Bis­(tetra­butyl­ammonium) deca­iodo­tetramercurate(II), (Bu₄N)₂[Hg₄I₁₀]

(Bu₄N)₂[Hg₄I₁₀] is the first compound for which tetranuclear anions [Hg₄I₁₀]^2- are observed in its crystal structure. Charge balance is achieved by ordered [Bu₄N]⁺ cations.

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean [sigma](C-C) = 0.019 Å
• R factor = 0.038
• wR factor = 0.060
• Data-to-parameter ratio = 26.8

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level C:



GOODF_01  Alert C The least squares goodness of fit parameter lies
          outside the range 0.80 <> 2.00
          Goodness of fit given =      0.746

RINTA_01  Alert C The value of Rint is greater than 0.10
          Rint given   0.107

PLAT_360  Alert C Short  C(sp3)-C(sp3) Bond  C(11)  -   C(15)  =       1.42 Ang.


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 3 Alert Level C = Please check

---

S1. Comment

Halogenomercurate(II) anions show a wide variety of steric arrangements, dependent upon charge and size of the counter-cation(s) and the stoichiometry (Dean et al., 1994; Grdenic et al. 1965; House et al., 1994; Serezhkin et al., 2001). Up to now, only one compound has been reported for the Bu₄NI/HgI₂ system. (Bu₄N)[HgI₃] contains trigonal planar [HgI₃]⁻ units (Goggin et al., 1982).

Other discrete iodomercurate(II) anions with different cations that have been reported are the tetrahedral [HgI₄]⁻ and the octahedral [HgI₆]⁴⁻, as well as the dimeric [Hg₂I₆]²⁻ and the trimeric [Hg₃I₈]²⁻ units.

Recently, we have reported on the structure of (Et₄N)₂[Hg₄Cl₁₀] (Nockemann & Meyer, 2002). Bitetrahedral [Hg₂Cl₆]²⁻ anions built from two tetrahedra sharing one common edge have two slightly bent HgCl₂ molecules, with Cl—Hg—Cl angles of about 170°, attached to either side so that, in summa, it may be considered as the tetrameric [Hg₄Cl₁₀]²⁻ anion. The two terminal mercuric ions exhibit coordination number 2 + 1 in a T-shaped arrangement.

The tetrameric anion [Hg₄I₁₀]²⁻ in the crystal structure of (Bu₄N)₂[Hg₄I₁₀] may also be derived from bitetrahedral [Hg₂I₆]²⁻ units to which two HgI₂ molecules are again attached on either side. The two central tetrahedra are only slightly distorted with Hg—I distances ranging from 2.715 (1) to 2.910 (1) Å. The outer HgI₂ molecules show considerably shorter distances ranging between 2.617 (1) and 2.647 (1) Å, with I—Hg—I angles of 149.09 (5) and 142.93 (4)°, but the distances to the iodide ions of the edges shared with the central [Hg₂I₆]²⁻ are, in turn, much longer, 3.080 (1)–3.316 (1) Å. In summary, in the tetrameric anion [Hg₄I₁₀]²⁻, all mercuric ions may be considered as having coordination number 4, and all tetrahedra share common edges, in contrast to the situation in the tetrameric [Hg₄Cl₁₀]²⁻ where coordination numbers are 4 and 3 (twice each), respectively.

In (Bu₄N)₂[Hg₄I₁₀], charge balance is achieved by two crystallographically independent, perfectly ordered tetrahedral [Bu₄N]⁺ cations which are arranged in the crystal structure, together with the anions in a 2:1 ratio, as Fig. 1 illustrates.

S2. Experimental

1 mmol (0.369 g) of tetrabutylammonium iodide, (Bu₄)NI, and 2 mmol (0.454 g) of mercuric iodide HgI₂, were dissolved by stirring in 50 ml me thanol at 323 K until a clear solution was obtained. Yellow single crystals were obtained when the solution was allowed to sit at room temperature for 2 d.

S3. Refinement

The positions of the H atoms were calculated.

Computing details

Data collection: X-AREA (Stoe & Cie, 2001); cell refinement: X-STEP32 (Stoe & Cie, 2000); data reduction: X-RED (Stoe & Cie, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: DIAMOND (Brandenburg, Bonn, 1999); software used to prepare material for publication: SHELXL97.

Figures

	Fig. 1. Packing diagram of (Bu4N)2[Hg4I10] viewed down the a axis.
	Fig. 2. View on the [Hg4I10]^2− anions, showing 50% probability displacement ellipsoids and the atom-numbering scheme.
	Fig. 3. View on the one [Bu4N]^+ cation, showing 50% probability displacement ellipsoids.
	Fig. 4. View on the second [Bu4N]^+ cation, showing 50% probability displacement ellipsoids.

(I)

Crystal data

(C16H36N)2[Hg4I10]	Z = 2
Mr = 2556.28	F(000) = 2256
Triclinic, P1	Dx = 2.873 Mg m^−3
Hall symbol: -P1	Mo Kα radiation, λ = 0.71073 Å
a = 11.681 Å	Cell parameters from 37776 reflections
b = 15.770 Å	θ = 3.6–59.3°
c = 18.288 Å	µ = 15.60 mm^−1
α = 114.33°	T = 293 K
β = 104.18°	Prismatic needles, yellow
γ = 90.18°	0.3 × 0.15 × 0.1 mm
V = 2955.3 Å^3

Data collection

Stoe Imaging Plate Diffraction System, IPDS-I diffractometer	11615 independent reflections
Radiation source: fine-focus sealed tube	5987 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.107
ϕ scans	θmax = 26.0°, θmin = 1.8°
Absorption correction: numerical X-SHAPE (Stoe & Cie, 1998)	h = −12→14
Tmin = 0.075, Tmax = 0.210	k = −19→19
37776 measured reflections	l = −22→22

Refinement

Refinement on F^2	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F^2 > 2σ(F^2)] = 0.038	H-atom parameters constrained
wR(F^2) = 0.060	w = 1/[σ^2(Fo^2)] where P = (Fo^2 + 2Fc^2)/3
S = 0.75	(Δ/σ)max = 0.001
11615 reflections	Δρmax = 1.23 e Å^−3
434 parameters	Δρmin = −1.22 e Å^−3
0 restraints	Extinction correction: SHELXL97, Fc^*=kFc[1+0.001xFc^2λ^3/sin(2θ)]^-1/4
Primary atom site location: structure-invariant direct methods	Extinction coefficient: 0.001058 (11)

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
Hg1	0.38130 (5)	0.22200 (4)	0.90692 (3)	0.04672 (14)
Hg2	0.24241 (5)	0.26466 (4)	0.48016 (3)	0.05259 (15)
Hg3	0.17054 (5)	0.26822 (4)	0.25961 (3)	0.04796 (14)
Hg4	0.32403 (5)	0.23488 (4)	0.69056 (3)	0.05249 (15)
I1	0.21389 (6)	0.11121 (5)	0.73107 (4)	0.03533 (18)
I2	0.55075 (7)	0.11387 (6)	0.92013 (5)	0.0418 (2)
I3	0.37342 (7)	0.37437 (6)	0.44126 (5)	0.0456 (2)
I4	0.27812 (8)	0.14200 (6)	0.16275 (6)	0.0498 (2)
I5	0.04493 (7)	0.40968 (7)	0.28468 (6)	0.0537 (2)
I6	0.24863 (8)	0.33706 (7)	0.99093 (6)	0.0580 (3)
I7	0.40076 (7)	0.15357 (5)	0.54342 (5)	0.03795 (19)
I8	0.49995 (7)	0.34043 (6)	0.83231 (5)	0.0405 (2)
I9	0.05955 (7)	0.16003 (6)	0.34222 (5)	0.0404 (2)
I10	0.16514 (7)	0.34376 (5)	0.62856 (5)	0.03698 (19)
N1	0.6372 (8)	0.3455 (6)	0.2355 (6)	0.033 (2)
C1	0.6908 (9)	0.3962 (7)	0.1937 (6)	0.032 (3)
H1B	0.7112	0.4619	0.2322	0.039*
H1A	0.7642	0.3709	0.1843	0.039*
C3	0.7231 (9)	0.3759 (8)	0.3206 (6)	0.033 (3)
H3B	0.8025	0.3667	0.3136	0.040*
H3A	0.7221	0.4426	0.3520	0.040*
C2	0.6193 (10)	0.2403 (7)	0.1847 (7)	0.033 (3)
H2B	0.5823	0.2122	0.2128	0.040*
H2A	0.5634	0.2264	0.1312	0.040*
C6	0.7271 (11)	0.1935 (8)	0.1690 (8)	0.048 (3)
H6B	0.7912	0.2175	0.2201	0.057*
H6A	0.7527	0.2066	0.1278	0.057*
C5	0.6128 (10)	0.3898 (8)	0.1117 (6)	0.035 (3)
H5B	0.5402	0.4171	0.1202	0.042*
H5A	0.5914	0.3245	0.0722	0.042*
C9	0.6784 (11)	0.4418 (8)	0.0762 (7)	0.041 (3)
H9B	0.6214	0.4513	0.0326	0.049*
H9A	0.7137	0.5029	0.1200	0.049*
C13	0.7760 (11)	0.3889 (9)	0.0405 (8)	0.047 (3)
H13C	0.8149	0.4247	0.0200	0.056*
H13B	0.7412	0.3292	−0.0044	0.056*
H13A	0.8330	0.3795	0.0833	0.056*
C4	0.5129 (10)	0.3763 (8)	0.2415 (7)	0.036 (3)
H4B	0.4624	0.3586	0.1856	0.043*
H4A	0.4783	0.3421	0.2660	0.043*
C8	0.5121 (10)	0.4802 (8)	0.2922 (7)	0.041 (3)
H8B	0.5518	0.5164	0.2717	0.049*
H8A	0.5530	0.4982	0.3503	0.049*
C12	0.3780 (11)	0.4986 (8)	0.2825 (8)	0.043 (3)
H12B	0.3399	0.4851	0.2248	0.052*
H12A	0.3373	0.4568	0.2973	0.052*
C7	0.7001 (11)	0.3270 (10)	0.3713 (8)	0.053 (3)
H7B	0.7018	0.2601	0.3415	0.064*
H7A	0.6221	0.3371	0.3808	0.064*
C11	0.799 (2)	0.3666 (12)	0.4578 (10)	0.109 (8)
H11B	0.8769	0.3628	0.4477	0.131*
H11A	0.7916	0.4321	0.4893	0.131*
C16	0.3674 (12)	0.5986 (9)	0.3374 (9)	0.055 (4)
H16C	0.2849	0.6078	0.3306	0.066*
H16B	0.4061	0.6400	0.3220	0.066*
H16A	0.4044	0.6119	0.3946	0.066*
C10	0.6987 (12)	0.0892 (8)	0.1382 (9)	0.051 (3)
H10B	0.6284	0.0679	0.0911	0.061*
H10A	0.6793	0.0773	0.1820	0.061*
C14	0.7961 (13)	0.0320 (10)	0.1119 (10)	0.066 (4)
H14C	0.7709	−0.0330	0.0944	0.079*
H14B	0.8661	0.0519	0.1581	0.079*
H14A	0.8135	0.0405	0.0666	0.079*
N2	0.1871 (7)	0.8544 (6)	0.2661 (5)	0.025 (2)
C25	0.1782 (11)	0.9389 (10)	0.4984 (7)	0.053 (4)
H25B	0.2333	0.9385	0.5475	0.064*
H25A	0.1729	1.0037	0.5076	0.064*
C21	0.2272 (11)	0.8888 (9)	0.4227 (7)	0.044 (3)
H21B	0.3102	0.9122	0.4367	0.053*
H21A	0.2222	0.8221	0.4083	0.053*
C17	0.1578 (10)	0.9046 (7)	0.3490 (6)	0.032 (3)
H17B	0.1677	0.9713	0.3642	0.039*
H17A	0.0742	0.8868	0.3402	0.039*
C19	0.1084 (9)	0.8829 (7)	0.2042 (6)	0.029 (2)
H19B	0.1254	0.9501	0.2238	0.035*
H19A	0.0265	0.8704	0.2032	0.035*
C23	0.1188 (11)	0.8357 (8)	0.1153 (7)	0.041 (3)
H23B	0.2011	0.8448	0.1155	0.049*
H23A	0.0954	0.7689	0.0930	0.049*
C27	0.0417 (10)	0.8747 (10)	0.0600 (7)	0.047 (3)
H27B	0.0689	0.9406	0.0805	0.056*
H27A	−0.0394	0.8698	0.0634	0.056*
C31	0.0431 (13)	0.8249 (12)	−0.0300 (8)	0.065 (4)
H31C	−0.0072	0.8525	−0.0621	0.078*
H31B	0.0146	0.7598	−0.0512	0.078*
H31A	0.1229	0.8306	−0.0341	0.078*
C20	0.3188 (9)	0.8807 (7)	0.2771 (6)	0.028 (2)
H20B	0.3382	0.8428	0.2255	0.034*
H20A	0.3661	0.8644	0.3200	0.034*
C24	0.3562 (9)	0.9847 (8)	0.3008 (7)	0.034 (3)
H24B	0.3246	0.9993	0.2536	0.041*
H24A	0.3258	1.0250	0.3466	0.041*
C28	0.4894 (9)	0.9998 (8)	0.3257 (7)	0.035 (3)
H28B	0.5193	0.9524	0.2832	0.042*
H28A	0.5199	0.9938	0.3775	0.042*
C18	0.1714 (9)	0.7474 (6)	0.2367 (7)	0.029 (2)
H18B	0.1962	0.7178	0.1859	0.035*
H18A	0.2232	0.7321	0.2787	0.035*
C22	0.0441 (10)	0.7069 (8)	0.2204 (8)	0.044 (3)
H22B	0.0166	0.7391	0.2698	0.053*
H22A	−0.0073	0.7172	0.1751	0.053*
C29	0.0592 (15)	0.8946 (12)	0.4877 (10)	0.079 (5)
H29C	0.0325	0.9285	0.5365	0.095*
H29B	0.0643	0.8308	0.4799	0.095*
H29A	0.0038	0.8959	0.4399	0.095*
C26	0.0357 (11)	0.6017 (8)	0.1980 (7)	0.040 (3)
H26B	0.0816	0.5925	0.2456	0.048*
H26A	−0.0466	0.5784	0.1870	0.048*
C30	0.0794 (13)	0.5455 (9)	0.1241 (9)	0.065 (4)
H30C	0.0738	0.4808	0.1145	0.078*
H30B	0.1608	0.5681	0.1343	0.078*
H30A	0.0318	0.5514	0.0759	0.078*
C32	0.5330 (11)	1.0989 (9)	0.3371 (8)	0.052 (4)
H32C	0.6183	1.1080	0.3535	0.063*
H32B	0.5036	1.1456	0.3795	0.063*
H32A	0.5039	1.1042	0.2855	0.063*
C15	0.789 (2)	0.316 (2)	0.5052 (16)	0.167 (12)
H15C	0.8509	0.3418	0.5566	0.200*
H15B	0.7965	0.2516	0.4742	0.200*
H15A	0.7129	0.3218	0.5170	0.200*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Hg1	0.0433 (3)	0.0550 (3)	0.0383 (3)	0.0149 (3)	0.0130 (2)	0.0152 (2)
Hg2	0.0576 (3)	0.0578 (4)	0.0441 (3)	−0.0034 (3)	0.0078 (3)	0.0267 (3)
Hg3	0.0431 (3)	0.0532 (3)	0.0524 (3)	0.0132 (3)	0.0159 (3)	0.0253 (3)
Hg4	0.0562 (3)	0.0607 (4)	0.0398 (3)	−0.0009 (3)	0.0082 (3)	0.0234 (3)
I1	0.0272 (4)	0.0453 (5)	0.0307 (4)	0.0036 (3)	0.0080 (3)	0.0134 (3)
I2	0.0395 (4)	0.0408 (5)	0.0414 (4)	0.0058 (4)	0.0083 (4)	0.0154 (4)
I3	0.0438 (5)	0.0546 (5)	0.0454 (5)	0.0025 (4)	0.0118 (4)	0.0281 (4)
I4	0.0427 (5)	0.0526 (5)	0.0523 (5)	0.0076 (4)	0.0147 (4)	0.0195 (4)
I5	0.0343 (5)	0.0531 (5)	0.0883 (7)	0.0099 (4)	0.0172 (5)	0.0437 (5)
I6	0.0442 (5)	0.0711 (6)	0.0472 (5)	0.0179 (5)	0.0187 (4)	0.0104 (5)
I7	0.0405 (4)	0.0391 (5)	0.0356 (4)	0.0105 (4)	0.0124 (3)	0.0160 (4)
I8	0.0414 (5)	0.0396 (5)	0.0367 (4)	0.0062 (4)	0.0090 (4)	0.0133 (4)
I9	0.0476 (5)	0.0369 (4)	0.0372 (4)	−0.0004 (4)	0.0096 (4)	0.0172 (4)
I10	0.0357 (4)	0.0334 (4)	0.0378 (4)	0.0063 (4)	0.0109 (4)	0.0107 (4)
N1	0.025 (5)	0.033 (5)	0.037 (5)	0.003 (4)	0.007 (4)	0.012 (4)
C1	0.027 (6)	0.033 (6)	0.038 (6)	−0.010 (5)	0.014 (5)	0.014 (5)
C3	0.028 (6)	0.034 (6)	0.031 (6)	0.002 (5)	0.003 (5)	0.012 (5)
C2	0.033 (6)	0.028 (6)	0.034 (6)	0.006 (5)	0.005 (5)	0.012 (5)
C6	0.042 (7)	0.043 (7)	0.044 (7)	−0.002 (6)	0.014 (6)	0.003 (6)
C5	0.041 (7)	0.044 (7)	0.024 (6)	0.000 (6)	0.015 (5)	0.016 (5)
C9	0.048 (7)	0.029 (6)	0.041 (7)	0.009 (6)	0.014 (6)	0.010 (5)
C13	0.055 (8)	0.050 (8)	0.047 (7)	0.025 (7)	0.033 (7)	0.020 (6)
C4	0.030 (6)	0.045 (7)	0.042 (7)	0.004 (5)	0.016 (5)	0.023 (6)
C8	0.038 (7)	0.045 (7)	0.040 (7)	0.010 (6)	0.017 (6)	0.015 (6)
C12	0.041 (7)	0.043 (7)	0.057 (8)	0.014 (6)	0.027 (6)	0.024 (6)
C7	0.047 (8)	0.078 (10)	0.044 (8)	0.022 (7)	0.014 (6)	0.035 (7)
C11	0.23 (3)	0.068 (11)	0.049 (10)	0.010 (14)	0.052 (13)	0.033 (9)
C16	0.065 (10)	0.047 (8)	0.062 (9)	0.034 (7)	0.039 (8)	0.020 (7)
C10	0.050 (8)	0.038 (7)	0.069 (9)	0.014 (6)	0.020 (7)	0.025 (7)
C14	0.068 (10)	0.051 (9)	0.085 (11)	0.021 (8)	0.032 (9)	0.029 (8)
N2	0.025 (5)	0.021 (5)	0.030 (5)	0.012 (4)	0.011 (4)	0.010 (4)
C25	0.048 (8)	0.074 (9)	0.029 (6)	−0.020 (7)	0.011 (6)	0.013 (6)
C21	0.046 (7)	0.059 (8)	0.035 (7)	0.015 (7)	0.020 (6)	0.023 (6)
C17	0.033 (6)	0.030 (6)	0.038 (6)	0.005 (5)	0.019 (5)	0.013 (5)
C19	0.025 (6)	0.024 (6)	0.036 (6)	0.004 (5)	0.002 (5)	0.013 (5)
C23	0.051 (8)	0.043 (7)	0.027 (6)	0.016 (6)	0.016 (6)	0.011 (5)
C27	0.028 (6)	0.079 (10)	0.042 (7)	0.008 (7)	0.000 (6)	0.038 (7)
C31	0.056 (9)	0.104 (13)	0.047 (8)	0.029 (9)	0.015 (7)	0.043 (9)
C20	0.033 (6)	0.036 (6)	0.027 (5)	0.019 (5)	0.020 (5)	0.016 (5)
C24	0.026 (6)	0.043 (7)	0.039 (6)	−0.001 (5)	0.003 (5)	0.026 (6)
C28	0.030 (6)	0.036 (6)	0.044 (7)	0.010 (5)	0.017 (5)	0.019 (6)
C18	0.027 (6)	0.016 (5)	0.042 (6)	0.006 (5)	0.001 (5)	0.014 (5)
C22	0.036 (7)	0.039 (7)	0.055 (8)	−0.001 (6)	0.006 (6)	0.021 (6)
C29	0.091 (12)	0.089 (12)	0.057 (10)	−0.018 (10)	0.030 (9)	0.026 (9)
C26	0.038 (7)	0.036 (7)	0.047 (7)	0.007 (6)	0.012 (6)	0.018 (6)
C30	0.074 (10)	0.044 (8)	0.064 (9)	0.000 (8)	0.039 (8)	0.001 (7)
C32	0.037 (7)	0.055 (8)	0.052 (8)	−0.023 (7)	−0.009 (6)	0.022 (7)
C15	0.14 (2)	0.25 (3)	0.12 (2)	−0.01 (2)	0.031 (17)	0.09 (2)

Geometric parameters (Å, º)

Hg1—I6	2.6347 (11)	C5—C9	1.536 (14)
Hg1—I2	2.6476 (10)	C9—C13	1.530 (15)
Hg1—I1	3.0800 (9)	C4—C8	1.516 (16)
Hg1—I8	3.2065 (10)	C8—C12	1.574 (16)
Hg2—I3	2.7152 (9)	C12—C16	1.507 (16)
Hg2—I9	2.7489 (10)	C7—C11	1.58 (2)
Hg2—I10	2.8554 (9)	C11—C15	1.42 (3)
Hg2—I7	2.9103 (10)	C10—C14	1.503 (18)
Hg3—I5	2.6167 (11)	N2—C19	1.497 (13)
Hg3—I4	2.6231 (11)	N2—C17	1.519 (12)
Hg3—I9	3.1534 (9)	N2—C20	1.535 (12)
Hg3—I3	3.3150 (10)	N2—C18	1.541 (12)
Hg4—I8	2.7435 (10)	C25—C29	1.486 (17)
Hg4—I1	2.7659 (9)	C25—C21	1.535 (16)
Hg4—I7	2.8346 (9)	C21—C17	1.510 (16)
Hg4—I10	2.8759 (11)	C19—C23	1.520 (14)
N1—C3	1.508 (13)	C23—C27	1.510 (16)
N1—C2	1.514 (13)	C27—C31	1.509 (17)
N1—C1	1.534 (12)	C20—C24	1.545 (14)
N1—C4	1.548 (14)	C24—C28	1.499 (15)
C1—C5	1.515 (15)	C28—C32	1.556 (15)
C3—C7	1.497 (15)	C18—C22	1.526 (14)
C2—C6	1.490 (16)	C22—C26	1.532 (15)
C6—C10	1.507 (16)	C26—C30	1.492 (16)
I6—Hg1—I2	142.91 (4)	C3—N1—C4	111.6 (8)
I6—Hg1—I1	104.66 (3)	C2—N1—C4	106.7 (8)
I2—Hg1—I1	104.76 (3)	C1—N1—C4	109.1 (8)
I6—Hg1—I8	104.08 (3)	C5—C1—N1	116.0 (8)
I2—Hg1—I8	99.08 (3)	C7—C3—N1	116.1 (9)
I1—Hg1—I8	87.89 (2)	C6—C2—N1	117.1 (9)
I3—Hg2—I9	108.93 (3)	C2—C6—C10	109.5 (9)
I3—Hg2—I10	120.18 (3)	C1—C5—C9	110.4 (9)
I9—Hg2—I10	112.23 (3)	C13—C9—C5	112.9 (10)
I3—Hg2—I7	108.25 (3)	C8—C4—N1	114.9 (9)
I9—Hg2—I7	114.09 (3)	C4—C8—C12	107.0 (9)
I10—Hg2—I7	92.33 (3)	C16—C12—C8	111.2 (10)
I5—Hg3—I4	149.08 (4)	C3—C7—C11	109.3 (11)
I5—Hg3—I9	101.10 (3)	C15—C11—C7	111.9 (18)
I4—Hg3—I9	103.60 (3)	C6—C10—C14	115.3 (11)
I5—Hg3—I3	94.43 (3)	C19—N2—C17	108.2 (8)
I4—Hg3—I3	105.20 (3)	C19—N2—C20	111.1 (7)
I9—Hg3—I3	86.82 (2)	C17—N2—C20	109.4 (7)
I8—Hg4—I1	104.75 (3)	C19—N2—C18	111.5 (8)
I8—Hg4—I7	114.82 (3)	C17—N2—C18	110.9 (8)
I1—Hg4—I7	115.92 (3)	C20—N2—C18	105.7 (7)
I8—Hg4—I10	113.95 (3)	C29—C25—C21	112.7 (11)
I1—Hg4—I10	114.20 (3)	C17—C21—C25	110.7 (10)
I7—Hg4—I10	93.49 (3)	C21—C17—N2	118.5 (9)
Hg4—I1—Hg1	84.53 (2)	N2—C19—C23	116.4 (9)
Hg2—I3—Hg3	80.86 (3)	C27—C23—C19	111.6 (10)
Hg4—I7—Hg2	86.95 (3)	C23—C27—C31	113.2 (11)
Hg4—I8—Hg1	82.50 (3)	N2—C20—C24	115.9 (8)
Hg2—I9—Hg3	83.38 (2)	C28—C24—C20	107.4 (9)
Hg2—I10—Hg4	87.22 (3)	C24—C28—C32	110.0 (10)
C3—N1—C2	113.0 (9)	C22—C18—N2	113.7 (9)
C3—N1—C1	104.9 (8)	C26—C22—C18	111.4 (10)
C2—N1—C1	111.6 (8)	C30—C26—C22	113.8 (10)