Dicaesium diaqua-bis-(methyl-ene-diphospho-nato-κO,O')cobaltate(II).

The asymmetric unit of the title compound, Cs(2)[Co(CH(4)O(6)P(2))(2)(H(2)O)(2)], is comprised of one bidentate methyl-enediphospho-nate ligand and one water mol-ecule which are coordinated to the Co(II) atom, as well as a caesium counter-cation. The Co atom occupies a special position on a crystallographic inversion center. The caesium ion is octa-hedrally coordinated by six O atoms with Cs-O distances ranging from 3.119 (2) to 3.296 (2) Å. A three-dimensional network is formed through O-H⋯O hydrogen bonds.

Related literature

For related structures, see: Fleisch (1991 ▶); Neville-Webbe et al. (2002 ▶); Van der Merwe et al. (2010 ▶). For bond lengths and bond angles in related structures, see: Bao et al. (2003 ▶); Cao et al. (2007 ▶); Gong et al. (2006 ▶); Van der Merwe et al. (2009 ▶); Visser et al. (2010 ▶); Yin et al. (2003 ▶).

Experimental

Crystal data

Cs2[Co(CH4O6P2)2(H2O)2]

M = 708.75

Triclinic,

a = 7.333 (5) Å

b = 7.412 (5) Å

c = 7.666 (5) Å

α = 74.621 (5)°

β = 83.064 (5)°

γ = 86.496 (5)°

V = 398.6 (5) Å3

Z = 1

Mo Kα radiation

μ = 5.96 mm−1

T = 293 K

0.38 × 0.07 × 0.05 mm

Data collection

Bruker APEXII CCD diffractometer

Absorption correction: multi-scan (SADABS; Bruker, 2001 ▶) T min = 0.210, T max = 0.755

4203 measured reflections

1904 independent reflections

1827 reflections with I > 2σ(I)

R int = 0.015

Refinement

R[F 2 > 2σ(F 2)] = 0.015

wR(F 2) = 0.044

S = 0.75

1904 reflections

132 parameters

11 restraints

H atoms treated by a mixture of independent and constrained refinement

Δρmax = 0.47 e Å−3

Δρmin = −0.48 e Å−3

Data collection: APEX2 (Bruker, 2005 ▶); cell refinement: SAINT-Plus (Bruker, 2004 ▶); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: DIAMOND (Brandenburg & Putz, 2005 ▶); software used to prepare material for publication: WinGX (Farrugia, 1999 ▶).

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536811035355/jh2322sup1.cif

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536811035355/jh2322Isup2.hkl

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

Cs2[Co(CH4O6P2)2(H2O)2]	Z = 1
Mr = 708.75	F(000) = 253
Triclinic, P1	Dx = 2.953 Mg m−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 7.333 (5) Å	Cell parameters from 3160 reflections
b = 7.412 (5) Å	θ = 2.8–28.4°
c = 7.666 (5) Å	µ = 5.96 mm−1
α = 74.621 (5)°	T = 293 K
β = 83.064 (5)°	Needle, pink
γ = 86.496 (5)°	0.38 × 0.07 × 0.05 mm
V = 398.6 (5) Å3

Bruker APEXII CCD diffractometer	1827 reflections with I > 2σ(I)
φ and ω scans	Rint = 0.015
Absorption correction: multi-scan (SADABS; Bruker, 2001)	θmax = 28°, θmin = 3.7°
Tmin = 0.210, Tmax = 0.755	h = −9→9
4203 measured reflections	k = −9→9
1904 independent reflections	l = −10→10

Refinement on F2	11 restraints
Least-squares matrix: full	H atoms treated by a mixture of independent and constrained refinement
R[F2 > 2σ(F2)] = 0.015	w = 1/[σ2(Fo2) + (0.0412P)2 + 0.4899P] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.044	(Δ/σ)max = 0.002
S = 0.75	Δρmax = 0.47 e Å−3
1904 reflections	Δρmin = −0.48 e Å−3
132 parameters

Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'s involving l.s. planes.

	x	y	z	Uiso*/Ueq	Occ. (<1)
Cs1	0.284577 (17)	0.954858 (18)	0.692901 (17)	0.00965 (6)
Co1	0.5	0.5	0.5	0.00595 (9)
P1	0.26392 (7)	0.34252 (8)	0.22866 (8)	0.00590 (11)
P2	0.19616 (7)	0.74778 (8)	0.25147 (8)	0.00589 (11)
O1	0.2886 (2)	0.4437 (2)	0.7201 (2)	0.0112 (3)
O2	0.3857 (2)	0.3210 (2)	0.3786 (2)	0.0088 (3)
O3	0.0667 (2)	0.2706 (2)	0.3122 (2)	0.0086 (3)
O4	0.3336 (2)	0.2396 (2)	0.0861 (2)	0.0086 (3)
O5	0.1822 (2)	0.9384 (2)	0.1036 (2)	0.0109 (3)
O6	0.0107 (2)	0.7058 (2)	0.3621 (2)	0.0102 (3)
O7	0.3541 (2)	0.7427 (2)	0.3623 (2)	0.0086 (3)
C1	0.2397 (3)	0.5858 (3)	0.1121 (3)	0.0071 (4)
H1A	0.313 (4)	0.383 (4)	0.837 (3)	0.023 (9)*
H1B	0.185 (4)	0.410 (6)	0.704 (6)	0.063 (15)*
H2	0.048 (5)	0.287 (5)	0.417 (3)	0.035 (10)*
H3	0.145 (3)	0.599 (4)	0.033 (4)	0.018 (8)*
H4	0.357 (3)	0.616 (4)	0.046 (4)	0.015 (8)*
H5A	0.156 (9)	0.935 (9)	0.002 (5)	0.022*	0.5
H5B	0.239 (8)	1.030 (7)	0.116 (9)	0.022*	0.5

	U11	U22	U33	U12	U13	U23
Cs1	0.01010 (9)	0.00910 (9)	0.00854 (9)	0.00056 (5)	−0.00040 (5)	−0.00068 (6)
Co1	0.00540 (19)	0.00593 (19)	0.0067 (2)	−0.00035 (15)	−0.00109 (15)	−0.00174 (16)
P1	0.0061 (2)	0.0053 (2)	0.0063 (3)	−0.00119 (19)	−0.0007 (2)	−0.0015 (2)
P2	0.0060 (2)	0.0060 (3)	0.0057 (3)	−0.00059 (19)	−0.0006 (2)	−0.0014 (2)
O1	0.0084 (8)	0.0160 (9)	0.0088 (8)	−0.0027 (7)	−0.0002 (6)	−0.0019 (7)
O2	0.0097 (7)	0.0077 (7)	0.0092 (8)	−0.0008 (6)	−0.0028 (6)	−0.0015 (6)
O3	0.0076 (7)	0.0110 (8)	0.0077 (8)	−0.0033 (6)	0.0007 (6)	−0.0032 (6)
O4	0.0098 (7)	0.0072 (7)	0.0096 (8)	−0.0012 (6)	0.0008 (6)	−0.0040 (6)
O5	0.0173 (8)	0.0063 (7)	0.0093 (8)	−0.0012 (6)	−0.0063 (7)	−0.0002 (6)
O6	0.0072 (7)	0.0139 (8)	0.0096 (8)	−0.0017 (6)	0.0012 (6)	−0.0040 (6)
O7	0.0096 (7)	0.0067 (7)	0.0098 (8)	−0.0003 (6)	−0.0032 (6)	−0.0016 (6)
C1	0.0087 (9)	0.0066 (10)	0.0056 (10)	−0.0009 (8)	−0.0011 (8)	−0.0005 (8)

Cs1—O5i	3.119 (3)	P2—O6	1.5158 (18)
Cs1—O3ii	3.165 (2)	P2—O5	1.5663 (19)
Cs1—O2iii	3.162 (2)	P2—C1	1.799 (2)
Cs1—O2iv	3.173 (2)	O1—H1A	0.922 (17)
Cs1—O6v	3.192 (2)	O1—H1B	0.846 (19)
Cs1—O4iii	3.485 (2)	O2—Cs1iii	3.162 (2)
Cs1—O7vi	3.490 (2)	O2—Cs1vii	3.173 (2)
Co1—O2iii	2.0761 (18)	O3—Cs1ii	3.165 (2)
Co1—O2	2.0761 (18)	O3—H2	0.840 (19)
Co1—O1iii	2.1209 (19)	O4—Cs1iii	3.485 (2)
Co1—O1	2.1209 (19)	O5—Cs1viii	3.119 (3)
Co1—O7iii	2.1272 (19)	O5—H5A	0.83 (2)
Co1—O7	2.1272 (19)	O5—H5B	0.85 (2)
P1—O2	1.5087 (18)	O6—Cs1v	3.192 (2)
P1—O4	1.5158 (18)	O7—Cs1vi	3.490 (2)
P1—O3	1.5732 (18)	C1—H3	0.963 (14)
P1—C1	1.796 (3)	C1—H4	0.951 (14)
P2—O7	1.5099 (18)
O5i—Cs1—O3ii	91.51 (5)	O7—Co1—Cs1iii	128.78 (6)
O5i—Cs1—O2iii	113.53 (4)	O2iii—Co1—Cs1vi	45.80 (6)
O3ii—Cs1—O2iii	103.25 (7)	O2—Co1—Cs1vi	134.20 (6)
O5i—Cs1—O2iv	125.59 (5)	O1iii—Co1—Cs1vi	60.18 (5)
O3ii—Cs1—O2iv	120.31 (5)	O1—Co1—Cs1vi	119.82 (5)
O2iii—Cs1—O2iv	101.31 (5)	O7iii—Co1—Cs1vi	125.13 (6)
O5i—Cs1—O6v	82.95 (5)	O7—Co1—Cs1vi	54.87 (6)
O3ii—Cs1—O6v	81.36 (7)	Cs1iii—Co1—Cs1vi	123.10 (4)
O2iii—Cs1—O6v	162.47 (4)	O2iii—Co1—Cs1vii	134.20 (6)
O2iv—Cs1—O6v	62.52 (5)	O2—Co1—Cs1vii	45.80 (6)
O5i—Cs1—O4iii	73.40 (5)	O1iii—Co1—Cs1vii	119.82 (5)
O3ii—Cs1—O4iii	124.24 (6)	O1—Co1—Cs1vii	60.18 (5)
O2iii—Cs1—O4iii	44.75 (5)	O7iii—Co1—Cs1vii	54.87 (6)
O2iv—Cs1—O4iii	111.44 (5)	O7—Co1—Cs1vii	125.13 (6)
O6v—Cs1—O4iii	144.68 (4)	Cs1iii—Co1—Cs1vii	56.90 (4)
O5i—Cs1—O7vi	94.14 (4)	Cs1vi—Co1—Cs1vii	180
O3ii—Cs1—O7vi	170.61 (4)	O2—P1—O4	114.76 (10)
O2iii—Cs1—O7vi	81.34 (7)	O2—P1—O3	109.86 (10)
O2iv—Cs1—O7vi	50.37 (5)	O4—P1—O3	107.73 (9)
O6v—Cs1—O7vi	91.89 (7)	O2—P1—C1	109.55 (10)
O4iii—Cs1—O7vi	64.74 (6)	O4—P1—C1	107.05 (11)
O5i—Cs1—C1i	44.75 (6)	O3—P1—C1	107.62 (10)
O3ii—Cs1—C1i	72.92 (5)	O2—P1—Cs1iii	51.16 (7)
O2iii—Cs1—C1i	78.47 (6)	O4—P1—Cs1iii	63.66 (7)
O2iv—Cs1—C1i	165.97 (5)	O3—P1—Cs1iii	124.40 (8)
O6v—Cs1—C1i	118.91 (5)	C1—P1—Cs1iii	127.77 (8)
O4iii—Cs1—C1i	58.52 (5)	O2—P1—Cs1vii	49.06 (7)
O7vi—Cs1—C1i	116.25 (5)	O4—P1—Cs1vii	103.57 (8)
O5i—Cs1—O1iv	74.68 (4)	O3—P1—Cs1vii	68.88 (7)
O3ii—Cs1—O1iv	126.32 (5)	C1—P1—Cs1vii	148.54 (8)
O2iii—Cs1—O1iv	130.04 (5)	Cs1iii—P1—Cs1vii	61.70 (2)
O2iv—Cs1—O1iv	50.97 (5)	O7—P2—O6	114.83 (11)
O6v—Cs1—O1iv	46.06 (5)	O7—P2—O5	111.69 (10)
O4iii—Cs1—O1iv	101.41 (4)	O6—P2—O5	109.44 (10)
O7vi—Cs1—O1iv	48.72 (4)	O7—P2—C1	110.57 (10)
C1i—Cs1—O1iv	118.60 (6)	O6—P2—C1	108.09 (10)
O5i—Cs1—O3iv	125.42 (5)	O5—P2—C1	101.32 (11)
O3ii—Cs1—O3iv	78.65 (6)	O7—P2—Cs1v	124.05 (8)
O2iii—Cs1—O3iv	121.02 (5)	O5—P2—Cs1v	65.52 (7)
O2iv—Cs1—O3iv	42.33 (5)	C1—P2—Cs1v	125.05 (8)
O6v—Cs1—O3iv	42.63 (4)	O7—P2—Cs1viii	118.54 (7)
O4iii—Cs1—O3iv	152.49 (4)	O6—P2—Cs1viii	125.77 (7)
O7vi—Cs1—O3iv	91.97 (5)	C1—P2—Cs1viii	61.03 (8)
C1i—Cs1—O3iv	148.87 (5)	Cs1v—P2—Cs1viii	94.916 (19)
O1iv—Cs1—O3iv	69.55 (5)	Co1—O1—Cs1vii	89.88 (6)
O5i—Cs1—O5v	55.64 (5)	Co1—O1—H1A	122 (2)
O3ii—Cs1—O5v	56.50 (6)	Cs1vii—O1—H1A	81 (2)
O2iii—Cs1—O5v	153.15 (4)	Co1—O1—H1B	120 (3)
O2iv—Cs1—O5v	104.38 (5)	Cs1vii—O1—H1B	66 (3)
O6v—Cs1—O5v	41.87 (4)	H1A—O1—H1B	108 (3)
O4iii—Cs1—O5v	128.47 (5)	P1—O2—Co1	135.98 (10)
O7vi—Cs1—O5v	121.54 (5)	P1—O2—Cs1iii	107.03 (9)
C1i—Cs1—O5v	78.50 (5)	Co1—O2—Cs1iii	103.97 (7)
O1iv—Cs1—O5v	73.92 (4)	P1—O2—Cs1vii	109.88 (8)
O3iv—Cs1—O5v	75.37 (5)	Co1—O2—Cs1vii	106.22 (8)
O5i—Cs1—P1iii	94.28 (4)	Cs1iii—O2—Cs1vii	78.69 (5)
O3ii—Cs1—P1iii	115.59 (6)	P1—O3—Cs1ii	150.94 (9)
O2iii—Cs1—P1iii	21.82 (3)	P1—O3—Cs1vii	87.66 (8)
O2iv—Cs1—P1iii	106.97 (4)	Cs1ii—O3—Cs1vii	101.35 (6)
O6v—Cs1—P1iii	162.96 (3)	P1—O3—H2	108 (3)
O4iii—Cs1—P1iii	22.94 (3)	Cs1ii—O3—H2	101 (3)
O7vi—Cs1—P1iii	71.49 (6)	Cs1vii—O3—H2	59 (3)
C1i—Cs1—P1iii	67.80 (4)	P1—O4—Cs1iii	93.39 (8)
O1iv—Cs1—P1iii	116.98 (4)	P2—O5—Cs1viii	120.07 (9)
O3iv—Cs1—P1iii	138.50 (3)	P2—O5—Cs1v	91.93 (8)
O5v—Cs1—P1iii	145.78 (4)	Cs1viii—O5—Cs1v	124.36 (5)
O2iii—Co1—O2	180	P2—O5—H5A	118 (5)
O2iii—Co1—O1iii	90.76 (8)	Cs1v—O5—H5A	99 (5)
O2—Co1—O1iii	89.24 (8)	P2—O5—H5B	117 (5)
O2iii—Co1—O1	89.24 (8)	Cs1viii—O5—H5B	103 (5)
O2—Co1—O1	90.76 (8)	Cs1v—O5—H5B	100 (5)
O1iii—Co1—O1	180	H5A—O5—H5B	121 (6)
O2iii—Co1—O7iii	94.65 (8)	P2—O6—Cs1v	115.52 (9)
O2—Co1—O7iii	85.35 (8)	P2—O7—Co1	126.62 (10)
O1iii—Co1—O7iii	91.47 (7)	P2—O7—Cs1vi	131.62 (9)
O1—Co1—O7iii	88.53 (7)	Co1—O7—Cs1vi	95.23 (7)
O2iii—Co1—O7	85.35 (8)	P1—C1—P2	116.79 (13)
O2—Co1—O7	94.65 (8)	P1—C1—Cs1viii	149.47 (11)
O1iii—Co1—O7	88.53 (7)	P2—C1—Cs1viii	93.21 (10)
O1—Co1—O7	91.47 (7)	P1—C1—H3	108.1 (19)
O7iii—Co1—O7	180.00 (9)	P2—C1—H3	110.1 (19)
O2iii—Co1—Cs1iii	132.78 (6)	Cs1viii—C1—H3	62.8 (19)
O2—Co1—Cs1iii	47.22 (6)	P1—C1—H4	104.3 (19)
O1iii—Co1—Cs1iii	63.15 (5)	P2—C1—H4	105.3 (19)
O1—Co1—Cs1iii	116.85 (5)	Cs1viii—C1—H4	59.3 (18)
O7iii—Co1—Cs1iii	51.22 (6)	H3—C1—H4	112 (3)
O2iii—Co1—O1—Cs1vii	−144.21 (6)	C1—P2—O5—Cs1viii	−8.70 (12)
O2—Co1—O1—Cs1vii	35.79 (6)	Cs1v—P2—O5—Cs1viii	−132.22 (9)
O7iii—Co1—O1—Cs1vii	−49.55 (6)	O7—P2—O5—Cs1v	−118.75 (9)
O7—Co1—O1—Cs1vii	130.45 (6)	O6—P2—O5—Cs1v	9.54 (9)
Cs1iii—Co1—O1—Cs1vii	−5.22 (5)	C1—P2—O5—Cs1v	123.53 (8)
Cs1vi—Co1—O1—Cs1vii	180	Cs1viii—P2—O5—Cs1v	132.22 (9)
O4—P1—O2—Co1	130.04 (13)	O7—P2—O6—Cs1v	114.18 (10)
O3—P1—O2—Co1	−108.42 (14)	O5—P2—O6—Cs1v	−12.34 (11)
C1—P1—O2—Co1	9.60 (17)	C1—P2—O6—Cs1v	−121.88 (10)
Cs1iii—P1—O2—Co1	132.87 (17)	Cs1viii—P2—O6—Cs1v	−55.00 (10)
Cs1vii—P1—O2—Co1	−143.29 (18)	O6—P2—O7—Co1	80.65 (14)
O4—P1—O2—Cs1iii	−2.83 (11)	O5—P2—O7—Co1	−154.00 (11)
O3—P1—O2—Cs1iii	118.71 (9)	C1—P2—O7—Co1	−41.97 (15)
C1—P1—O2—Cs1iii	−123.27 (9)	Cs1v—P2—O7—Co1	131.64 (9)
Cs1vii—P1—O2—Cs1iii	83.84 (8)	Cs1viii—P2—O7—Co1	−109.34 (10)
O4—P1—O2—Cs1vii	−86.67 (11)	O6—P2—O7—Cs1vi	−135.06 (11)
O3—P1—O2—Cs1vii	34.87 (11)	O5—P2—O7—Cs1vi	−9.70 (14)
C1—P1—O2—Cs1vii	152.89 (9)	C1—P2—O7—Cs1vi	102.32 (13)
Cs1iii—P1—O2—Cs1vii	−83.84 (8)	Cs1v—P2—O7—Cs1vi	−84.06 (12)
O1iii—Co1—O2—P1	−80.87 (15)	Cs1viii—P2—O7—Cs1vi	34.96 (13)
O1—Co1—O2—P1	99.13 (15)	O2iii—Co1—O7—P2	−168.93 (12)
O7iii—Co1—O2—P1	−172.41 (15)	O2—Co1—O7—P2	11.07 (12)
O7—Co1—O2—P1	7.59 (15)	O1iii—Co1—O7—P2	100.19 (13)
Cs1iii—Co1—O2—P1	−133.77 (17)	O1—Co1—O7—P2	−79.81 (13)
Cs1vi—Co1—O2—P1	−35.83 (17)	Cs1iii—Co1—O7—P2	47.08 (14)
Cs1vii—Co1—O2—P1	144.17 (17)	Cs1vi—Co1—O7—P2	154.02 (14)
O1iii—Co1—O2—Cs1iii	52.90 (7)	Cs1vii—Co1—O7—P2	−25.98 (14)
O1—Co1—O2—Cs1iii	−127.10 (7)	O2iii—Co1—O7—Cs1vi	37.05 (6)
O7iii—Co1—O2—Cs1iii	−38.64 (6)	O2—Co1—O7—Cs1vi	−142.95 (6)
O7—Co1—O2—Cs1iii	141.36 (6)	O1iii—Co1—O7—Cs1vi	−53.82 (6)
Cs1vi—Co1—O2—Cs1iii	97.94 (6)	O1—Co1—O7—Cs1vi	126.18 (6)
Cs1vii—Co1—O2—Cs1iii	−82.06 (6)	Cs1iii—Co1—O7—Cs1vi	−106.94 (4)
O1iii—Co1—O2—Cs1vii	134.96 (7)	Cs1vii—Co1—O7—Cs1vi	180
O1—Co1—O2—Cs1vii	−45.04 (7)	O2—P1—C1—P2	−44.78 (16)
O7iii—Co1—O2—Cs1vii	43.42 (6)	O4—P1—C1—P2	−169.80 (12)
O7—Co1—O2—Cs1vii	−136.58 (6)	O3—P1—C1—P2	74.63 (14)
Cs1iii—Co1—O2—Cs1vii	82.06 (6)	Cs1iii—P1—C1—P2	−100.25 (12)
Cs1vi—Co1—O2—Cs1vii	180	Cs1vii—P1—C1—P2	−3.5 (2)
O2—P1—O3—Cs1ii	−136.98 (17)	O2—P1—C1—Cs1viii	123.58 (19)
O4—P1—O3—Cs1ii	−11.3 (2)	O4—P1—C1—Cs1viii	−1.4 (2)
C1—P1—O3—Cs1ii	103.8 (2)	O3—P1—C1—Cs1viii	−117.01 (19)
Cs1iii—P1—O3—Cs1ii	−81.1 (2)	Cs1iii—P1—C1—Cs1viii	68.1 (2)
Cs1vii—P1—O3—Cs1ii	−109.40 (19)	Cs1vii—P1—C1—Cs1viii	164.84 (9)
O2—P1—O3—Cs1vii	−27.58 (9)	O7—P2—C1—P1	62.05 (15)
O4—P1—O3—Cs1vii	98.08 (9)	O6—P2—C1—P1	−64.42 (15)
C1—P1—O3—Cs1vii	−146.80 (8)	O5—P2—C1—P1	−179.41 (12)
Cs1iii—P1—O3—Cs1vii	28.30 (7)	Cs1v—P2—C1—P1	−111.48 (11)
O2—P1—O4—Cs1iii	2.46 (9)	Cs1viii—P2—C1—P1	174.11 (15)
O3—P1—O4—Cs1iii	−120.24 (8)	O7—P2—C1—Cs1viii	−112.06 (8)
C1—P1—O4—Cs1iii	124.27 (8)	O6—P2—C1—Cs1viii	121.47 (8)
Cs1vii—P1—O4—Cs1iii	−48.42 (5)	O5—P2—C1—Cs1viii	6.48 (9)
O7—P2—O5—Cs1viii	109.03 (10)	Cs1v—P2—C1—Cs1viii	74.41 (7)
O6—P2—O5—Cs1viii	−122.68 (10)

D—H···A	D—H	H···A	D···A	D—H···A
O1—H1A···O4i	0.92 (2)	1.94 (2)	2.860 (3)	173 (3)
O5—H5B···O4iv	0.85 (2)	1.69 (3)	2.518 (3)	164 (7)

Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1A⋯O4i	0.92 (2)	1.94 (2)	2.860 (3)	173 (3)
O5—H5B⋯O4ii	0.85 (2)	1.69 (3)	2.518 (3)	164 (7)

Symmetry codes: (i) ; (ii) .