Crystal structure of tris­(phenyl­seleno­lato-κSe)tris­(tetra­hydro­furan-κO)thulium(III)

Takaluoma, E.M.; Oilunkaniemi, R.; Lehmann, C.W.; Laitinen, R.S.

doi:10.1107/S1600536814023733

metal-organic compounds

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ISSN: 2056-9890

Volume 70| Part 11| November 2014| Page m389

doi:10.1107/S1600536814023733

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Crystal structure of tris(phenylselenolato-κSe)tris(tetrahydrofuran-κO)thulium(III)

Esther M. Takaluoma,^a Raija Oilunkaniemi,^a Christian W. Lehmann ^b and Risto S. Laitinen ^a ^*

^aDepartment of Chemistry, PO Box 3000, FI-90014 University of Oulu, Finland, and ^bMax-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
^*Correspondence e-mail: risto.laitinen@oulu.fi

Edited by H. Stoeckli-Evans, University of Neuchâtel, Switzerland (Received 21 October 2014; accepted 28 October 2014; online 31 October 2014)

In the title compound, [Tm(C₆H₅Se)₃(C₄H₈O)₃], the Tm^III atom lies on a threefold rotation axis and is coordinated by three phenylselenolate ligands and three tetrahydrofuran ligands leading to a distorted fac-octahedral coordination environment. The Tm—Se and Tm—O bond lengths are 2.7692 (17) and 2.345 (10) Å, respectively, and the bond angles are 91.32 (6)° for Se—Tm—Se, 92.6 (2) and 94.4 (2)° for Se—Tm—O, and 81.2 (3)° for O—Tm—O. In the crystal, the discrete complexes are linked by van der Waals interactions only. The crystal was refined as a non-merohedral twin (ratio = 0.65:0.35).

Keywords: crystal structure; thulium complex; phenylselenolate ligand.

CCDC reference: 1031290

1. Related literature

For the synthesis of the title compound, see: Lee et al. (1998 ). For the crystal structures of the isotypic compounds [Er(SePh)₃(THF)₃] and [Yb(SePh)₃(THF)₃], see: Lee et al. (1998); Geissinger & Magull (1995 ). For a binuclear selenolate complex of thulium, see: Lee et al. (1995 ).

2. Experimental

2.1. Crystal data

[Tm(C₆H₅Se)₃(C₄H₈O)₃]
M_r = 853.42
Trigonal, P 31c
a = 15.277 (2) Å
c = 7.8708 (16) Å
V = 1590.9 (6) Å³
Z = 2
Mo Kα radiation
μ = 6.25 mm⁻¹
T = 120 K
0.40 × 0.20 × 0.10 mm

2.2. Data collection

Bruker–Nonius KappaCCD diffractometer
Absorption correction: multi-scan (XPREP in SHELXTL; Sheldrick, 2008 ) T_min = 0.189, T_max = 0.574
5660 measured reflections
2151 independent reflections
2053 reflections with I > 2σ(I)
R_int = 0.053

2.3. Refinement

R[F² > 2σ(F²)] = 0.038
wR(F²) = 0.087
S = 1.10
2151 reflections
127 parameters
9 restraints
H-atom parameters constrained
Δρ_max = 0.76 e Å⁻³
Δρ_min = −1.43 e Å⁻³
Absolute structure: Flack x determined using 812 quotients [(I⁺)−(I⁻)]/[(I⁺)+(I⁻)] (Parsons & Flack, 2004 )
Absolute structure parameter: −0.03 (3)

Data collection: COLLECT (Bruker, 2008 ); cell refinement: DENZO-SMN (Otwinowski & Minor, 1997 ); data reduction: DENZO-SMN; program(s) used to solve structure: SIR92 (Altomare et al., 1993 ); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2006 ); software used to prepare material for publication: WinGX (Farrugia, 2012 ).

Supporting information

CCDC reference: 1031290

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536814023733/su5009sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536814023733/su5009Isup2.hkl

checkCIF report

Synthesis and crystallization top

The title compound was synthesized by the literature procedure [Lee et al. (1998)]. The crystals were obtained from THF at 255 K.

Refinement top

H atoms were positioned geometrically and refined using a riding model with C—H = 0.95 - 0.99 Å and with U_iso(H) = 1.2U_eq(C). The crystal is a non-merohedral with twin law of -1 0 0, 0 -1 0, 0 0 1 and a ratio of 0.65:0.35. The THF ligands show positional disorder with an occupancy ratio of 0.79 (3):0.21 (3).

Related literature top

For the synthesis of the title compound, see: Lee et al. (1998). For the crystal structures of the isotypic compounds [Er(SePh)₃(THF)₃] and [Yb(SePh)₃(THF)₃], see: Lee et al. (1998); Geissinger & Magull (1995). For a binuclear selenolate complex of thulium, see: Lee et al. (1995).

Computing details top

Data collection: COLLECT (Bruker, 2008); cell refinement: DENZO-SMN (Otwinowski & Minor, 1997); data reduction: DENZO-SMN (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2006); software used to prepare material for publication: WinGX (Farrugia, 2012).

Figures top

The molecular structure of the title compound, with atom labelling. Displacement ellipsoids are drawn at the 50% probability level. Only the more abundant orientation of the disordered THF ligands is shown (symmetry codes: (i) x, y, z; (ii) -y, x-y, z; (iii) -x + y, -x, z; (iv) y, x, z + 1/2; (v) x-y, -y, z + 1/2; (vi) -x, -x + y, z + 1/2.

A perspective view along the c axis of the crystal packing of the title compound.

Tris(phenylselenolato-κSe)tris(tetrahydrofuran-κO)thulium(III) top

Crystal data top

[Tm(C₆H₅Se)₃(C₄H₈O)₃]	D_x = 1.782 Mg m⁻³
M_r = 853.42	Mo Kα radiation, λ = 0.71073 Å
Trigonal, P31c	Cell parameters from 2053 reflections
a = 15.277 (2) Å	θ = 3.1–28.1°
c = 7.8708 (16) Å	µ = 6.25 mm⁻¹
V = 1590.9 (6) Å³	T = 120 K
Z = 2	Block, pale yellow-green
F(000) = 828	0.40 × 0.20 × 0.10 mm

Data collection top

Bruker–Nonius KappaCCD diffractometer	2053 reflections with I > 2σ(I)
ϕ scans, and ω scans with κ offsets	R_int = 0.053
Absorption correction: multi-scan (XPREP in SHELXTL; Sheldrick, 2008)	θ_max = 28.1°, θ_min = 3.1°
T_min = 0.189, T_max = 0.574	h = −16→20
5660 measured reflections	k = −18→14
2151 independent reflections	l = −9→10

Refinement top

Refinement on F²	H-atom parameters constrained
Least-squares matrix: full	w = 1/[σ²(F_o²) + 8.380P] where P = (F_o² + 2F_c²)/3
R[F² > 2σ(F²)] = 0.038	(Δ/σ)_max < 0.001
wR(F²) = 0.087	Δρ_max = 0.76 e Å⁻³
S = 1.10	Δρ_min = −1.43 e Å⁻³
2151 reflections	Extinction correction: SHELXL2013 (Sheldrick, 20008), Fc^*=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4
127 parameters	Extinction coefficient: 0.0089 (14)
9 restraints	Absolute structure: Flack x determined using 812 quotients [(I⁺)-(I^-)]/[(I⁺)+(I^-)] (Parsons & Flack, 2004)
Hydrogen site location: inferred from neighbouring sites	Absolute structure parameter: −0.03 (3)

Crystal data top

[Tm(C₆H₅Se)₃(C₄H₈O)₃]	Z = 2
M_r = 853.42	Mo Kα radiation
Trigonal, P31c	µ = 6.25 mm⁻¹
a = 15.277 (2) Å	T = 120 K
c = 7.8708 (16) Å	0.40 × 0.20 × 0.10 mm
V = 1590.9 (6) Å³

Data collection top

Bruker–Nonius KappaCCD diffractometer	2151 independent reflections
Absorption correction: multi-scan (XPREP in SHELXTL; Sheldrick, 2008)	2053 reflections with I > 2σ(I)
T_min = 0.189, T_max = 0.574	R_int = 0.053
5660 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.038	H-atom parameters constrained
wR(F²) = 0.087	Δρ_max = 0.76 e Å⁻³
S = 1.10	Δρ_min = −1.43 e Å⁻³
2151 reflections	Absolute structure: Flack x determined using 812 quotients [(I⁺)-(I^-)]/[(I⁺)+(I^-)] (Parsons & Flack, 2004)
127 parameters	Absolute structure parameter: −0.03 (3)
9 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. Refined as a 2-component twin.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq	Occ. (<1)
Tm1	0.6667	0.3333	0.08579 (18)	0.0326 (3)
Se1	0.63991 (14)	0.46785 (13)	−0.11260 (16)	0.0456 (4)
O1	0.7727 (7)	0.4562 (7)	0.2822 (12)	0.034 (2)
C1	0.7309 (12)	0.5979 (12)	−0.0110 (17)	0.040 (4)
C2	0.6951 (13)	0.6510 (11)	0.081 (3)	0.055 (4)
H2	0.6247	0.6222	0.1023	0.066*
C3	0.7629 (18)	0.7463 (15)	0.142 (2)	0.069 (6)
H3	0.7377	0.7829	0.2025	0.082*
C4	0.8656 (14)	0.7899 (15)	0.119 (2)	0.061 (6)
H4	0.9107	0.8545	0.1655	0.074*
C5	0.9021 (15)	0.7375 (14)	0.026 (2)	0.056 (5)
H5	0.9725	0.7669	0.0057	0.067*
C6	0.8341 (15)	0.6407 (12)	−0.038 (2)	0.051 (5)
H6	0.8591	0.6043	−0.0998	0.061*
C7A	0.7418 (19)	0.5034 (16)	0.406 (2)	0.044 (5)	0.79 (3)
H7AA	0.6992	0.4534	0.4932	0.052*	0.79 (3)
H7BA	0.7017	0.5302	0.3514	0.052*	0.79 (3)
C8A	0.8335 (15)	0.587 (2)	0.487 (3)	0.061 (8)	0.79 (3)
H8AA	0.8218	0.5946	0.6082	0.074*	0.79 (3)
H8BA	0.8556	0.6521	0.4276	0.074*	0.79 (3)
C9A	0.9087 (15)	0.5529 (15)	0.465 (2)	0.044 (6)	0.79 (3)
H9AA	0.9009	0.5034	0.5539	0.053*	0.79 (3)
H9BA	0.9789	0.6104	0.4666	0.053*	0.79 (3)
C10A	0.879 (2)	0.505 (3)	0.293 (4)	0.045 (7)	0.79 (3)
H0AA	0.9104	0.5568	0.2032	0.055*	0.79 (3)
H0BA	0.9021	0.4551	0.2782	0.055*	0.79 (3)
C7B	0.743 (9)	0.484 (8)	0.454 (9)	0.044 (5)	0.21 (3)
H7AB	0.7077	0.5231	0.4379	0.052*	0.21 (3)
H7BB	0.7010	0.4239	0.5246	0.052*	0.21 (3)
C8B	0.850 (6)	0.551 (8)	0.532 (12)	0.061 (8)	0.21 (3)
H8AB	0.8521	0.6075	0.5967	0.074*	0.21 (3)
H8BB	0.8655	0.5099	0.6107	0.074*	0.21 (3)
C9B	0.928 (5)	0.592 (6)	0.386 (9)	0.044 (6)	0.21 (3)
H9AB	0.9961	0.6094	0.4276	0.053*	0.21 (3)
H9BB	0.9320	0.6533	0.3350	0.053*	0.21 (3)
C10B	0.888 (7)	0.505 (13)	0.26 (2)	0.045 (7)	0.21 (3)
H0AB	0.9122	0.4568	0.2814	0.055*	0.21 (3)
H0BB	0.9084	0.5304	0.1378	0.055*	0.21 (3)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Tm1	0.0385 (3)	0.0385 (3)	0.0206 (4)	0.01927 (16)	0.000	0.000
Se1	0.0548 (9)	0.0551 (10)	0.0316 (7)	0.0311 (9)	−0.0015 (8)	0.0096 (8)
O1	0.036 (5)	0.041 (6)	0.024 (4)	0.020 (5)	0.007 (4)	0.001 (4)
C1	0.054 (11)	0.045 (8)	0.028 (8)	0.031 (8)	0.005 (7)	0.017 (6)
C2	0.070 (10)	0.056 (10)	0.052 (9)	0.041 (9)	0.036 (12)	0.019 (11)
C3	0.13 (2)	0.072 (13)	0.042 (9)	0.077 (15)	0.016 (11)	0.012 (9)
C4	0.066 (12)	0.045 (9)	0.054 (13)	0.013 (8)	−0.005 (8)	−0.007 (8)
C5	0.061 (11)	0.045 (9)	0.069 (12)	0.033 (9)	0.012 (8)	0.006 (9)
C6	0.045 (10)	0.053 (9)	0.043 (8)	0.016 (9)	−0.009 (8)	−0.002 (6)
C7A	0.059 (11)	0.048 (11)	0.014 (9)	0.020 (10)	0.006 (11)	0.010 (8)
C8A	0.064 (14)	0.062 (18)	0.038 (14)	0.016 (12)	−0.003 (10)	−0.017 (12)
C9A	0.040 (11)	0.043 (12)	0.026 (10)	0.004 (10)	0.001 (9)	0.011 (8)
C10A	0.053 (12)	0.060 (11)	0.03 (2)	0.034 (10)	−0.001 (11)	0.003 (13)
C7B	0.059 (11)	0.048 (11)	0.014 (9)	0.020 (10)	0.006 (11)	0.010 (8)
C8B	0.064 (14)	0.062 (18)	0.038 (14)	0.016 (12)	−0.003 (10)	−0.017 (12)
C9B	0.040 (11)	0.043 (12)	0.026 (10)	0.004 (10)	0.001 (9)	0.011 (8)
C10B	0.053 (12)	0.060 (11)	0.03 (2)	0.034 (10)	−0.001 (11)	0.003 (13)

Geometric parameters (Å, º) top

Tm1—O1ⁱ	2.345 (10)	C7A—C8A	1.49 (2)
Tm1—O1	2.345 (10)	C7A—H7AA	0.9900
Tm1—O1ⁱⁱ	2.345 (10)	C7A—H7BA	0.9900
Tm1—Se1ⁱ	2.7692 (17)	C8A—C9A	1.49 (2)
Tm1—Se1ⁱⁱ	2.7692 (17)	C8A—H8AA	0.9900
Tm1—Se1	2.7692 (17)	C8A—H8BA	0.9900
Se1—C1	1.938 (18)	C9A—C10A	1.50 (2)
O1—C10A	1.41 (3)	C9A—H9AA	0.9900
O1—C7A	1.42 (3)	C9A—H9BA	0.9900
O1—C10B	1.55 (10)	C10A—H0AA	0.9900
O1—C7B	1.56 (10)	C10A—H0BA	0.9900
C1—C2	1.39 (2)	C7B—C8B	1.55 (9)
C1—C6	1.39 (3)	C7B—H7AB	0.9900
C2—C3	1.38 (3)	C7B—H7BB	0.9900
C2—H2	0.9500	C8B—C9B	1.55 (9)
C3—C4	1.38 (3)	C8B—H8AB	0.9900
C3—H3	0.9500	C8B—H8BB	0.9900
C4—C5	1.39 (2)	C9B—C10B	1.55 (9)
C4—H4	0.9500	C9B—H9AB	0.9900
C5—C6	1.41 (2)	C9B—H9BB	0.9900
C5—H5	0.9500	C10B—H0AB	0.9900
C6—H6	0.9500	C10B—H0BB	0.9900

O1ⁱ—Tm1—O1	81.2 (3)	C8A—C7A—H7BA	110.0
O1ⁱ—Tm1—O1ⁱⁱ	81.2 (3)	H7AA—C7A—H7BA	108.3
O1—Tm1—O1ⁱⁱ	81.2 (3)	C7A—C8A—C9A	102 (2)
O1ⁱ—Tm1—Se1ⁱ	94.4 (2)	C7A—C8A—H8AA	111.4
O1—Tm1—Se1ⁱ	92.6 (2)	C9A—C8A—H8AA	111.4
O1ⁱⁱ—Tm1—Se1ⁱ	173.0 (2)	C7A—C8A—H8BA	111.4
O1ⁱ—Tm1—Se1ⁱⁱ	92.6 (2)	C9A—C8A—H8BA	111.4
O1—Tm1—Se1ⁱⁱ	173.0 (2)	H8AA—C8A—H8BA	109.2
O1ⁱⁱ—Tm1—Se1ⁱⁱ	94.4 (2)	C8A—C9A—C10A	100 (2)
Se1ⁱ—Tm1—Se1ⁱⁱ	91.32 (6)	C8A—C9A—H9AA	111.7
O1ⁱ—Tm1—Se1	173.0 (2)	C10A—C9A—H9AA	111.7
O1—Tm1—Se1	94.4 (2)	C8A—C9A—H9BA	111.7
O1ⁱⁱ—Tm1—Se1	92.6 (2)	C10A—C9A—H9BA	111.7
Se1ⁱ—Tm1—Se1	91.32 (6)	H9AA—C9A—H9BA	109.5
Se1ⁱⁱ—Tm1—Se1	91.32 (6)	O1—C10A—C9A	107.3 (17)
C1—Se1—Tm1	103.4 (4)	O1—C10A—H0AA	110.3
C10A—O1—C7A	106.2 (19)	C9A—C10A—H0AA	110.3
C10B—O1—C7B	114 (7)	O1—C10A—H0BA	110.3
C10A—O1—Tm1	127.8 (12)	C9A—C10A—H0BA	110.3
C7A—O1—Tm1	125.8 (11)	H0AA—C10A—H0BA	108.5
C10B—O1—Tm1	117 (4)	C8B—C7B—O1	100 (7)
C7B—O1—Tm1	128 (4)	C8B—C7B—H7AB	111.8
C2—C1—C6	119.4 (16)	O1—C7B—H7AB	111.8
C2—C1—Se1	121.6 (13)	C8B—C7B—H7BB	111.8
C6—C1—Se1	118.9 (12)	O1—C7B—H7BB	111.8
C3—C2—C1	119.3 (16)	H7AB—C7B—H7BB	109.5
C3—C2—H2	120.3	C9B—C8B—C7B	109 (7)
C1—C2—H2	120.3	C9B—C8B—H8AB	110.0
C4—C3—C2	122.4 (17)	C7B—C8B—H8AB	110.0
C4—C3—H3	118.8	C9B—C8B—H8BB	110.0
C2—C3—H3	118.8	C7B—C8B—H8BB	110.0
C3—C4—C5	118.7 (17)	H8AB—C8B—H8BB	108.3
C3—C4—H4	120.7	C8B—C9B—C10B	105 (7)
C5—C4—H4	120.7	C8B—C9B—H9AB	110.9
C4—C5—C6	119.8 (17)	C10B—C9B—H9AB	110.9
C4—C5—H5	120.1	C8B—C9B—H9BB	110.9
C6—C5—H5	120.1	C10B—C9B—H9BB	110.9
C1—C6—C5	120.4 (17)	H9AB—C9B—H9BB	108.9
C1—C6—H6	119.8	C9B—C10B—O1	101 (7)
C5—C6—H6	119.8	C9B—C10B—H0AB	111.7
O1—C7A—C8A	108.6 (19)	O1—C10B—H0AB	111.7
O1—C7A—H7AA	110.0	C9B—C10B—H0BB	111.7
C8A—C7A—H7AA	110.0	O1—C10B—H0BB	111.7
O1—C7A—H7BA	110.0	H0AB—C10B—H0BB	109.4

C6—C1—C2—C3	1 (3)	C10B—O1—C10A—C9A	170 (51)
Se1—C1—C2—C3	−176.1 (14)	C7B—O1—C10A—C9A	3 (5)
C1—C2—C3—C4	−2 (3)	Tm1—O1—C10A—C9A	−163.7 (15)
C2—C3—C4—C5	2 (3)	C8A—C9A—C10A—O1	−37 (4)
C3—C4—C5—C6	−2 (3)	C10A—O1—C7B—C8B	1 (7)
C2—C1—C6—C5	−1 (2)	C7A—O1—C7B—C8B	−103 (15)
Se1—C1—C6—C5	176.5 (12)	C10B—O1—C7B—C8B	−2 (11)
C4—C5—C6—C1	1 (3)	Tm1—O1—C7B—C8B	168 (5)
C10A—O1—C7A—C8A	3 (3)	O1—C7B—C8B—C9B	23 (10)
C10B—O1—C7A—C8A	−3 (10)	C7B—C8B—C9B—C10B	−37 (14)
C7B—O1—C7A—C8A	85 (15)	C8B—C9B—C10B—O1	32 (14)
Tm1—O1—C7A—C8A	−171.5 (13)	C10A—O1—C10B—C9B	−33 (38)
O1—C7A—C8A—C9A	−27 (2)	C7A—O1—C10B—C9B	1 (15)
C7A—C8A—C9A—C10A	37 (3)	C7B—O1—C10B—C9B	−19 (14)
C7A—O1—C10A—C9A	21 (4)	Tm1—O1—C10B—C9B	170 (7)

Symmetry codes: (i) −x+y+1, −x+1, z; (ii) −y+1, x−y, z.

Experimental details

Crystal data
Chemical formula	[Tm(C₆H₅Se)₃(C₄H₈O)₃]
M_r	853.42
Crystal system, space group	Trigonal, P31c
Temperature (K)	120
a, c (Å)	15.277 (2), 7.8708 (16)
V (Å³)	1590.9 (6)
Z	2
Radiation type	Mo Kα
µ (mm⁻¹)	6.25
Crystal size (mm)	0.40 × 0.20 × 0.10

Data collection
Diffractometer	Bruker–Nonius KappaCCD diffractometer
Absorption correction	Multi-scan (XPREP in SHELXTL; Sheldrick, 2008)
T_min, T_max	0.189, 0.574
No. of measured, independent and observed [I > 2σ(I)] reflections	5660, 2151, 2053
R_int	0.053
(sin θ/λ)_max (Å⁻¹)	0.662

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.038, 0.087, 1.10
No. of reflections	2151
No. of parameters	127
No. of restraints	9
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.76, −1.43
Absolute structure	Flack x determined using 812 quotients [(I⁺)-(I^-)]/[(I⁺)+(I^-)] (Parsons & Flack, 2004)
Absolute structure parameter	−0.03 (3)

Computer programs: COLLECT (Bruker, 2008), DENZO-SMN (Otwinowski & Minor, 1997), SIR92 (Altomare et al., 1993), SHELXL2013 (Sheldrick, 2008), DIAMOND (Brandenburg, 2006), WinGX (Farrugia, 2012).

Acknowledgements

EMT thanks the Jenni and Antti Wihuri Foundation for financial support.

References

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Volume 70| Part 11| November 2014| Page m389

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metal-organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

Crystal structure of tris­­(phenyl­seleno­lato-κSe)tris­­(tetra­hydro­furan-κO)thulium(III)

1. Related literature

2. Experimental

2.1. Crystal data

2.2. Data collection

2.3. Refinement

Supporting information

Acknowledgements

References

metal-organic compounds

Crystal structure of tris(phenylselenolato-κSe)tris(tetrahydrofuran-κO)thulium(III)