catena-Poly[[diaqua­strontium]-bis­(μ-quinoline-3-carboxyl­ato)]

Abstract

The title compound, [Sr(C₁₀H₆NO₂)₂(H₂O)₂]_n, contains an eight-coordinate Sr^II ion displaying a distorted square-anti­prismatic geometry, two quinoline-3-carboxyl­ate ligands and two terminal water mol­ecules. The Sr^II atom is surrounded by six carboxyl­ate O atoms from four separate quinoline-3-carboxyl­ate ligands and two O atoms from two coordinated water mol­ecules. The bridging carboxyl­ate O atoms [Sr—O = 2.498 (3) and 2.495 (3) Å] link Sr^II atoms, forming a chain substructure extending along the c axis. The chains are linked by O—H⋯N and O—H⋯O hydrogen bonds, giving a three-dimensional framework structure

Related literature

For a similar structure, see: Miao et al. (2010 ▶). For structures with quinoline-3-carboxyl­ate ligands, see: Okabe & Muranishi (2003a ▶,b ▶); Zevaco et al. (1998 ▶). For quinoline-3-carboxyl­ate ligands in a range of metal complexes, see: Haendler (1986 ▶, 1996 ▶); Hu et al. (2007 ▶); Martell & Smith (1974 ▶); Odoko et al. (2001 ▶); Okabe & Koizumi (1997 ▶); Okabe & Makino (1998 ▶, 1999 ▶); Okabe & Muranishi (2002 ▶).

Experimental

Crystal data

• [Sr(C₁₀H₆NO₂)₂(H₂O)₂]

• M _r = 467.97

• Monoclinic,

• a = 16.121 (3) Å

• b = 15.568 (3) Å

• c = 7.9607 (16) Å

• β = 97.42 (3)°

• V = 1981.2 (7) ų

• Z = 4

• Mo Kα radiation

• μ = 2.76 mm⁻¹

• T = 293 K

• 0.30 × 0.28 × 0.22 mm

Data collection

• Bruker APEXII area-detector diffractometer

• Absorption correction: multi-scan (SADABS; Bruker, 2001 ▶) T _min = 0.491, T _max = 0.582

• 15104 measured reflections

• 3551 independent reflections

• 2571 reflections with I > 2σ(I)

• R _int = 0.047

Refinement

• R[F ² > 2σ(F ²)] = 0.037

• wR(F ²) = 0.112

• S = 1.19

• 3551 reflections

• 274 parameters

• 6 restraints

• H atoms treated by a mixture of independent and constrained refinement

• Δρ_max = 0.79 e Å⁻³

• Δρ_min = −1.19 e Å⁻³

Data collection: APEX2 (Bruker, 2004 ▶); cell refinement: SAINT (Bruker, 2002 ▶); data reduction: SAINT; 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: SHELXL97.

Supplementary Material

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1W—H2W⋯O2i	0.84 (1)	1.97 (2)	2.798 (5)	168 (6)
O1W—H1W⋯N1ii	0.84 (1)	2.01 (1)	2.846 (6)	175 (6)
O2W—H3W⋯O3iii	0.84 (1)	1.99 (2)	2.810 (5)	166 (5)
O2W—H4W⋯N2iv	0.84 (1)	2.01 (1)	2.846 (6)	176 (5)

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .

supplementary crystallographic information

Comment

Crystal engineering of mental-organic complexes is a very active research field. It is well known that organic ligands play a crucial role in the design and construction of desirable frameworks. Quinoline-2-carboxylic acid is a tryptophan metabolite and it is known to be a chelator of transition metal ions (Martell & Smith, 1974). The crystal structures of its metal complexes have been determined for several metal ions, including Fe^II (Okabe & Makino, 1998; Okabe & Muranishi (2003a), Zn^II (Zevaco et al., 1998; Okabe & Muranishi (2003b), Ni^II (Odoko et al., 2001), V^IV (Okabe & Muranishi, 2002), Cu^II (Haendler, 1986), Mn^II (Haendler, 1986; Okabe & Koizumi, 1997) and Co^II (Okabe & Makino, 1999). However, to the best of our knowledge, the complexes based on the quinoline-3-carboxylate ligand are still largely unexplored(Hu et al., 2007), In our previous study, we obtained a new Ca^II complex with quinoline-3-carboxylate ligand (Miao et al., 2010). In this paper, we will present the synthesis and crystal structure of a new Sr(II) complex assembled from SrCl₂ and quinoline-3-carboxylate ligand.

As illustrated in Fig. 1, the title complex [Sr(C₁₀H₆NO₂)₂ (H₂O)₂]_n, contains a eight-coordinate Sr^II ion, two quinoline-3-carboxylate ligands and two terminal water molecules. Each Sr^II displays a distorted square-antiprismatic geametry defined by six carboxylate O atoms, from four separate quinoline-3-carboxylate ligands and two oxygen atoms from two aqual ligands. It is noted that the quinoline-3-carboxylate only one coordination mode in the title complex: each adopts bidentate chelating and bridging coordination fashion to connect two adjacent Sr^II ions. The bridging carboxylate O atoms (O1 and O4) [Sr—O, 2.498 (3), 2.495 (3) Å] link separate Sr^II centres, forming a one-dimensional chain substructure extended along c (Fig.2). The chains are linked together by O—H···N and O—H···O hydrogen bonds (Table 1) giving a three-dimensional framework structure (Fig.3).

Experimental

A mixture of SrCl₂ (0.05 g, 0.2 mmol) and quinoline-3-carboxylic acid (0.04 g, 0.2 mmol) in 12 ml of distilled water was sealed in an autoclave equipped with a Teflon liner (20 ml) and then heated at 394 K for 2 days. Crystals of the title compound were obtained by slow evaporation of the solvent at room temperature.

Refinement

Water H atoms were located in a difference Fourier map and were allowed to ride on the parent atom, with U_iso(H) = 1.5U_eq(O). Carboxyl H atoms were located in a difference map and refined with distance restraints, U_iso(H) = 1.5U_eq(O). Other H atoms were placed at calculated positions and were treated as riding on parent atoms with C—H = 0.96 (methyl), 0.97 (methylene) and N—H = 0.86 Å, U_iso(H) = 1.2 or 1.5U_eq(C,N). The propyl groups of H₃pimda are disordered over two sites with refined occupancies of 0.768 (6):0.232 (6) and 0.642 (8):0.358 (8). C—C distance restraints of disordered components were applied. The O3W water molecule is located close to an inversion center, its occupancy factor was refined to 0.49 (1) and was fixed as 0.5 at the final refinements.

Figures

Fig. 1.

The structure of the title compound, showing the atomic numbering scheme. Non-H atoms are shown with 30% probability displacement ellipsoids.

Fig. 2.

The one-dimensional chain substructure of (I) extending along the c axis.

Fig. 3.

The three-dimensional hydrogen-bonded structure of (I).

Crystal data

[Sr(C10H6NO2)2(H2O)2]	Z = 4
Mr = 467.97	F(000) = 944
Monoclinic, P21/c	Dx = 1.569 Mg m−3
Hall symbol: -P 2ybc	Mo Kα radiation, λ = 0.71073 Å
a = 16.121 (3) Å	µ = 2.76 mm−1
b = 15.568 (3) Å	T = 293 K
c = 7.9607 (16) Å	Block, colorless
β = 97.42 (3)°	0.30 × 0.28 × 0.22 mm
V = 1981.2 (7) Å3

Data collection

Bruker APEXII area-detector diffractometer	3551 independent reflections
Radiation source: fine-focus sealed tube	2571 reflections with I > 2σ(I)
graphite	Rint = 0.047
φ and ω scan	θmax = 25.2°, θmin = 3.0°
Absorption correction: multi-scan (SADABS; Bruker, 2001)	h = −19→19
Tmin = 0.491, Tmax = 0.582	k = −18→18
15104 measured reflections	l = −9→9

Refinement

Refinement on F2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.037	Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.112	H atoms treated by a mixture of independent and constrained refinement
S = 1.19	w = 1/[σ2(Fo2) + (0.0192P)2 + 6.2168P] where P = (Fo2 + 2Fc2)/3
3551 reflections	(Δ/σ)max < 0.001
274 parameters	Δρmax = 0.79 e Å−3
6 restraints	Δρmin = −1.19 e Å−3

Special details

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 (Ų)

	x	y	z	Uiso*/Ueq
C1	0.3837 (3)	0.4533 (3)	0.1246 (6)	0.0332 (11)
C2	0.3401 (3)	0.5067 (3)	0.0107 (6)	0.0365 (12)
H2	0.2915	0.4874	−0.0540	0.044*
C3	0.3245 (4)	0.6518 (4)	−0.1203 (8)	0.0556 (16)
H3	0.2742	0.6365	−0.1840	0.067*
C4	0.3558 (5)	0.7327 (4)	−0.1338 (9)	0.0653 (19)
H4	0.3263	0.7728	−0.2047	0.078*
C5	0.4321 (5)	0.7549 (4)	−0.0410 (8)	0.0629 (19)
H5	0.4537	0.8096	−0.0539	0.076*
C6	0.4753 (4)	0.6996 (4)	0.0668 (7)	0.0506 (15)
H6	0.5258	0.7164	0.1281	0.061*
C7	0.4575 (3)	0.4845 (3)	0.2190 (7)	0.0390 (13)
H7	0.4861	0.4485	0.3000	0.047*
C8	0.3683 (3)	0.5914 (3)	−0.0099 (7)	0.0388 (13)
C9	0.4441 (3)	0.6161 (3)	0.0865 (7)	0.0378 (13)
C10	0.3537 (3)	0.3649 (3)	0.1549 (6)	0.0281 (11)
C11	0.0395 (3)	0.3680 (3)	0.3787 (6)	0.0351 (12)
C12	0.0123 (3)	0.3445 (4)	0.5246 (7)	0.0441 (14)
H12	0.0446	0.3078	0.5988	0.053*
C13	−0.0952 (4)	0.3567 (5)	0.7191 (9)	0.077 (2)
H13	−0.0651	0.3203	0.7973	0.093*
C14	−0.1681 (5)	0.3917 (6)	0.7537 (11)	0.093 (3)
H14	−0.1873	0.3802	0.8566	0.112*
C15	−0.2145 (5)	0.4451 (5)	0.6353 (10)	0.076 (2)
H15	−0.2649	0.4679	0.6596	0.091*
C16	−0.1873 (4)	0.4638 (4)	0.4872 (9)	0.0564 (17)
H16	−0.2188	0.4995	0.4098	0.068*
C17	−0.0119 (4)	0.4216 (4)	0.2672 (7)	0.0466 (14)
H17	0.0064	0.4359	0.1646	0.056*
C18	−0.0649 (4)	0.3751 (4)	0.5657 (7)	0.0469 (14)
C19	−0.1115 (4)	0.4298 (4)	0.4488 (7)	0.0439 (14)
C20	0.1226 (3)	0.3383 (3)	0.3324 (7)	0.0358 (12)
N1	0.4882 (3)	0.5620 (3)	0.1991 (6)	0.0419 (11)
N2	−0.0843 (3)	0.4528 (3)	0.2993 (6)	0.0518 (13)
O1	0.3147 (2)	0.3241 (2)	0.0321 (4)	0.0353 (8)
O2	0.3661 (2)	0.3348 (2)	0.3017 (4)	0.0379 (9)
O3	0.1346 (2)	0.3385 (3)	0.1807 (4)	0.0486 (10)
O4	0.1760 (2)	0.3101 (2)	0.4499 (4)	0.0363 (8)
O1W	0.3523 (2)	0.1106 (3)	0.1318 (5)	0.0446 (10)
H2W	0.355 (3)	0.119 (4)	0.028 (2)	0.067*
H1W	0.3984 (18)	0.093 (4)	0.182 (5)	0.067*
O2W	0.1494 (3)	0.1094 (3)	0.3479 (5)	0.0535 (11)
H3W	0.141 (4)	0.117 (3)	0.448 (3)	0.080*
H4W	0.129 (4)	0.063 (2)	0.308 (6)	0.080*
Sr1	0.25124 (3)	0.21557 (3)	0.23948 (6)	0.02880 (15)

Atomic displacement parameters (Ų)

	U11	U22	U33	U12	U13	U23
C1	0.037 (3)	0.030 (3)	0.033 (3)	−0.003 (2)	0.003 (2)	−0.006 (2)
C2	0.033 (3)	0.044 (3)	0.032 (3)	−0.009 (2)	0.004 (2)	−0.004 (2)
C3	0.062 (4)	0.054 (4)	0.048 (4)	−0.007 (3)	−0.006 (3)	0.010 (3)
C4	0.085 (5)	0.049 (4)	0.062 (4)	−0.004 (3)	0.011 (4)	0.022 (3)
C5	0.085 (5)	0.047 (4)	0.059 (4)	−0.022 (4)	0.020 (4)	0.004 (3)
C6	0.057 (4)	0.048 (4)	0.047 (4)	−0.013 (3)	0.009 (3)	−0.004 (3)
C7	0.037 (3)	0.042 (3)	0.036 (3)	−0.006 (2)	−0.004 (2)	−0.004 (2)
C8	0.040 (3)	0.036 (3)	0.042 (3)	−0.005 (2)	0.010 (3)	0.003 (2)
C9	0.041 (3)	0.034 (3)	0.039 (3)	−0.010 (2)	0.009 (3)	−0.005 (2)
C10	0.021 (3)	0.039 (3)	0.027 (3)	−0.002 (2)	0.014 (2)	−0.008 (2)
C11	0.031 (3)	0.042 (3)	0.031 (3)	0.005 (2)	−0.001 (2)	−0.004 (2)
C12	0.036 (3)	0.058 (4)	0.037 (3)	0.009 (3)	0.001 (2)	0.007 (3)
C13	0.056 (5)	0.120 (6)	0.060 (5)	0.024 (4)	0.023 (4)	0.025 (4)
C14	0.074 (6)	0.140 (8)	0.072 (6)	0.022 (5)	0.035 (5)	0.009 (5)
C15	0.049 (4)	0.095 (6)	0.086 (6)	0.016 (4)	0.024 (4)	−0.005 (5)
C16	0.044 (4)	0.061 (4)	0.067 (4)	0.016 (3)	0.016 (3)	−0.009 (3)
C17	0.048 (4)	0.055 (4)	0.037 (3)	0.015 (3)	0.006 (3)	0.009 (3)
C18	0.038 (3)	0.059 (4)	0.044 (4)	0.007 (3)	0.006 (3)	0.005 (3)
C19	0.038 (3)	0.044 (3)	0.051 (4)	0.001 (2)	0.008 (3)	−0.004 (3)
C20	0.037 (3)	0.035 (3)	0.034 (3)	0.004 (2)	0.000 (2)	−0.002 (2)
N1	0.039 (3)	0.046 (3)	0.040 (3)	−0.012 (2)	0.000 (2)	−0.005 (2)
N2	0.044 (3)	0.055 (3)	0.056 (3)	0.019 (2)	0.004 (2)	0.007 (2)
O1	0.042 (2)	0.0345 (19)	0.0281 (19)	−0.0058 (15)	−0.0005 (16)	−0.0059 (14)
O2	0.047 (2)	0.047 (2)	0.0189 (18)	−0.0094 (17)	0.0002 (15)	0.0023 (15)
O3	0.055 (3)	0.068 (3)	0.024 (2)	0.023 (2)	0.0086 (18)	0.0050 (17)
O4	0.033 (2)	0.051 (2)	0.0246 (18)	0.0092 (16)	0.0020 (15)	0.0017 (15)
O1W	0.044 (2)	0.056 (2)	0.033 (2)	0.0159 (19)	0.0027 (18)	0.0034 (18)
O2W	0.066 (3)	0.063 (3)	0.032 (2)	−0.029 (2)	0.009 (2)	−0.0082 (19)
Sr1	0.0294 (3)	0.0317 (2)	0.0244 (3)	−0.0002 (2)	−0.00020 (17)	0.00050 (19)

Geometric parameters (Å, °)

C1—C2	1.357 (7)	C14—C15	1.398 (11)
C1—C7	1.409 (7)	C14—H14	0.9300
C1—C10	1.488 (7)	C15—C16	1.342 (9)
C2—C8	1.412 (7)	C15—H15	0.9300
C2—H2	0.9300	C16—C19	1.400 (8)
C3—C4	1.366 (8)	C16—H16	0.9300
C3—C8	1.412 (8)	C17—N2	1.320 (7)
C3—H3	0.9300	C17—H17	0.9300
C4—C5	1.394 (9)	C18—C19	1.406 (8)
C4—H4	0.9300	C19—N2	1.368 (7)
C5—C6	1.345 (9)	C20—O3	1.247 (6)
C5—H5	0.9300	C20—O4	1.265 (6)
C6—C9	1.411 (7)	O1—Sr1i	2.498 (3)
C6—H6	0.9300	O1—Sr1	2.658 (3)
C7—N1	1.322 (6)	O2—Sr1	2.624 (3)
C7—H7	0.9300	O3—Sr1	2.682 (4)
C8—C9	1.410 (7)	O4—Sr1ii	2.495 (3)
C9—N1	1.362 (7)	O4—Sr1	2.640 (3)
C10—O2	1.251 (6)	O1W—Sr1	2.534 (4)
C10—O1	1.263 (5)	O1W—H2W	0.840 (10)
C11—C12	1.344 (7)	O1W—H1W	0.841 (10)
C11—C17	1.407 (7)	O2W—Sr1	2.557 (4)
C11—C20	1.508 (7)	O2W—H3W	0.839 (10)
C12—C18	1.410 (8)	O2W—H4W	0.838 (10)
C12—H12	0.9300	Sr1—O4i	2.495 (3)
C13—C14	1.356 (10)	Sr1—O1ii	2.498 (3)
C13—C18	1.402 (8)	Sr1—H2W	2.93 (4)
C13—H13	0.9300
C2—C1—C7	118.3 (5)	C20—O3—Sr1	91.3 (3)
C2—C1—C10	121.6 (5)	C20—O4—Sr1ii	160.4 (3)
C7—C1—C10	120.1 (5)	C20—O4—Sr1	92.8 (3)
C1—C2—C8	120.3 (5)	Sr1ii—O4—Sr1	106.78 (12)
C1—C2—H2	119.9	Sr1—O1W—H2W	110 (4)
C8—C2—H2	119.9	Sr1—O1W—H1W	128 (4)
C4—C3—C8	120.2 (6)	H2W—O1W—H1W	111.6 (14)
C4—C3—H3	119.9	Sr1—O2W—H3W	115 (4)
C8—C3—H3	119.9	Sr1—O2W—H4W	132 (3)
C3—C4—C5	119.8 (6)	H3W—O2W—H4W	111.9 (14)
C3—C4—H4	120.1	O4i—Sr1—O1ii	156.08 (11)
C5—C4—H4	120.1	O4i—Sr1—O1W	80.89 (12)
C6—C5—C4	121.9 (6)	O1ii—Sr1—O1W	87.25 (11)
C6—C5—H5	119.1	O4i—Sr1—O2W	87.22 (12)
C4—C5—H5	119.1	O1ii—Sr1—O2W	74.30 (13)
C5—C6—C9	119.9 (6)	O1W—Sr1—O2W	99.57 (14)
C5—C6—H6	120.1	O4i—Sr1—O2	122.32 (11)
C9—C6—H6	120.1	O1ii—Sr1—O2	78.73 (11)
N1—C7—C1	123.7 (5)	O1W—Sr1—O2	92.94 (13)
N1—C7—H7	118.2	O2W—Sr1—O2	149.55 (11)
C1—C7—H7	118.2	O4i—Sr1—O4	117.83 (13)
C9—C8—C2	117.4 (5)	O1ii—Sr1—O4	73.29 (10)
C9—C8—C3	119.1 (5)	O1W—Sr1—O4	160.47 (11)
C2—C8—C3	123.5 (5)	O2W—Sr1—O4	77.18 (13)
N1—C9—C8	122.1 (5)	O2—Sr1—O4	81.79 (11)
N1—C9—C6	118.7 (5)	O4i—Sr1—O1	73.02 (10)
C8—C9—C6	119.2 (5)	O1ii—Sr1—O1	126.30 (13)
O2—C10—O1	122.6 (4)	O1W—Sr1—O1	83.32 (12)
O2—C10—C1	118.7 (4)	O2W—Sr1—O1	159.40 (12)
O1—C10—C1	118.6 (4)	O2—Sr1—O1	49.34 (10)
C12—C11—C17	118.4 (5)	O4—Sr1—O1	106.60 (10)
C12—C11—C20	121.8 (5)	O4i—Sr1—O3	72.94 (12)
C17—C11—C20	119.8 (5)	O1ii—Sr1—O3	122.19 (11)
C11—C12—C18	120.3 (5)	O1W—Sr1—O3	150.27 (11)
C11—C12—H12	119.9	O2W—Sr1—O3	93.09 (14)
C18—C12—H12	119.9	O2—Sr1—O3	89.40 (12)
C14—C13—C18	120.2 (7)	O4—Sr1—O3	48.96 (10)
C14—C13—H13	119.9	O1—Sr1—O3	75.85 (11)
C18—C13—H13	119.9	O4i—Sr1—Sr1ii	150.83 (8)
C13—C14—C15	120.3 (7)	O1ii—Sr1—Sr1ii	38.27 (8)
C13—C14—H14	119.8	O1W—Sr1—Sr1ii	125.06 (9)
C15—C14—H14	119.8	O2W—Sr1—Sr1ii	76.24 (9)
C16—C15—C14	120.9 (7)	O2—Sr1—Sr1ii	73.85 (8)
C16—C15—H15	119.5	O4—Sr1—Sr1ii	35.41 (7)
C14—C15—H15	119.5	O1—Sr1—Sr1ii	118.86 (7)
C15—C16—C19	120.2 (6)	O3—Sr1—Sr1ii	83.99 (8)
C15—C16—H16	119.9	O4i—Sr1—Sr1i	37.81 (8)
C19—C16—H16	119.9	O1ii—Sr1—Sr1i	156.01 (8)
N2—C17—C11	124.0 (5)	O1W—Sr1—Sr1i	76.17 (9)
N2—C17—H17	118.0	O2W—Sr1—Sr1i	125.03 (9)
C11—C17—H17	118.0	O2—Sr1—Sr1i	84.84 (7)
C13—C18—C19	118.9 (6)	O4—Sr1—Sr1i	121.68 (7)
C13—C18—C12	123.4 (6)	O1—Sr1—Sr1i	35.59 (7)
C19—C18—C12	117.6 (5)	O3—Sr1—Sr1i	74.54 (8)
N2—C19—C16	118.5 (6)	Sr1ii—Sr1—Sr1i	149.85 (2)
N2—C19—C18	122.0 (5)	O4i—Sr1—H2W	68.4 (7)
C16—C19—C18	119.4 (6)	O1ii—Sr1—H2W	102.4 (5)
O3—C20—O4	122.8 (5)	O1W—Sr1—H2W	15.7 (6)
O3—C20—C11	119.3 (5)	O2W—Sr1—H2W	107.5 (11)
O4—C20—C11	117.8 (5)	O2—Sr1—H2W	91.7 (11)
C7—N1—C9	118.1 (4)	O4—Sr1—H2W	172.8 (10)
C17—N2—C19	117.6 (5)	O1—Sr1—H2W	71.0 (10)
C10—O1—Sr1i	161.6 (3)	O3—Sr1—H2W	134.7 (6)
C10—O1—Sr1	91.8 (3)	Sr1ii—Sr1—H2W	139.3 (6)
Sr1i—O1—Sr1	106.14 (12)	Sr1i—Sr1—H2W	60.5 (6)
C10—O2—Sr1	93.7 (3)

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

Hydrogen-bond geometry (Å, °)

D—H···A	D—H	H···A	D···A	D—H···A
O1W—H2W···O2i	0.84 (1)	1.97 (2)	2.798 (5)	168 (6)
O1W—H1W···N1iii	0.84 (1)	2.01 (1)	2.846 (6)	175 (6)
O2W—H3W···O3ii	0.84 (1)	1.99 (2)	2.810 (5)	166 (5)
O2W—H4W···N2iv	0.84 (1)	2.01 (1)	2.846 (6)	176 (5)

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