Dineodymium di­hydrogen [alpha]-hexa­molyb­do­platinate(IV) tetra­deca­hy­drate, Nd₂[H₂[alpha]-PtMo₆O₂₄]·14H₂O

The least protonated hexamolybdoplatinate(IV) polyanion, [H₂[alpha]-PtMo₆O₂₄]^6-, is isolated by using Nd³⁺ as a counter-cation. Two O atoms of the central PtO₆ octahedron are protonated. The Mo-Mo distances are 3.244 (2), 3.295 (2) and 3.393 (1) Å, and the Pt-Mo distances are 3.251 (1), 3.332 (2) and 3.338 (1) Å. The anion has the Pt atom on an inversion centre and has close to m symmetry, with Pt-O bond lengths in the range 2.002 (8)-2.015 (8) Å and Mo-O bond lengths in the ranges 1.689 (9)-1.747 (8), 1.890 (8)-2.037 (8) and 2.109 (8)-2.384 (8) Å.

S1. Comment

Crystallograpic studies of the hexamolybdoplatinate(IV) polyanions [H₆α-PtMo₆O₂₄]²⁻ (Lee, 1994), [H_4.5α-PtMo₆O₂₄]^3.5−, [H₄β-PtMo₆O₂₄]⁴⁻ and [H_3.5α-PtMo₆O₂₄]^4.5− (Lee & Sasaki, 1994; Joo et al., 1994) have been reported previously. The behaviour of gradual protonation of the polyanion and geometric isomerism in Anderson-type heteropolyanions was only found in this polyanion system. The [H₆α-PtMo₆O₂₄]²⁻, [H_4.5α-PtMo₆O₂₄]^3.5−, [H₄β-PtMo₆O₂₄]⁴⁻ and [H_3.5α-PtMo₆O₂₄]^4.5− polyanion species were isolated at pH 0.7, 2.5, 5.4 and 6.4, respectively. It seems that the [H₂α-PtMo₆O₂₄]⁶⁻ species were isolated above pH 8.0, from the process of protonation in this polyanion system. However, it was isolated at pH 3.2 by using Nd³⁺ as the counter-ion.

The present polyanion, [H₂α-PtMo₆O₂₄]⁶⁻, has the Pt atom on an inversion centre and has close to 3 m symmetry. The O atoms in the anion can be divided into three groups, O_t, O_b and O_c, where O_t represents a terminal O atom bound to one Mo atom, O_b represents a bridging O atom bound to two Mo atoms and O_c represents a central O atom coordinated to both the Pt and the two Mo atoms. The position of the H atoms, as expected, could not be observed even in the electron-density difference maps. The attached positions of the H atoms were determined from the unusually long Mo—O distances. It was concluded that the H atoms of the polyanion are bound to the Oc1 atoms from the Mo1—Oc1 (2.384 Å) and Mo2—Oc1 (2.345 Å) distances, which are longer than the Mo1—Oc3 (2.131 Å), Mo2—Oc2 (2.209 Å), Mo3—Oc2 (2.109 Å) and Mo3—Oc3 (2.218 Å) distances. The average bond-distance elongation of Mo—O_c by protonation is about 0.197 Å. This value agrees well with those of the same family of polyanions. The H atom of Oc1 does not contribute to the interanion hydrogen bond. The Mo—O_t bond distances of the O_t atoms coordinated to Nd³⁺ show elongation.

The Nd³⁺ cation achieves tricapped trigonal prismatic coordination, with Ob4, Ot7 and Ot8 forming one base triangle, OW1, OW3 and Ot12 forming the other, and OW2, OW4 and OW5 capping the side faces. The bond distances between Nd and OW(1—5) atoms are in the range of 2.451–2.521 Å. The average Nd—O distance is 2.50 Å, which agrees with the typical lanthanide–O bond distance. Of the seven independent water molecules in the crystal structure, five are bonded to the Nd³⁺ ion. The remaining two water molecules in the unit cell only fill the empty space like zeolitic water. The [H₂α-PtMo₆O₂₄]⁶⁻ polyanion forms infinite three-dimensional networks with surrounding polyanions via six Nd³⁺ ions.

S2. Experimental

The title compound was prepared by mixing a hot aqueous solution of [H₂α-PtMo₆O₂₄]⁸⁻ (0.5 mM/20 ml) and Nd(NO₃)₃·6H₂O (0.1 mM/20 ml). The pH was adjusted to 3.2 by adding 3.0 M HNO₃. The solution was concentrated to about 20 ml by heating in a water bath. After a day, monoclinic grey crystals were obtained at room temperature.

S3. Refinement

The largest difference peak lies 2.93 Å from the nearest atom (OW5) and 4.66 Å from the Nd atom. It may represent an additional partially occupied disordered water molecule site.

Computing details

Data collection: STADI4 (Stoe & Cie, 1996); cell refinement: STADI4; data reduction: X-RED (Stoe & Cie, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 1990); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); software used to prepare material for publication: SHELXL97.

(I)

Crystal data

Nd2[H2PtMo6O24]·14H2O	F(000) = 3136
Mr = 1697.45	Dx = 3.471 Mg m^−3
Monoclinic, C2/c	Mo Kα radiation, λ = 0.71069 Å
a = 21.079 (2) Å	Cell parameters from 28 reflections
b = 10.324 (4) Å	θ = 10.0–11.4°
c = 15.8637 (18) Å	µ = 9.78 mm^−1
β = 109.780 (9)°	T = 298 K
V = 3248.5 (13) Å^3	Monoclinic, grey
Z = 4	0.12 × 0.08 × 0.06 mm

Data collection

Stoe Stadi-4 diffractometer	2851 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	Rint = 0.000
Graphite monochromator	θmax = 27.5°, θmin = 2.1°
ω/2θ scans	h = −27→25
Absorption correction: numerical (stoe, 1996) ?	k = 0→13
Tmin = 0.185, Tmax = 0.340	l = 0→20
3719 measured reflections	3 standard reflections every 60 min
3719 independent reflections	intensity decay: 5.0%

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F^2 > 2σ(F^2)] = 0.050	H-atom parameters not refined
wR(F^2) = 0.120	Calculated w = 1/[σ^2(Fo^2) + (0.0476P)^2 + 51.4635P] where P = (Fo^2 + 2Fc^2)/3
S = 1.13	(Δ/σ)max < 0.001
3719 reflections	Δρmax = 2.68 e Å^−3
214 parameters	Δρmin = −2.09 e Å^−3
0 restraints

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
Pt	0.2500	0.7500	0.0000	0.01014 (15)
Nd	0.60036 (3)	0.72948 (6)	0.14767 (4)	0.01336 (16)
Mo1	0.30649 (6)	0.44624 (10)	0.01866 (7)	0.0126 (2)
Mo2	0.34703 (5)	0.97780 (10)	0.13068 (7)	0.0129 (2)
Mo3	0.40127 (5)	0.67833 (10)	0.13165 (7)	0.0113 (2)
OC1	0.2395 (4)	0.8838 (7)	0.0860 (5)	0.0121 (17)
OC2	0.3454 (4)	0.8169 (8)	0.0382 (5)	0.0118 (17)
OC3	0.2947 (4)	0.6138 (8)	0.0905 (5)	0.0132 (17)
OB4	0.3758 (5)	0.8218 (8)	0.2024 (6)	0.0151 (18)
OB5	0.2893 (4)	1.0649 (8)	0.0206 (6)	0.0160 (18)
OB6	0.3914 (4)	0.5510 (8)	0.0425 (5)	0.0155 (18)
OT7	0.4784 (4)	0.7326 (9)	0.1308 (6)	0.0193 (19)
OT8	0.4187 (5)	0.5889 (9)	0.2296 (6)	0.0180 (19)
OT9	0.3234 (5)	1.0609 (9)	0.2080 (6)	0.0199 (19)
OT10	0.4230 (5)	1.0412 (9)	0.1340 (7)	0.025 (2)
OT11	0.3283 (5)	0.3479 (9)	0.1091 (6)	0.023 (2)
OT12	0.3263 (5)	0.3598 (9)	−0.0638 (6)	0.0191 (19)
OW1	0.6800 (5)	0.8998 (9)	0.1321 (7)	0.026 (2)
OW2	0.7072 (5)	0.6308 (11)	0.2452 (7)	0.031 (2)
OW3	0.5420 (5)	0.7546 (11)	−0.0188 (6)	0.032 (2)
OW4	0.5474 (5)	0.9460 (10)	0.1262 (8)	0.035 (3)
OW5	0.5605 (5)	0.5054 (10)	0.0919 (7)	0.029 (2)
OW6	0.4049 (7)	0.8314 (11)	−0.0853 (7)	0.039 (3)
OW7	0.1763 (7)	0.8413 (11)	0.2088 (8)	0.041 (3)

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Pt	0.0102 (3)	0.0104 (3)	0.0100 (3)	0.0005 (2)	0.0036 (2)	−0.0001 (2)
Nd	0.0130 (3)	0.0156 (3)	0.0127 (3)	0.0007 (3)	0.0058 (2)	0.0006 (2)
Mo1	0.0151 (5)	0.0113 (5)	0.0121 (5)	0.0005 (4)	0.0057 (4)	−0.0014 (4)
Mo2	0.0128 (5)	0.0113 (5)	0.0157 (5)	0.0005 (4)	0.0060 (4)	−0.0012 (4)
Mo3	0.0104 (5)	0.0121 (5)	0.0115 (5)	0.0001 (4)	0.0039 (4)	−0.0008 (4)
OC1	0.019 (5)	0.006 (4)	0.012 (4)	0.001 (3)	0.005 (3)	0.000 (3)
OC2	0.011 (4)	0.013 (4)	0.009 (4)	−0.002 (3)	−0.001 (3)	0.002 (3)
OC3	0.014 (4)	0.016 (4)	0.011 (4)	0.001 (3)	0.007 (3)	−0.001 (3)
OB4	0.019 (5)	0.013 (4)	0.016 (4)	0.004 (4)	0.009 (4)	0.002 (3)
OB5	0.013 (4)	0.012 (4)	0.025 (5)	−0.001 (4)	0.009 (4)	0.003 (4)
OB6	0.012 (4)	0.018 (4)	0.013 (4)	−0.001 (4)	−0.001 (3)	−0.008 (3)
OT7	0.013 (4)	0.025 (5)	0.021 (4)	0.002 (4)	0.008 (4)	0.001 (4)
OT8	0.022 (5)	0.019 (4)	0.013 (4)	0.002 (4)	0.005 (4)	0.000 (3)
OT9	0.022 (5)	0.019 (5)	0.019 (4)	0.001 (4)	0.007 (4)	−0.004 (4)
OT10	0.018 (5)	0.019 (5)	0.039 (6)	−0.006 (4)	0.011 (4)	0.000 (4)
OT11	0.034 (6)	0.020 (5)	0.015 (4)	0.004 (4)	0.008 (4)	0.008 (4)
OT12	0.021 (5)	0.019 (5)	0.019 (4)	0.000 (4)	0.009 (4)	−0.009 (4)
OW1	0.026 (5)	0.024 (5)	0.035 (6)	−0.004 (4)	0.019 (5)	−0.004 (4)
OW2	0.016 (5)	0.050 (7)	0.028 (5)	0.016 (5)	0.010 (4)	0.012 (5)
OW3	0.027 (6)	0.046 (7)	0.019 (5)	0.014 (5)	0.005 (4)	0.013 (5)
OW4	0.026 (6)	0.023 (5)	0.057 (7)	0.009 (5)	0.013 (5)	0.014 (5)
OW5	0.035 (6)	0.032 (6)	0.027 (5)	−0.013 (5)	0.019 (5)	−0.009 (4)
OW6	0.058 (8)	0.037 (6)	0.026 (6)	−0.016 (6)	0.018 (5)	−0.004 (5)
OW7	0.053 (8)	0.033 (6)	0.034 (6)	0.001 (6)	0.012 (6)	−0.002 (5)

Geometric parameters (Å, º)

Pt—OC3^i	2.002 (8)	Mo1—OC3	2.131 (8)
Pt—OC3	2.002 (8)	Mo1—OC1^i	2.384 (8)
Pt—OC1^i	2.006 (8)	Mo1—Mo3	3.2437 (16)
Pt—OC1	2.006 (8)	Mo1—Mo2^i	3.3927 (14)
Pt—OC2^i	2.015 (8)	Mo2—OT9	1.703 (9)
Pt—OC2	2.015 (8)	Mo2—OT10	1.715 (9)
Pt—Mo3	3.2511 (11)	Mo2—OB4	1.947 (8)
Pt—Mo1	3.3318 (15)	Mo2—OB5	1.975 (9)
Pt—Mo2	3.3379 (12)	Mo2—OC2	2.209 (8)
Nd—OB4^ii	2.451 (8)	Mo2—OC1	2.345 (9)
Nd—OW4	2.470 (10)	Mo2—Mo3	3.2945 (18)
Nd—OW2	2.478 (10)	Mo3—OT7	1.723 (9)
Nd—OT7	2.494 (9)	Mo3—OT8	1.736 (9)
Nd—OW1	2.501 (10)	Mo3—OB6	1.890 (8)
Nd—OW5	2.518 (10)	Mo3—OB4	2.037 (8)
Nd—OW3	2.521 (9)	Mo3—OC2	2.109 (8)
Nd—OT12^iii	2.530 (9)	Mo3—OC3	2.218 (9)
Nd—OT8^ii	2.567 (9)	Mo3—Nd^ii	3.5521 (12)
Nd—Mo3^ii	3.5521 (12)	OC1—Mo1^i	2.384 (8)
Mo1—OT11	1.689 (9)	OB4—Nd^ii	2.451 (8)
Mo1—OT12	1.747 (8)	OB5—Mo1^i	1.904 (9)
Mo1—OB5^i	1.904 (9)	OT8—Nd^ii	2.567 (9)
Mo1—OB6	2.014 (9)	OT12—Nd^iii	2.530 (9)
OC3^i—Pt—OC3	180.0	OC1^i—Mo1—Pt	36.56 (19)
OC3^i—Pt—OC1^i	97.5 (3)	Mo3—Mo1—Pt	59.24 (3)
OC3—Pt—OC1^i	82.5 (3)	OT11—Mo1—Mo2	110.0 (3)
OC3^i—Pt—OC1	82.5 (3)	OT12—Mo1—Mo2	132.2 (3)
OC3—Pt—OC1	97.5 (3)	OB5^i—Mo1—Mo2	100.9 (3)
OC1^i—Pt—OC1	180.0	OB6—Mo1—Mo2	53.1 (2)
OC3^i—Pt—OC2^i	81.1 (3)	OC3—Mo1—Mo2	24.6 (2)
OC3—Pt—OC2^i	98.9 (3)	OC1^i—Mo1—Mo2	59.68 (19)
OC1^i—Pt—OC2^i	83.6 (3)	Mo3—Mo1—Mo2	28.81 (2)
OC1—Pt—OC2^i	96.4 (3)	Pt—Mo1—Mo2	30.607 (19)
OC3^i—Pt—OC2	98.9 (3)	OT9—Mo2—OT10	106.5 (5)
OC3—Pt—OC2	81.1 (3)	OT9—Mo2—OB4	96.0 (4)
OC1^i—Pt—OC2	96.4 (3)	OT10—Mo2—OB4	101.2 (4)
OC1—Pt—OC2	83.6 (3)	OT9—Mo2—OB5	99.4 (4)
OC2^i—Pt—OC2	180.0	OT10—Mo2—OB5	98.2 (4)
OC3^i—Pt—Mo3	137.9 (2)	OB4—Mo2—OB5	150.5 (4)
OC3—Pt—Mo3	42.1 (2)	OT9—Mo2—OC2	156.1 (4)
OC1^i—Pt—Mo3	88.3 (2)	OT10—Mo2—OC2	96.4 (4)
OC1—Pt—Mo3	91.7 (2)	OB4—Mo2—OC2	72.4 (3)
OC2^i—Pt—Mo3	141.0 (2)	OB5—Mo2—OC2	83.6 (3)
OC2—Pt—Mo3	39.0 (2)	OT9—Mo2—OC1	86.4 (4)
OC3^i—Pt—Mo1	142.4 (2)	OT10—Mo2—OC1	164.8 (4)
OC3—Pt—Mo1	37.6 (2)	OB4—Mo2—OC1	85.0 (3)
OC1^i—Pt—Mo1	45.1 (2)	OB5—Mo2—OC1	71.2 (3)
OC1—Pt—Mo1	134.9 (2)	OC2—Mo2—OC1	72.1 (3)
OC2^i—Pt—Mo1	89.7 (2)	OT9—Mo2—Mo3	130.9 (3)
OC2—Pt—Mo1	90.3 (2)	OT10—Mo2—Mo3	92.2 (3)
Mo3—Pt—Mo1	59.03 (3)	OB4—Mo2—Mo3	35.1 (2)
OC3^i—Pt—Mo2	89.5 (2)	OB5—Mo2—Mo3	122.7 (3)
OC3—Pt—Mo2	90.5 (2)	OC2—Mo2—Mo3	39.2 (2)
OC1^i—Pt—Mo2	136.2 (2)	OC1—Mo2—Mo3	84.93 (19)
OC1—Pt—Mo2	43.8 (2)	OT9—Mo2—Pt	122.4 (3)
OC2^i—Pt—Mo2	140.1 (2)	OT10—Mo2—Pt	131.1 (3)
OC2—Pt—Mo2	39.9 (2)	OB4—Mo2—Pt	77.6 (3)
Mo3—Pt—Mo2	59.98 (3)	OB5—Mo2—Pt	73.0 (3)
Mo1—Pt—Mo2	118.85 (3)	OC2—Mo2—Pt	35.8 (2)
Mo1—Pt—Mo2^i	61.15 (3)	OC1—Mo2—Pt	36.30 (19)
OB4^ii—Nd—OW4	73.5 (3)	Mo3—Mo2—Pt	58.70 (3)
OB4^ii—Nd—OW2	73.1 (3)	OT9—Mo2—Mo1	130.9 (3)
OW4—Nd—OW2	137.0 (4)	OT10—Mo2—Mo1	114.4 (3)
OB4^ii—Nd—OT7	88.0 (3)	OB4—Mo2—Mo1	51.3 (3)
OW4—Nd—OT7	64.6 (3)	OB5—Mo2—Mo1	100.3 (3)
OW2—Nd—OT7	139.3 (3)	OC2—Mo2—Mo1	26.9 (2)
OB4^ii—Nd—OW1	84.2 (3)	OC1—Mo2—Mo1	58.90 (19)
OW4—Nd—OW1	68.7 (3)	Mo3—Mo2—Mo1	28.32 (3)
OW2—Nd—OW1	81.5 (4)	Pt—Mo2—Mo1	30.545 (16)
OT7—Nd—OW1	133.1 (3)	OT7—Mo3—OT8	105.4 (4)
OB4^ii—Nd—OW5	129.2 (3)	OT7—Mo3—OB6	94.9 (4)
OW4—Nd—OW5	134.5 (4)	OT8—Mo3—OB6	103.7 (4)
OW2—Nd—OW5	88.1 (4)	OT7—Mo3—OB4	101.1 (4)
OT7—Nd—OW5	76.4 (3)	OT8—Mo3—OB4	84.8 (4)
OW1—Nd—OW5	140.1 (3)	OB6—Mo3—OB4	159.2 (4)
OB4^ii—Nd—OW3	147.5 (3)	OT7—Mo3—OC2	94.4 (4)
OW4—Nd—OW3	74.0 (4)	OT8—Mo3—OC2	152.7 (4)
OW2—Nd—OW3	135.6 (3)	OB6—Mo3—OC2	92.9 (3)
OT7—Nd—OW3	76.5 (3)	OB4—Mo3—OC2	72.9 (3)
OW1—Nd—OW3	86.0 (4)	OT7—Mo3—OC3	163.5 (4)
OW5—Nd—OW3	74.9 (4)	OT8—Mo3—OC3	89.5 (4)
OB4^ii—Nd—OT12^iii	133.7 (3)	OB6—Mo3—OC3	74.1 (3)
OW4—Nd—OT12^iii	125.8 (3)	OB4—Mo3—OC3	87.2 (3)
OW2—Nd—OT12^iii	65.8 (3)	OC2—Mo3—OC3	74.2 (3)
OT7—Nd—OT12^iii	137.7 (3)	OT7—Mo3—Mo1	129.9 (3)
OW1—Nd—OT12^iii	69.8 (3)	OT8—Mo3—Mo1	90.4 (3)
OW5—Nd—OT12^iii	70.8 (3)	OB6—Mo3—Mo1	35.0 (3)
OW3—Nd—OT12^iii	69.8 (3)	OB4—Mo3—Mo1	127.9 (3)
OB4^ii—Nd—OT8^ii	61.1 (3)	OC2—Mo3—Mo1	91.1 (2)
OW4—Nd—OT8^ii	115.9 (3)	OC3—Mo3—Mo1	40.8 (2)
OW2—Nd—OT8^ii	68.7 (3)	OT7—Mo3—Pt	130.0 (3)
OT7—Nd—OT8^ii	70.6 (3)	OT8—Mo3—Pt	124.1 (3)
OW1—Nd—OT8^ii	139.1 (3)	OB6—Mo3—Pt	80.9 (3)
OW5—Nd—OT8^ii	68.1 (3)	OB4—Mo3—Pt	78.7 (3)
OW3—Nd—OT8^ii	135.0 (3)	OC2—Mo3—Pt	37.0 (2)
OT12^iii—Nd—OT8^ii	118.2 (3)	OC3—Mo3—Pt	37.3 (2)
OB4^ii—Nd—Mo3^ii	33.8 (2)	Mo1—Mo3—Pt	61.73 (3)
OW4—Nd—Mo3^ii	96.7 (3)	OT7—Mo3—Mo2	91.2 (3)
OW2—Nd—Mo3^ii	68.5 (2)	OT8—Mo3—Mo2	118.1 (3)
OT7—Nd—Mo3^ii	75.8 (2)	OB6—Mo3—Mo2	134.3 (3)
OW1—Nd—Mo3^ii	115.6 (2)	OB4—Mo3—Mo2	33.3 (2)
OW5—Nd—Mo3^ii	95.5 (2)	OC2—Mo3—Mo2	41.4 (2)
OW3—Nd—Mo3^ii	152.1 (3)	OC3—Mo3—Mo2	88.0 (2)
OT12^iii—Nd—Mo3^ii	132.5 (2)	Mo1—Mo3—Mo2	122.87 (5)
OT8^ii—Nd—Mo3^ii	27.4 (2)	Pt—Mo3—Mo2	61.32 (3)
OT11—Mo1—OT12	105.3 (5)	OT7—Mo3—Nd^ii	106.4 (3)
OT11—Mo1—OB5^i	101.3 (4)	OT8—Mo3—Nd^ii	42.8 (3)
OT12—Mo1—OB5^i	102.7 (4)	OB6—Mo3—Nd^ii	143.7 (3)
OT11—Mo1—OB6	101.2 (4)	OB4—Mo3—Nd^ii	42.0 (2)
OT12—Mo1—OB6	89.6 (4)	OC2—Mo3—Nd^ii	113.8 (2)
OB5^i—Mo1—OB6	150.5 (4)	OC3—Mo3—Nd^ii	89.3 (2)
OT11—Mo1—OC3	94.6 (4)	Mo1—Mo3—Nd^ii	116.41 (4)
OT12—Mo1—OC3	156.2 (4)	Pt—Mo3—Nd^ii	105.35 (3)
OB5^i—Mo1—OC3	85.5 (4)	Mo2—Mo3—Nd^ii	75.29 (3)
OB6—Mo1—OC3	73.8 (3)	Pt—OC1—Mo2	99.9 (3)
OT11—Mo1—OC1^i	164.4 (4)	Pt—OC1—Mo1^i	98.4 (3)
OT12—Mo1—OC1^i	89.9 (4)	Mo2—OC1—Mo1^i	91.7 (3)
OB5^i—Mo1—OC1^i	71.4 (3)	Pt—OC2—Mo3	104.0 (4)
OB6—Mo1—OC1^i	82.0 (3)	Pt—OC2—Mo2	104.3 (4)
OC3—Mo1—OC1^i	71.4 (3)	Mo3—OC2—Mo2	99.4 (3)
OT11—Mo1—Mo3	92.0 (3)	Pt—OC3—Mo1	107.4 (4)
OT12—Mo1—Mo3	122.2 (3)	Pt—OC3—Mo3	100.6 (4)
OB5^i—Mo1—Mo3	127.8 (3)	Mo1—OC3—Mo3	96.4 (3)
OB6—Mo1—Mo3	32.6 (2)	Mo2—OB4—Mo3	111.6 (4)
OC3—Mo1—Mo3	42.8 (2)	Mo2—OB4—Nd^ii	144.1 (4)
OC1^i—Mo1—Mo3	82.6 (2)	Mo3—OB4—Nd^ii	104.2 (3)
OT11—Mo1—Pt	128.8 (3)	Mo1^i—OB5—Mo2	122.0 (4)
OT12—Mo1—Pt	125.6 (3)	Mo3—OB6—Mo1	112.4 (4)
OB5^i—Mo1—Pt	73.8 (3)	Mo3—OT7—Nd	159.3 (5)
OB6—Mo1—Pt	77.2 (2)	Mo3—OT8—Nd^ii	109.8 (4)
OC3—Mo1—Pt	35.0 (2)	Mo1—OT12—Nd^iii	157.4 (5)

Symmetry codes: (i) −x+1/2, −y+3/2, −z; (ii) −x+1, y, −z+1/2; (iii) −x+1, −y+1, −z.