[Y(HSeO3)(SeO3)(H2O)]·H2O

Harrison, W.T.A.

doi:10.1107/S1600536806023051

inorganic compounds

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 62| Part 7| July 2006| Pages i152-i154

https://doi.org/10.1107/S1600536806023051

[Y(HSeO₃)(SeO₃)(H₂O)]·H₂O

William T. A. Harrison ^a ^*

^aDepartment of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland
^*Correspondence e-mail: w.harrison@abdn.ac.uk

(Received 13 June 2006; accepted 15 June 2006; online 21 June 2006)

The title compound, aqua(hydrogen trioxoselenato)(trioxoselenato)yttrium(III) monohydrate, which is isostructural with its samarium(III) and neodymium(III) analogues, contains YO₈, SeO₃ and HSeO₃ coordination polyhedra, which fuse together by corner- and edge-sharing, resulting in a layered structure. A network of O—H⋯O hydrogen bonds helps to consolidate the crystal packing.

Comment

The title compound, (I) (Fig. 1), is isostructural with its samarium (Koskenlinna et al., 1994 ) and neodymium (de Pedro et al., 1994 ) analogues.

Compound (I) contains both (SeO₃)²⁻ selenite and (HSeO₃)⁻ hydrogen selenite anions. The unobserved lone pair of electrons of the Se^IV species gives rise to the characteristic pyramidal shape of these oxo-anions. As seen previously (Koskenlinna et al., 1994), the Se–OH vertex [1.745 (4) Å] in (I) is longer than the Se—O bonds [mean = 1.690 (15) Å] (Table 1). The Se atoms are displaced from the planes of their three attached oxygen atoms by 0.804 (2) and 0.814 (2) Å for Se1 and Se2, respectively. In terms of bond angles, the angle of the edge-sharing (to Y) O1–Se1–O2 grouping is significantly more acute [92.37 (16)°] than the other O–Se–O sets (mean = 100.4°).

The yttrium cation in (I) is surrounded by eight oxygen atoms, one of which (O7) is part of a water molecule, with a fairly narrow spread of distances [2.258 (3)–2.419 (3) Å; mean = 2.36 (5) Å]. The next nearest O atom has a distance of Y—O4ⁱ = 3.872 (3) Å [symmetry code: (i) 1 − x, $[{1\over 2}]$ + y, $[{1\over 2}]$ − z]. The YO₈ grouping could be described as a highly distorted square antiprism (Fig. 2) or possibly as irregular. Atoms O1, O2, O4 and O7 conform well to a square [r.m.s. deviation from the mean plane = 0.041 Å; O1⋯O4 = 3.915 (5) Å and O2⋯O7 = 3.988 (5) Å], whereas the nominal O1ⁱⁱⁱ, O2ⁱⁱ, O3ⁱ and O5ⁱⁱ (see Table 1 for symmetry codes) square is grossly distorted [r.m.s. deviation from the mean plane = 0.399 Å; O1ⁱⁱⁱ⋯O2ⁱⁱ = 4.440 (5) Å and O3ⁱ⋯O5ⁱⁱ = 3.339 (5) Å]. The Y atom is displaced by 1.3249 (18) Å from the first plane, and 1.1900 (18) Å from the second. The interplanar dihedral angle is 1.8 (2)°. Atoms O3, O4 and O5 are bicoordinate to Y and Se (mean Y—O—Se = 124.2°), whilst O1 and O2 are tricoordinate to one Se and two Y atoms (bond angle sums = 343.5 and 349.0°, respectively). O6 is part of a terminal Se–OH vertex and O7 and O8 are parts of water molecules.

The polyhedral connectivity in (I) (Fig. 3) involves chains of YO₈ groups sharing edges, via O1 + O2ⁱⁱ and O1ⁱⁱⁱ + O2 pairs, to result in chains propagating along [010]. The relatively acute O1—Y—O2ⁱⁱ and O1ⁱⁱⁱ—Y—O2 bond angles of 67.81 (12) and 68.02 (11)° respectively, correlate with this polyhedron-fusing role. The Y⋯Yⁱⁱ separation within the chain is 3.9668 (5) Å. The Y/O chains are cross-linked in the [100] direction by the Se1O₃ groups, involving the edge-sharing motif noted above. Finally, the (HSe2O₃)⁻ groups decorate and reinforce the [010] Y/O chains, resulting in a structure with layered character.

The hydrogen-bonding scheme in (I) involves all the H atoms participating in O—H⋯O links (Table 2). The Y-bonded water molecule (O7) makes a hydrogen bond to an adjacent YO₈ group in the same sheet (via H2) and to the inter-sheet water molecule (via H1). The hydrogen selenite anion makes the only direct inter-sheet hydrogen bond (Fig. 4). As well as accepting an hydrogen bond, the non-coordinated water molecule (O8) makes two hydrogen bonds to the same adjacent sheet.

The average metal–oxygen distances in these isostructural phases are Y—O = 2.36 (5) Å, Sm—O = 2.42 Å and Nd—O = 2.45 Å. This pattern is exactly consistent with the differences in the eight-coordinate atomic radii (Shannon, 1976 ) of Y³⁺ (1.019 Å), Sm³⁺ (1.079 Å) and Nd³⁺ (1.109 Å).

Figure 1
The asymmetric unit of (I) expanded to show the Y atom coordination (70% displacement ellipsoids; spheres of arbitrary radius for the H atoms). Symmetry codes as in Table 1

Figure 2
Detail of (I) showing the Y atom coordination with O⋯O contacts < 3.3 Å shown as lines (50% displacement ellipsoids). Symmetry codes as in Table 1

Figure 3
View down [001] of a layer in (I) in polyhedral representation, showing the [010] chains of edge-sharing YO₈ groups cross-linked by the Se1 atoms. Colour key: YO₈ groups green, Se atoms blue, O atoms red, H atoms grey.

Figure 4
The packing in (I), viewed down [010]. Drawing convention as in Fig. 3

, with the H⋯O portions of the hydrogen bonds highlighted in yellow.

Experimental

A mixture of YCl₃·6H₂O (0.83 g, 2.74 mmol), SeO₂ (0.5 g, 4.5 mmol) and water (10 ml) was sealed in a 23 ml Teflon-lined autoclave and heated to 433 K for three days, followed by cooling to room temperature over a few hours. Product recovery by vacuum filtration and rinsing with water and acetone led to 0.173 g (16.6% based on Y) of tiny colourless bars and rods of (I).

Crystal data

[Y(HSeO₃)(SeO₃)(H₂O)]·H₂O
M_r = 379.87
Orthorhombic, P 2₁ 2₁ 2₁
a = 6.5485 (3) Å
b = 6.8987 (2) Å
c = 16.2022 (7) Å
V = 731.95 (5) Å³
Z = 4
D_x = 3.447 Mg m⁻³
Mo Kα radiation
μ = 17.92 mm⁻¹
T = 120 (2) K
Rod, colourless
0.14 × 0.03 × 0.02 mm

Data collection

Nonius KappaCCD diffractometer
ω and φ scans
Absorption correction: multi-scan (SADABS; Bruker, 1999 ) T_min = 0.188, T_max = 0.716
6897 measured reflections
1667 independent reflections
1523 reflections with I > 2σ(I)
R_int = 0.054
θ_max = 27.5°

Refinement

Refinement on F²
R[F² > 2σ(F²)] = 0.029
wR(F²) = 0.053
S = 1.05
1667 reflections
101 parameters
H-atom parameters constrained
w = 1/[σ²(F_o²) + 0.7811P] where P = (F_o² + 2F_c²)/3
(Δ/σ)_max < 0.001
Δρ_max = 0.63 e Å⁻³
Δρ_min = −0.72 e Å⁻³
Absolute structure: Flack (1983 ), 664 Friedel pairs
Flack parameter: 0.646 (11)

Table 1
Selected geometric parameters (Å, °)

Y—O3ⁱ	2.258 (3)
Y—O7	2.346 (3)
Y—O5ⁱⁱ	2.347 (3)
Y—O4	2.367 (3)
Y—O2ⁱⁱ	2.372 (3)
Y—O1ⁱⁱⁱ	2.376 (4)
Y—O2	2.402 (4)
Y—O1	2.419 (3)
Se1—O3	1.680 (3)
Se1—O1	1.701 (3)
Se1—O2	1.710 (3)
Se2—O4	1.672 (3)
Se2—O5	1.689 (3)
Se2—O6	1.745 (4)

Se1—O1—Yⁱⁱ	130.66 (18)
Se1—O1—Y	101.19 (15)
Yⁱⁱ—O1—Y	111.66 (13)
Se1—O2—Yⁱⁱⁱ	135.03 (18)
Se1—O2—Y	101.58 (15)
Yⁱⁱⁱ—O2—Y	112.41 (13)
Se1—O3—Y^iv	130.39 (19)
Se2—O4—Y	117.18 (17)
Se2—O5—Yⁱⁱⁱ	124.96 (17)
Symmetry codes: (i) x-1, y, z; (ii) $[-x+1, y+{\script{1\over 2}}, -z+{\script{1\over 2}}]$ ; (iii) $[-x+1, y-{\script{1\over 2}}, -z+{\script{1\over 2}}]$ ; (iv) x+1, y, z.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O6—H1⋯O4^v	0.82	1.92	2.712 (5)	164
O7—H2⋯O5^vi	0.92	1.93	2.806 (5)	159
O7—H3⋯O8	0.86	1.82	2.644 (5)	163
O8—H4⋯O3^vii	0.94	1.93	2.874 (5)	179
O8—H5⋯O5^viii	0.93	2.03	2.964 (5)	179
Symmetry codes: (v) $[x+{\script{1\over 2}}, -y+{\script{1\over 2}}, -z+1]$ ; (vi) x, y+1, z; (vii) $[x-{\script{1\over 2}}, -y+{\script{3\over 2}}, -z+1]$ ; (viii) $[x-{\script{1\over 2}}, -y+{\script{1\over 2}}, -z+1]$ .

The crystal studied was an inversion twin with volume fractions of 0.354 (11):0.646 (11) for the component reported in the tables and its enantiomer, respectively. All the H atoms were located in difference maps and refined as riding in their as-found relative positions, with U_iso(H) = 1.2U_eq (carrier).

Data collection: COLLECT (Nonius, 1998 ); cell refinement: SCALEPACK (Otwinowski & Minor, 1997 ); data reduction: SCALEPACK and DENZO (Otwinowski & Minor, 1997), and SORTAV (Blessing, 1995 ); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 (Farrugia, 1997 ) and ATOMS (Shape Software, 2005 ); software used to prepare material for publication: SHELXL97.

Supporting information

Crystal structure: contains datablocks I, global. DOI: https://doi.org/10.1107/S1600536806023051/wm2020sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536806023051/wm2020Isup2.hkl

Computing details top

Data collection: COLLECT (Nonius, 1998); cell refinement: SCALEPACK (Otwinowski & Minor, 1997); data reduction: SCALEPACK and DENZO (Otwinowski & Minor, 1997), and SORTAV (Blessing, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 (Farrugia, 1997) and ATOMS (Shape Software, 2005); software used to prepare material for publication: SHELXL97.

aqua(hydrogen trioxoselenato)(trioxoselenato)yttrium(III) monohydrate top

Crystal data top

[Y(HSeO₃)(SeO₃)(H₂O)]·H₂O	F(000) = 704
M_r = 379.87	D_x = 3.447 Mg m⁻³
Orthorhombic, P2₁2₁2₁	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ac 2ab	Cell parameters from 1002 reflections
a = 6.5485 (3) Å	θ = 2.9–27.5°
b = 6.8987 (2) Å	µ = 17.92 mm⁻¹
c = 16.2022 (7) Å	T = 120 K
V = 731.95 (5) Å³	Rod, colourless
Z = 4	0.14 × 0.03 × 0.02 mm

Data collection top

Nonius KappaCCD diffractometer	1667 independent reflections
Radiation source: fine-focus sealed tube	1523 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.054
ω and φ scans	θ_max = 27.5°, θ_min = 3.2°
Absorption correction: multi-scan (SADABS; Bruker, 1999)	h = −8→8
T_min = 0.188, T_max = 0.716	k = −8→8
6897 measured reflections	l = −21→15

Refinement top

Refinement on F²	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: difference Fourier map
R[F² > 2σ(F²)] = 0.029	H-atom parameters constrained
wR(F²) = 0.053	w = 1/[σ²(F_o²) + 0.7811P] where P = (F_o² + 2F_c²)/3
S = 1.05	(Δ/σ)_max < 0.001
1667 reflections	Δρ_max = 0.63 e Å⁻³
101 parameters	Δρ_min = −0.72 e Å⁻³
12 restraints	Absolute structure: Flack (1983), 664 Friedel pairs
Primary atom site location: structure-invariant direct methods	Absolute structure parameter: 0.646 (11)

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	U_iso*/U_eq
Y	0.37562 (8)	0.61129 (7)	0.28358 (3)	0.00582 (13)
Se1	0.84646 (8)	0.61632 (7)	0.22729 (3)	0.00611 (12)
Se2	0.63756 (8)	0.31562 (7)	0.42030 (3)	0.00760 (13)
O1	0.6887 (5)	0.7917 (5)	0.2645 (2)	0.0068 (8)
O2	0.6860 (5)	0.4352 (5)	0.2586 (2)	0.0086 (8)
O3	1.0328 (5)	0.6073 (6)	0.2985 (2)	0.0088 (8)
O4	0.4060 (5)	0.4055 (5)	0.3998 (2)	0.0090 (8)
O5	0.6446 (6)	0.1143 (5)	0.3611 (2)	0.0095 (7)
O6	0.5716 (5)	0.2051 (6)	0.5135 (2)	0.0120 (9)
H1	0.6766	0.1951	0.5407	0.014*
O7	0.3831 (6)	0.8068 (5)	0.4020 (2)	0.0130 (9)
H2	0.4918	0.8906	0.3964	0.016*
H3	0.3722	0.7899	0.4544	0.016*
O8	0.3927 (7)	0.6896 (6)	0.5574 (2)	0.0251 (11)
H4	0.4394	0.7574	0.6041	0.030*
H5	0.3147	0.5941	0.5826	0.030*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Y	0.0050 (2)	0.0058 (3)	0.0067 (3)	0.0001 (2)	−0.0004 (2)	0.0005 (2)
Se1	0.0052 (2)	0.0064 (3)	0.0067 (3)	−0.0002 (2)	−0.0001 (2)	−0.0003 (2)
Se2	0.0089 (3)	0.0070 (3)	0.0069 (3)	0.0004 (2)	−0.0007 (3)	0.0000 (2)
O1	0.0053 (15)	0.0052 (16)	0.0099 (17)	−0.0006 (13)	0.0047 (14)	−0.0030 (14)
O2	0.0063 (18)	0.009 (2)	0.011 (2)	−0.0021 (15)	−0.0018 (15)	0.0033 (14)
O3	0.0070 (16)	0.0138 (18)	0.0055 (17)	−0.0006 (14)	−0.0019 (13)	−0.0008 (15)
O4	0.0093 (19)	0.0096 (19)	0.0080 (19)	0.0058 (16)	−0.0002 (16)	0.0036 (16)
O5	0.0153 (19)	0.0048 (17)	0.0083 (18)	0.0042 (19)	−0.0025 (18)	−0.0017 (14)
O6	0.012 (2)	0.016 (2)	0.008 (2)	0.0011 (18)	0.0005 (17)	0.0051 (17)
O7	0.018 (2)	0.0153 (19)	0.006 (2)	−0.0059 (19)	0.0037 (18)	−0.0006 (16)
O8	0.036 (3)	0.033 (2)	0.007 (2)	−0.022 (2)	−0.004 (2)	−0.0003 (18)

Geometric parameters (Å, º) top

Y—O3ⁱ	2.258 (3)	Se2—O4	1.672 (3)
Y—O7	2.346 (3)	Se2—O5	1.689 (3)
Y—O5ⁱⁱ	2.347 (3)	Se2—O6	1.745 (4)
Y—O4	2.367 (3)	O1—Yⁱⁱ	2.376 (4)
Y—O2ⁱⁱ	2.372 (3)	O2—Yⁱⁱⁱ	2.372 (3)
Y—O1ⁱⁱⁱ	2.376 (4)	O3—Y^iv	2.258 (3)
Y—O2	2.402 (4)	O5—Yⁱⁱⁱ	2.347 (3)
Y—O1	2.419 (3)	O6—H1	0.8198
Y—Yⁱⁱ	3.9668 (5)	O7—H2	0.9222
Y—Yⁱⁱⁱ	3.9668 (5)	O7—H3	0.8604
Se1—O3	1.680 (3)	O8—H4	0.9403
Se1—O1	1.701 (3)	O8—H5	0.9289
Se1—O2	1.710 (3)

O3ⁱ—Y—O7	86.57 (13)	O2ⁱⁱ—Y—O1	67.81 (12)
O3ⁱ—Y—O5ⁱⁱ	92.92 (13)	O1ⁱⁱⁱ—Y—O1	125.88 (8)
O7—Y—O5ⁱⁱ	144.37 (11)	O2—Y—O1	61.40 (11)
O3ⁱ—Y—O4	89.49 (12)	Yⁱⁱ—Y—Yⁱⁱⁱ	120.81 (3)
O7—Y—O4	72.08 (12)	O3—Se1—O1	102.95 (17)
O5ⁱⁱ—Y—O4	143.55 (11)	O3—Se1—O2	102.44 (17)
O3ⁱ—Y—O2ⁱⁱ	82.73 (13)	O1—Se1—O2	92.37 (16)
O7—Y—O2ⁱⁱ	72.40 (12)	O4—Se2—O5	102.52 (17)
O5ⁱⁱ—Y—O2ⁱⁱ	72.20 (11)	O4—Se2—O6	96.28 (17)
O4—Y—O2ⁱⁱ	144.00 (12)	O5—Se2—O6	97.98 (18)
O3ⁱ—Y—O1ⁱⁱⁱ	81.21 (13)	Se1—O1—Yⁱⁱ	130.66 (18)
O7—Y—O1ⁱⁱⁱ	143.63 (12)	Se1—O1—Y	101.19 (15)
O5ⁱⁱ—Y—O1ⁱⁱⁱ	70.78 (12)	Yⁱⁱ—O1—Y	111.66 (13)
O4—Y—O1ⁱⁱⁱ	73.68 (12)	Se1—O2—Yⁱⁱⁱ	135.03 (18)
O2ⁱⁱ—Y—O1ⁱⁱⁱ	138.57 (12)	Se1—O2—Y	101.58 (15)
O3ⁱ—Y—O2	148.54 (13)	Yⁱⁱⁱ—O2—Y	112.41 (13)
O7—Y—O2	114.26 (13)	Se1—O3—Y^iv	130.39 (19)
O5ⁱⁱ—Y—O2	83.34 (12)	Se2—O4—Y	117.18 (17)
O4—Y—O2	76.08 (11)	Se2—O5—Yⁱⁱⁱ	124.96 (17)
O2ⁱⁱ—Y—O2	124.88 (9)	Se2—O6—H1	107.1
O1ⁱⁱⁱ—Y—O2	68.02 (11)	Y—O7—H2	107.2
O3ⁱ—Y—O1	149.65 (13)	Y—O7—H3	136.7
O7—Y—O1	77.95 (12)	H2—O7—H3	104.3
O5ⁱⁱ—Y—O1	85.16 (12)	H4—O8—H5	100.2
O4—Y—O1	109.83 (12)

O3—Se1—O1—Yⁱⁱ	109.1 (2)	O4—Y—O2—Se1	−134.90 (16)
O2—Se1—O1—Yⁱⁱ	−147.5 (2)	O2ⁱⁱ—Y—O2—Se1	12.59 (12)
Y—Se1—O1—Yⁱⁱ	−131.7 (3)	O1ⁱⁱⁱ—Y—O2—Se1	147.35 (18)
O3—Se1—O1—Y	−119.12 (16)	O1—Y—O2—Se1	−12.68 (13)
O2—Se1—O1—Y	−15.78 (16)	Yⁱⁱ—Y—O2—Se1	0.83 (13)
O3ⁱ—Y—O1—Se1	−159.82 (18)	Yⁱⁱⁱ—Y—O2—Se1	150.0 (2)
O7—Y—O1—Se1	139.23 (18)	O3ⁱ—Y—O2—Yⁱⁱⁱ	10.2 (3)
O5ⁱⁱ—Y—O1—Se1	−72.32 (16)	O7—Y—O2—Yⁱⁱⁱ	137.81 (14)
O4—Y—O1—Se1	73.53 (17)	O5ⁱⁱ—Y—O2—Yⁱⁱⁱ	−74.53 (14)
O2ⁱⁱ—Y—O1—Se1	−145.06 (19)	O4—Y—O2—Yⁱⁱⁱ	75.15 (14)
O1ⁱⁱⁱ—Y—O1—Se1	−10.28 (14)	O2ⁱⁱ—Y—O2—Yⁱⁱⁱ	−137.36 (18)
O2—Y—O1—Se1	12.73 (13)	O1ⁱⁱⁱ—Y—O2—Yⁱⁱⁱ	−2.60 (13)
Yⁱⁱ—Y—O1—Se1	−142.5 (2)	O1—Y—O2—Yⁱⁱⁱ	−162.63 (19)
Yⁱⁱⁱ—Y—O1—Se1	3.21 (15)	Se1—Y—O2—Yⁱⁱⁱ	−150.0 (2)
O3ⁱ—Y—O1—Yⁱⁱ	−17.3 (3)	Yⁱⁱ—Y—O2—Yⁱⁱⁱ	−149.12 (12)
O7—Y—O1—Yⁱⁱ	−78.28 (15)	O1—Se1—O3—Y^iv	−131.1 (3)
O5ⁱⁱ—Y—O1—Yⁱⁱ	70.17 (14)	O2—Se1—O3—Y^iv	133.5 (3)
O4—Y—O1—Yⁱⁱ	−143.99 (14)	Y—Se1—O3—Y^iv	−179.21 (17)
O2ⁱⁱ—Y—O1—Yⁱⁱ	−2.57 (12)	O5—Se2—O4—Y	−86.34 (19)
O1ⁱⁱⁱ—Y—O1—Yⁱⁱ	132.20 (18)	O6—Se2—O4—Y	174.02 (19)
O2—Y—O1—Yⁱⁱ	155.21 (19)	O3ⁱ—Y—O4—Se2	171.68 (19)
O3—Se1—O2—Yⁱⁱⁱ	−101.2 (3)	O7—Y—O4—Se2	−101.8 (2)
O1—Se1—O2—Yⁱⁱⁱ	155.0 (2)	O5ⁱⁱ—Y—O4—Se2	77.5 (3)
Y—Se1—O2—Yⁱⁱⁱ	139.1 (3)	O2ⁱⁱ—Y—O4—Se2	−111.5 (2)
O3—Se1—O2—Y	119.73 (15)	O1ⁱⁱⁱ—Y—O4—Se2	90.69 (19)
O1—Se1—O2—Y	15.91 (16)	O2—Y—O4—Se2	19.92 (18)
O3ⁱ—Y—O2—Se1	160.10 (18)	O1—Y—O4—Se2	−32.2 (2)
O7—Y—O2—Se1	−72.24 (17)	O4—Se2—O5—Yⁱⁱⁱ	62.4 (2)
O5ⁱⁱ—Y—O2—Se1	75.42 (15)	O6—Se2—O5—Yⁱⁱⁱ	160.7 (2)

Symmetry codes: (i) x−1, y, z; (ii) −x+1, y+1/2, −z+1/2; (iii) −x+1, y−1/2, −z+1/2; (iv) x+1, y, z.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O6—H1···O4^v	0.82	1.92	2.712 (5)	164
O7—H2···O5^vi	0.92	1.93	2.806 (5)	159
O7—H3···O8	0.86	1.82	2.644 (5)	163
O8—H4···O3^vii	0.94	1.93	2.874 (5)	179
O8—H5···O5^viii	0.93	2.03	2.964 (5)	179

Symmetry codes: (v) x+1/2, −y+1/2, −z+1; (vi) x, y+1, z; (vii) x−1/2, −y+3/2, −z+1; (viii) x−1/2, −y+1/2, −z+1.

Acknowledgements

We thank that EPSRC National Crystallography Service (University of Southampton) for the data collection.

References

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Volume 62| Part 7| July 2006| Pages i152-i154

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