Poly[[penta-aqua-(μ(4)-pyridine-2,4,6-tri-carboxyl-ato)(μ(3)-pyridine-2,4,6-tri-carboxyl-ato)diterbium(III)] mono-hydrate].

The three-dimensional title coordination polymer, {[Tb(2)(C(8)H(2)NO(6))(2)(H(2)O)(5)]·H(2)O}(n), was hydro-thermally synthesized by reacting the corresponding rare-earth salt with pyridine-2,4,6-tricarb-oxy-lic acid (H(3)ptc). There are two independent Tb(III) atoms in the structure, one of which is nine-coordinated, forming a monocapped NO(8) square-anti-prism and the other is eight-coordinated exhibiting a 4,4-bicapped NO(7) trigonal-prismatic environment. The complex units are inter-connected through the ptc(3-) anions acting in different coordination modes, resulting in a three-dimensional coordin-ation polymer. The crystal structure features extensive O-H⋯O hydrogen bonds.

Related literature

For general background to the design and synthesis of metal organic frameworks (MOFs) with lanthanides, see: Wang et al. (2007 ▶); Fu & Xu (2008 ▶); Das et al. (2009 ▶). For related structures, see: Lin et al. (2011 ▶).

Experimental

Crystal data

[Tb2(C8H2NO6)2(H2O)5]·H2O

M = 842.15

Monoclinic,

a = 18.426 (4) Å

b = 6.9082 (14) Å

c = 18.583 (4) Å

β = 111.98 (3)°

V = 2193.6 (8) Å3

Z = 4

Mo Kα radiation

μ = 6.50 mm−1

T = 293 K

0.38 × 0.34 × 0.31 mm

Data collection

Rigaku R-AXIS RAPID diffractometer

Absorption correction: multi-scan (ABSCOR; Higashi, 1995 ▶) T min = 0.101, T max = 0.128

20352 measured reflections

4912 independent reflections

4764 reflections with I > 2σ(I)

R int = 0.041

Refinement

R[F 2 > 2σ(F 2)] = 0.020

wR(F 2) = 0.045

S = 1.20

4912 reflections

344 parameters

H-atom parameters constrained

Δρmax = 1.07 e Å−3

Δρmin = −1.34 e Å−3

Data collection: RAPID-AUTO (Rigaku, 1998 ▶); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 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: SHELXL97.

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536812032898/bg2463sup1.cif

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536812032898/bg2463Isup2.hkl

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

[Tb2(C8H2NO6)2(H2O)5]·H2O	Z = 4
Mr = 842.15	F(000) = 1600
Monoclinic, P21/n	Dx = 2.550 Mg m−3
Hall symbol: -P 2yn	Mo Kα radiation, λ = 0.71073 Å
a = 18.426 (4) Å	θ = 3.2–27.5°
b = 6.9082 (14) Å	µ = 6.50 mm−1
c = 18.583 (4) Å	T = 293 K
β = 111.98 (3)°	Block, colorless
V = 2193.6 (8) Å3	0.38 × 0.34 × 0.31 mm

Rigaku R-AXIS RAPID diffractometer	4912 independent reflections
Radiation source: fine-focus sealed tube	4764 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.041
ω scans	θmax = 27.3°, θmin = 3.2°
Absorption correction: multi-scan (ABSCOR; Higashi, 1995)	h = −22→23
Tmin = 0.101, Tmax = 0.128	k = −8→8
20352 measured reflections	l = −23→23

Refinement on F2	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.020	H-atom parameters constrained
wR(F2) = 0.045	w = 1/[σ2(Fo2) + (0.P)2 + 4.3115P] where P = (Fo2 + 2Fc2)/3
S = 1.20	(Δ/σ)max = 0.002
4912 reflections	Δρmax = 1.07 e Å−3
344 parameters	Δρmin = −1.34 e Å−3
0 restraints	Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methods	Extinction coefficient: 0.00271 (8)

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.

	x	y	z	Uiso*/Ueq
Tb1	0.373479 (7)	0.223057 (19)	0.377229 (7)	0.00937 (5)
Tb2	0.375301 (8)	0.251927 (17)	0.896094 (8)	0.00979 (5)
N1	0.42976 (13)	0.3322 (3)	0.27869 (13)	0.0120 (4)
C1	0.38349 (15)	0.4121 (4)	0.21132 (16)	0.0114 (5)
C2	0.40676 (16)	0.4340 (4)	0.14843 (16)	0.0133 (5)
H2A	0.3734	0.4880	0.1020	0.016*
C3	0.48211 (16)	0.3717 (4)	0.15760 (16)	0.0118 (5)
C4	0.53247 (16)	0.3018 (4)	0.22990 (16)	0.0124 (5)
H4A	0.5838	0.2683	0.2381	0.015*
C5	0.50402 (16)	0.2835 (4)	0.28911 (17)	0.0117 (5)
C6	0.30262 (16)	0.4654 (4)	0.20976 (16)	0.0129 (5)
O1	0.25948 (12)	0.5738 (3)	0.15823 (12)	0.0172 (4)
O2	0.28622 (12)	0.3911 (3)	0.26523 (12)	0.0199 (5)
C7	0.50831 (16)	0.3728 (4)	0.08905 (15)	0.0118 (5)
O3	0.45963 (13)	0.3158 (3)	0.02548 (12)	0.0209 (4)
O4	0.57796 (12)	0.4253 (3)	0.10240 (12)	0.0161 (4)
C8	0.55027 (16)	0.2057 (4)	0.36969 (16)	0.0128 (5)
O5	0.62146 (12)	0.1821 (4)	0.39036 (13)	0.0265 (5)
O6	0.50974 (12)	0.1686 (3)	0.41138 (12)	0.0177 (4)
O7	0.36674 (12)	−0.0446 (3)	0.29048 (12)	0.0209 (5)
H7B	0.3178	−0.0743	0.2654	0.025*
H7A	0.3876	−0.0504	0.2574	0.025*
O8	0.40741 (13)	0.5604 (3)	0.39763 (14)	0.0258 (5)
H8A	0.4527	0.6096	0.4200	0.031*
H8B	0.3682	0.5986	0.4083	0.031*
O9	0.37823 (13)	−0.0719 (3)	0.45020 (12)	0.0213 (5)
H9A	0.4149	−0.0984	0.4934	0.026*
H9B	0.3420	−0.1105	0.4649	0.026*
N2	0.38187 (14)	0.2851 (3)	0.76431 (14)	0.0118 (5)
C9	0.31950 (16)	0.3532 (4)	0.70517 (16)	0.0127 (5)
C10	0.31708 (17)	0.3629 (4)	0.62886 (16)	0.0148 (6)
H10A	0.2727	0.4069	0.5885	0.018*
C11	0.38337 (16)	0.3044 (4)	0.61552 (16)	0.0134 (5)
C12	0.44858 (17)	0.2370 (4)	0.67751 (17)	0.0124 (6)
H12A	0.4938	0.2006	0.6699	0.015*
C13	0.44498 (17)	0.2250 (4)	0.75132 (17)	0.0122 (5)
C14	0.25274 (16)	0.4193 (4)	0.72878 (16)	0.0138 (5)
O10	0.19299 (12)	0.4879 (3)	0.67646 (12)	0.0202 (4)
O11	0.26267 (12)	0.3988 (3)	0.79939 (12)	0.0215 (5)
C15	0.38344 (17)	0.3049 (4)	0.53373 (16)	0.0144 (5)
O12	0.44733 (13)	0.2845 (3)	0.52418 (13)	0.0209 (5)
O13	0.31908 (12)	0.3159 (3)	0.47642 (12)	0.0194 (4)
C16	0.50943 (16)	0.1457 (4)	0.82340 (16)	0.0121 (5)
O14	0.57132 (12)	0.0860 (3)	0.81932 (12)	0.0194 (4)
O15	0.49393 (12)	0.1463 (3)	0.88514 (11)	0.0184 (4)
O16	0.39547 (13)	−0.0436 (3)	0.97204 (12)	0.0226 (5)
H16B	0.4251	−0.0676	1.0162	0.027*
H16A	0.3898	−0.1570	0.9529	0.027*
O17	0.28287 (12)	0.3108 (4)	0.95346 (13)	0.0257 (5)
H17B	0.2358	0.3132	0.9261	0.031*
H17A	0.2806	0.2465	0.9929	0.031*
O18	0.21272 (15)	0.6101 (4)	0.42001 (15)	0.0346 (6)
H18B	0.2389	0.5106	0.4367	0.041*
H18A	0.1688	0.5550	0.3908	0.041*

	U11	U22	U33	U12	U13	U23
Tb1	0.00889 (8)	0.01244 (7)	0.00678 (8)	0.00037 (4)	0.00293 (6)	0.00027 (4)
Tb2	0.00709 (8)	0.01571 (8)	0.00572 (8)	−0.00047 (4)	0.00141 (6)	0.00003 (4)
N1	0.0092 (11)	0.0155 (12)	0.0108 (11)	0.0008 (9)	0.0032 (10)	0.0015 (9)
C1	0.0086 (13)	0.0135 (13)	0.0111 (13)	0.0009 (10)	0.0023 (11)	0.0012 (10)
C2	0.0116 (13)	0.0156 (14)	0.0097 (13)	0.0002 (10)	0.0005 (11)	0.0028 (10)
C3	0.0130 (13)	0.0123 (13)	0.0105 (13)	−0.0037 (10)	0.0050 (11)	−0.0019 (9)
C4	0.0102 (13)	0.0136 (13)	0.0129 (14)	−0.0026 (10)	0.0040 (11)	−0.0009 (10)
C5	0.0099 (13)	0.0134 (13)	0.0105 (14)	−0.0017 (10)	0.0025 (12)	−0.0005 (10)
C6	0.0095 (13)	0.0166 (14)	0.0106 (13)	0.0004 (10)	0.0016 (11)	−0.0001 (10)
O1	0.0122 (10)	0.0235 (11)	0.0148 (10)	0.0044 (8)	0.0038 (9)	0.0062 (8)
O2	0.0130 (10)	0.0310 (12)	0.0174 (11)	0.0059 (8)	0.0076 (9)	0.0106 (9)
C7	0.0139 (13)	0.0121 (13)	0.0093 (13)	0.0016 (10)	0.0044 (11)	0.0018 (9)
O3	0.0208 (11)	0.0298 (12)	0.0091 (10)	−0.0040 (9)	0.0022 (9)	−0.0026 (9)
O4	0.0141 (10)	0.0208 (11)	0.0154 (10)	−0.0023 (8)	0.0080 (9)	0.0000 (8)
C8	0.0106 (13)	0.0146 (13)	0.0114 (13)	0.0002 (10)	0.0021 (12)	−0.0003 (10)
O5	0.0103 (11)	0.0439 (15)	0.0230 (13)	0.0050 (9)	0.0037 (10)	0.0105 (10)
O6	0.0130 (10)	0.0271 (12)	0.0133 (10)	0.0051 (8)	0.0051 (9)	0.0060 (8)
O7	0.0140 (10)	0.0330 (12)	0.0176 (11)	−0.0037 (9)	0.0081 (9)	−0.0103 (9)
O8	0.0238 (12)	0.0199 (12)	0.0321 (13)	−0.0043 (9)	0.0086 (11)	−0.0055 (9)
O9	0.0241 (12)	0.0237 (11)	0.0151 (11)	0.0032 (9)	0.0063 (10)	0.0067 (8)
N2	0.0100 (11)	0.0143 (11)	0.0097 (12)	−0.0011 (9)	0.0022 (10)	−0.0004 (9)
C9	0.0130 (13)	0.0137 (13)	0.0104 (13)	0.0008 (10)	0.0033 (11)	0.0008 (10)
C10	0.0136 (14)	0.0191 (14)	0.0092 (13)	0.0036 (10)	0.0013 (12)	0.0026 (10)
C11	0.0159 (14)	0.0146 (13)	0.0095 (14)	−0.0004 (11)	0.0043 (12)	−0.0023 (10)
C12	0.0125 (14)	0.0157 (14)	0.0096 (14)	0.0016 (9)	0.0049 (12)	−0.0007 (9)
C13	0.0114 (14)	0.0120 (13)	0.0128 (14)	0.0002 (10)	0.0039 (12)	−0.0005 (10)
C14	0.0130 (13)	0.0150 (13)	0.0127 (13)	0.0021 (10)	0.0038 (12)	−0.0001 (10)
O10	0.0159 (10)	0.0283 (12)	0.0122 (10)	0.0099 (9)	0.0006 (9)	0.0038 (8)
O11	0.0154 (11)	0.0391 (13)	0.0102 (10)	0.0086 (9)	0.0052 (9)	0.0039 (9)
C15	0.0191 (15)	0.0151 (14)	0.0095 (13)	0.0016 (11)	0.0060 (12)	−0.0002 (10)
O12	0.0166 (11)	0.0344 (12)	0.0119 (11)	0.0012 (9)	0.0056 (10)	−0.0019 (9)
O13	0.0169 (11)	0.0307 (12)	0.0095 (10)	0.0043 (9)	0.0036 (9)	−0.0018 (9)
C16	0.0107 (13)	0.0140 (13)	0.0099 (13)	−0.0010 (10)	0.0021 (11)	−0.0005 (10)
O14	0.0131 (10)	0.0293 (12)	0.0167 (11)	0.0063 (8)	0.0067 (9)	0.0022 (8)
O15	0.0125 (10)	0.0332 (12)	0.0091 (10)	0.0071 (8)	0.0035 (9)	0.0043 (8)
O16	0.0265 (12)	0.0206 (11)	0.0132 (11)	0.0038 (9)	−0.0011 (10)	0.0027 (8)
O17	0.0107 (10)	0.0488 (15)	0.0182 (12)	0.0049 (10)	0.0060 (10)	0.0052 (10)
O18	0.0298 (14)	0.0369 (15)	0.0294 (14)	0.0125 (11)	0.0023 (12)	−0.0028 (11)

Tb1—O1i	2.508 (2)	O4—Tb2iii	2.387 (2)
Tb1—O2	2.400 (2)	C8—O5	1.232 (3)
Tb1—O6	2.378 (2)	C8—O6	1.287 (3)
Tb1—O7	2.426 (2)	O7—H7B	0.8706
Tb1—O8	2.406 (2)	O7—H7A	0.8392
Tb1—O9	2.431 (2)	O8—H8A	0.8514
Tb1—O12	2.590 (2)	O8—H8B	0.8583
Tb1—O13	2.489 (2)	O9—H9A	0.8538
Tb1—N1	2.534 (2)	O9—H9B	0.8526
Tb2—O3ii	2.365 (2)	N2—C13	1.339 (4)
Tb2—O4iii	2.387 (2)	N2—C9	1.343 (4)
Tb2—O10iv	2.336 (2)	C9—C10	1.404 (4)
Tb2—O11	2.403 (2)	C9—C14	1.523 (4)
Tb2—O15	2.384 (2)	C10—C11	1.394 (4)
Tb2—O16	2.430 (2)	C10—H10A	0.9300
Tb2—O17	2.358 (2)	C11—C12	1.397 (4)
Tb2—N2	2.507 (2)	C11—C15	1.520 (4)
N1—C1	1.342 (3)	C12—C13	1.400 (4)
N1—C5	1.351 (4)	C12—H12A	0.9300
C1—C2	1.396 (4)	C13—C16	1.521 (4)
C1—C6	1.525 (4)	C14—O10	1.257 (3)
C2—C3	1.402 (4)	C14—O11	1.263 (3)
C2—H2A	0.9300	O10—Tb2vii	2.336 (2)
C3—C4	1.402 (4)	C15—O12	1.262 (4)
C3—C7	1.522 (4)	C15—O13	1.265 (4)
C4—C5	1.390 (4)	C16—O14	1.241 (3)
C4—H4A	0.9300	C16—O15	1.282 (3)
C5—C8	1.517 (4)	O16—H16B	0.8149
C6—O1	1.241 (3)	O16—H16A	0.8500
C6—O2	1.285 (3)	O17—H17B	0.8253
O1—Tb1v	2.508 (2)	O17—H17A	0.8714
C7—O3	1.250 (3)	O18—H18B	0.8298
C7—O4	1.266 (3)	O18—H18A	0.8749
O3—Tb2vi	2.365 (2)
O6—Tb1—O2	127.28 (7)	C2—C1—C6	124.2 (2)
O6—Tb1—O8	85.70 (8)	C1—C2—C3	117.8 (2)
O2—Tb1—O8	73.64 (8)	C1—C2—H2A	121.1
O6—Tb1—O7	80.97 (7)	C3—C2—H2A	121.1
O2—Tb1—O7	86.64 (8)	C2—C3—C4	119.5 (2)
O8—Tb1—O7	142.08 (8)	C2—C3—C7	120.4 (2)
O6—Tb1—O9	84.53 (7)	C4—C3—C7	120.0 (2)
O2—Tb1—O9	139.62 (7)	C5—C4—C3	118.6 (3)
O8—Tb1—O9	140.44 (8)	C5—C4—H4A	120.7
O7—Tb1—O9	73.38 (8)	C3—C4—H4A	120.7
O6—Tb1—O13	121.38 (7)	N1—C5—C4	121.7 (3)
O2—Tb1—O13	101.12 (7)	N1—C5—C8	113.2 (2)
O8—Tb1—O13	77.68 (8)	C4—C5—C8	125.1 (3)
O7—Tb1—O13	138.92 (7)	O1—C6—O2	125.8 (3)
O9—Tb1—O13	75.12 (7)	O1—C6—C1	120.0 (2)
O6—Tb1—O1i	146.61 (7)	O2—C6—C1	114.2 (2)
O2—Tb1—O1i	72.52 (7)	C6—O1—Tb1v	137.01 (18)
O8—Tb1—O1i	127.62 (7)	C6—O2—Tb1	127.35 (17)
O7—Tb1—O1i	73.14 (7)	O3—C7—O4	126.3 (3)
O9—Tb1—O1i	68.26 (8)	O3—C7—C3	116.7 (2)
O13—Tb1—O1i	71.10 (7)	O4—C7—C3	117.0 (2)
O6—Tb1—N1	64.09 (7)	C7—O3—Tb2vi	170.3 (2)
O2—Tb1—N1	63.37 (7)	C7—O4—Tb2iii	127.23 (17)
O8—Tb1—N1	70.91 (8)	O5—C8—O6	125.2 (3)
O7—Tb1—N1	71.31 (7)	O5—C8—C5	119.6 (3)
O9—Tb1—N1	135.54 (7)	O6—C8—C5	115.2 (2)
O13—Tb1—N1	147.75 (8)	C8—O6—Tb1	126.89 (18)
O1i—Tb1—N1	123.80 (7)	Tb1—O7—H7B	108.7
O6—Tb1—O12	70.06 (7)	Tb1—O7—H7A	126.8
O2—Tb1—O12	138.79 (8)	H7B—O7—H7A	105.2
O8—Tb1—O12	70.86 (8)	Tb1—O8—H8A	127.8
O7—Tb1—O12	134.56 (7)	Tb1—O8—H8B	98.2
O9—Tb1—O12	69.76 (7)	H8A—O8—H8B	121.3
O13—Tb1—O12	51.34 (7)	Tb1—O9—H9A	123.7
O1i—Tb1—O12	114.86 (7)	Tb1—O9—H9B	124.9
N1—Tb1—O12	121.18 (7)	H9A—O9—H9B	94.1
O6—Tb1—C15	95.68 (8)	C13—N2—C9	119.7 (2)
O2—Tb1—C15	123.08 (8)	C13—N2—Tb2	120.68 (19)
O8—Tb1—C15	74.82 (8)	C9—N2—Tb2	119.46 (18)
O7—Tb1—C15	141.56 (8)	N2—C9—C10	122.5 (2)
O9—Tb1—C15	68.18 (8)	N2—C9—C14	113.9 (2)
O13—Tb1—C15	25.73 (8)	C10—C9—C14	123.6 (2)
O1i—Tb1—C15	91.86 (8)	C11—C10—C9	117.8 (3)
N1—Tb1—C15	141.02 (8)	C11—C10—H10A	121.1
O12—Tb1—C15	25.80 (8)	C9—C10—H10A	121.1
O10iv—Tb2—O17	94.09 (8)	C10—C11—C12	119.4 (2)
O10iv—Tb2—O3ii	137.68 (8)	C10—C11—C15	120.4 (2)
O17—Tb2—O3ii	79.58 (8)	C12—C11—C15	120.2 (2)
O10iv—Tb2—O15	91.41 (8)	C11—C12—C13	119.1 (3)
O17—Tb2—O15	158.69 (7)	C11—C12—H12A	120.5
O3ii—Tb2—O15	82.50 (8)	C13—C12—H12A	120.5
O10iv—Tb2—O4iii	148.23 (7)	N2—C13—C12	121.4 (3)
O17—Tb2—O4iii	98.76 (8)	N2—C13—C16	113.4 (2)
O3ii—Tb2—O4iii	73.56 (7)	C12—C13—C16	125.2 (2)
O15—Tb2—O4iii	87.06 (7)	O10—C14—O11	126.2 (3)
O10iv—Tb2—O11	76.71 (8)	O10—C14—C9	117.3 (2)
O17—Tb2—O11	72.40 (7)	O11—C14—C9	116.6 (2)
O3ii—Tb2—O11	137.43 (8)	C14—O10—Tb2vii	150.1 (2)
O15—Tb2—O11	128.91 (7)	C14—O11—Tb2	124.96 (18)
O4iii—Tb2—O11	79.69 (8)	O12—C15—O13	121.2 (3)
O10iv—Tb2—O16	67.14 (8)	O12—C15—C11	119.3 (3)
O17—Tb2—O16	82.04 (8)	O13—C15—C11	119.4 (2)
O3ii—Tb2—O16	70.54 (8)	O12—C15—Tb1	63.24 (15)
O15—Tb2—O16	81.17 (8)	O13—C15—Tb1	58.67 (14)
O4iii—Tb2—O16	143.32 (7)	C11—C15—Tb1	168.1 (2)
O11—Tb2—O16	133.68 (8)	C15—O12—Tb1	90.96 (18)
O10iv—Tb2—N2	73.74 (7)	C15—O13—Tb1	95.60 (16)
O17—Tb2—N2	137.12 (8)	O14—C16—O15	125.0 (3)
O3ii—Tb2—N2	136.26 (8)	O14—C16—C13	119.9 (2)
O15—Tb2—N2	64.13 (8)	O15—C16—C13	115.2 (2)
O4iii—Tb2—N2	77.11 (7)	C16—O15—Tb2	126.57 (18)
O11—Tb2—N2	64.84 (7)	Tb2—O16—H16B	130.9
O16—Tb2—N2	126.24 (8)	Tb2—O16—H16A	124.3
C1—N1—C5	119.5 (2)	H16B—O16—H16A	99.5
C1—N1—Tb1	120.52 (17)	Tb2—O17—H17B	119.8
C5—N1—Tb1	119.27 (18)	Tb2—O17—H17A	124.3
N1—C1—C2	122.6 (2)	H17B—O17—H17A	99.1
N1—C1—C6	113.1 (2)	H18B—O18—H18A	98.3

D—H···A	D—H	H···A	D···A	D—H···A
O7—H7A···O14viii	0.84	1.86	2.700 (3)	174.4
O7—H7B···O2i	0.87	1.80	2.651 (3)	164.8
O8—H8A···O12iii	0.85	1.89	2.741 (3)	176.0
O8—H8B···O9ix	0.86	2.39	2.844 (3)	113.0
O9—H9A···O5viii	0.85	2.56	3.057 (3)	119.0
O9—H9A···O6viii	0.85	1.86	2.711 (3)	176.0
O9—H9B···O5viii	0.85	2.56	3.057 (3)	118.0
O16—H16A···O4viii	0.85	2.30	3.101 (3)	156.2
O16—H16B···O15x	0.81	1.96	2.766 (3)	171.0
O17—H17A···O18iv	0.87	1.84	2.705 (4)	173.9
O17—H17B···O5xi	0.82	1.95	2.759 (3)	163.6
O18—H18A···O14xii	0.87	2.04	2.911 (4)	175.7
O18—H18B···O13	0.83	1.92	2.745 (4)	167.1

Table 1

Selected bond lengths (Å)

Tb1—O1i	2.508 (2)
Tb1—O2	2.400 (2)
Tb1—O6	2.378 (2)
Tb1—O7	2.426 (2)
Tb1—O8	2.406 (2)
Tb1—O9	2.431 (2)
Tb1—O12	2.590 (2)
Tb1—O13	2.489 (2)
Tb1—N1	2.534 (2)
Tb2—O3ii	2.365 (2)
Tb2—O4iii	2.387 (2)
Tb2—O10iv	2.336 (2)
Tb2—O11	2.403 (2)
Tb2—O15	2.384 (2)
Tb2—O16	2.430 (2)
Tb2—O17	2.358 (2)
Tb2—N2	2.507 (2)

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

Table 2

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O7—H7A⋯O14v	0.84	1.86	2.700 (3)	174.4
O7—H7B⋯O2i	0.87	1.80	2.651 (3)	164.8
O8—H8A⋯O12iii	0.85	1.89	2.741 (3)	176.0
O8—H8B⋯O9vi	0.86	2.39	2.844 (3)	113.0
O9—H9A⋯O5v	0.85	2.56	3.057 (3)	119.0
O9—H9A⋯O6v	0.85	1.86	2.711 (3)	176.0
O9—H9B⋯O5v	0.85	2.56	3.057 (3)	118.0
O16—H16A⋯O4v	0.85	2.30	3.101 (3)	156.2
O16—H16B⋯O15vii	0.81	1.96	2.766 (3)	171.0
O17—H17A⋯O18iv	0.87	1.84	2.705 (4)	173.9
O17—H17B⋯O5viii	0.82	1.95	2.759 (3)	163.6
O18—H18A⋯O14ix	0.87	2.04	2.911 (4)	175.7
O18—H18B⋯O13	0.83	1.92	2.745 (4)	167.1

Symmetry codes: (i) ; (iii) ; (iv) ; (v) ; (vi) ; (vii) ; (viii) ; (ix) .