (8)0.049 (8)−0.015 (7)−0.006 (6)0.003 (6)
C140.038 (7)0.030 (6)0.032 (6)−0.021 (5)−0.009 (5)−0.006 (5)
C150.058 (9)0.041 (7)0.042 (7)−0.024 (7)−0.003 (6)−0.005 (6)
Geometric parameters (Å, °) top
Ir1—O12.015 (8)C5—H5C0.9600
Ir1—O42.017 (7)C6—C81.384 (17)
Ir1—O32.026 (7)C6—C71.508 (16)
Ir1—O22.029 (7)C7—H7A0.9600
Ir1—C112.131 (11)C7—H7B0.9600
Ir1—O52.155 (7)C7—H7C0.9600
O1—C11.297 (13)C8—C91.388 (17)
O2—C41.245 (13)C8—H80.9300
O3—C91.302 (13)C9—C101.504 (16)
O4—C61.266 (13)C10—H10A0.9600
O5—H5D0.8200C10—H10B0.9600
O5—H5E0.8900C10—H10C0.9600
O6—C121.208 (13)C11—C141.468 (14)
O7—C141.252 (13)C11—C121.477 (15)
C1—C31.391 (16)C11—H110.9800
C1—C21.468 (15)C12—C131.513 (16)
C2—H2A0.9600C13—H13A0.9600
C2—H2B0.9600C13—H13B0.9600
C2—H2C0.9600C13—H13C0.9600
C3—C41.406 (16)C14—C151.520 (15)
C3—H30.9300C15—H15A0.9600
C4—C51.518 (16)C15—H15B0.9600
C5—H5A0.9600C15—H15C0.9600
C5—H5B0.9600
O1—Ir1—O4177.1 (3)O4—C6—C7115.2 (11)
O1—Ir1—O384.6 (3)C8—C6—C7117.6 (11)
O4—Ir1—O395.1 (3)C6—C7—H7A109.5
O1—Ir1—O294.2 (3)C6—C7—H7B109.5
O4—Ir1—O285.9 (3)H7A—C7—H7B109.5
O3—Ir1—O2175.4 (3)C6—C7—H7C109.5
O1—Ir1—C1187.6 (4)H7A—C7—H7C109.5
O4—Ir1—C1195.3 (4)H7B—C7—H7C109.5
O3—Ir1—C1193.5 (4)C6—C8—C9128.5 (11)
O2—Ir1—C1190.9 (4)C6—C8—H8115.7
O1—Ir1—O591.6 (3)C9—C8—H8115.7
O4—Ir1—O585.5 (3)O3—C9—C8126.0 (11)
O3—Ir1—O587.3 (3)O3—C9—C10113.8 (10)
O2—Ir1—O588.2 (3)C8—C9—C10120.2 (11)
C11—Ir1—O5178.8 (4)C9—C10—H10A109.5
C1—O1—Ir1123.5 (7)C9—C10—H10B109.5
C4—O2—Ir1122.2 (7)H10A—C10—H10B109.5
C9—O3—Ir1121.2 (7)C9—C10—H10C109.5
C6—O4—Ir1121.9 (8)H10A—C10—H10C109.5
Ir1—O5—H5D109.5H10B—C10—H10C109.5
Ir1—O5—H5E109.5C14—C11—C12117.6 (10)
H5D—O5—H5E109.2C14—C11—Ir1112.4 (8)
O1—C1—C3123.7 (10)C12—C11—Ir1108.4 (7)
O1—C1—C2115.6 (11)C14—C11—H11105.8
C3—C1—C2120.7 (11)C12—C11—H11105.8
C1—C2—H2A109.5Ir1—C11—H11105.8
C1—C2—H2B109.5O6—C12—C11123.2 (11)
H2A—C2—H2B109.5O6—C12—C13119.2 (11)
C1—C2—H2C109.5C11—C12—C13117.6 (11)
H2A—C2—H2C109.5C12—C13—H13A109.5
H2B—C2—H2C109.5C12—C13—H13B109.5
C1—C3—C4129.1 (11)H13A—C13—H13B109.5
C1—C3—H3115.5C12—C13—H13C109.5
C4—C3—H3115.5H13A—C13—H13C109.5
O2—C4—C3126.9 (11)H13B—C13—H13C109.5
O2—C4—C5114.0 (11)O7—C14—C11120.8 (10)
C3—C4—C5119.1 (11)O7—C14—C15117.0 (10)
C4—C5—H5A109.5C11—C14—C15122.2 (10)
C4—C5—H5B109.5C14—C15—H15A109.5
H5A—C5—H5B109.5C14—C15—H15B109.5
C4—C5—H5C109.5H15A—C15—H15B109.5
H5A—C5—H5C109.5C14—C15—H15C109.5
H5B—C5—H5C109.5H15A—C15—H15C109.5
O4—C6—C8127.1 (11)H15B—C15—H15C109.5
O4—Ir1—O1—C196 (6)C1—C3—C4—C5−176.5 (12)
O3—Ir1—O1—C1−179.7 (9)Ir1—O4—C6—C82.3 (17)
O2—Ir1—O1—C14.8 (9)Ir1—O4—C6—C7179.4 (8)
C11—Ir1—O1—C1−85.9 (9)O4—C6—C8—C91(2)
O5—Ir1—O1—C193.2 (9)C7—C6—C8—C9−176.4 (13)
O1—Ir1—O2—C40.1 (9)Ir1—O3—C9—C81.1 (16)
O4—Ir1—O2—C4−177.0 (9)Ir1—O3—C9—C10−178.4 (8)
O3—Ir1—O2—C4−76 (4)C6—C8—C9—O3−3(2)
C11—Ir1—O2—C487.7 (9)C6—C8—C9—C10176.9 (13)
O5—Ir1—O2—C4−91.4 (9)O1—Ir1—C11—C14149.4 (8)
O1—Ir1—O3—C9−176.0 (8)O4—Ir1—C11—C14−30.7 (8)
O4—Ir1—O3—C91.1 (8)O3—Ir1—C11—C14−126.1 (8)
O2—Ir1—O3—C9−100 (4)O2—Ir1—C11—C1455.2 (8)
C11—Ir1—O3—C996.8 (9)O5—Ir1—C11—C14101 (17)
O5—Ir1—O3—C9−84.1 (8)O1—Ir1—C11—C12−78.8 (8)
O1—Ir1—O4—C681 (6)O4—Ir1—C11—C12101.0 (8)
O3—Ir1—O4—C6−2.7 (9)O3—Ir1—C11—C125.6 (8)
O2—Ir1—O4—C6172.7 (9)O2—Ir1—C11—C12−173.0 (8)
C11—Ir1—O4—C6−96.8 (9)O5—Ir1—C11—C12−127 (16)
O5—Ir1—O4—C684.2 (9)C14—C11—C12—O630.9 (17)
Ir1—O1—C1—C3−6.4 (16)Ir1—C11—C12—O6−98.0 (11)
Ir1—O1—C1—C2172.5 (8)C14—C11—C12—C13−146.7 (11)
O1—C1—C3—C42(2)Ir1—C11—C12—C1384.4 (11)
C2—C1—C3—C4−176.5 (13)C12—C11—C14—O7135.2 (12)
Ir1—O2—C4—C3−3.7 (17)Ir1—C11—C14—O7−97.9 (11)
Ir1—O2—C4—C5176.3 (7)C12—C11—C14—C15−45.0 (16)
C1—C3—C4—O23(2)Ir1—C11—C14—C1582.0 (12)
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
O5—H5D···O7i0.822.242.706 (11)116
O5—H5E···O6ii0.892.112.715 (11)125
Symmetry codes: (i) x, y+1, z; (ii) x+1, y, z.
Table 1
Selected geometric parameters (Å) top
Ir1—O12.015 (8)Ir1—O22.029 (7)
Ir1—O42.017 (7)Ir1—C112.131 (11)
Ir1—O32.026 (7)Ir1—O52.155 (7)
Table 2
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
O5—H5D···O7i0.822.242.706 (11)116
O5—H5E···O6ii0.892.112.715 (11)125
Symmetry codes: (i) x, y+1, z; (ii) x+1, y, z.
Acknowledgements top

This work was financially supported by Yunnan Provincial Science and Technology Department of the People's Republic of China (grant Nos. 2008IA008 and 2008CF002)

references
References top

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