[(8a,9,9a-[eta])-9-([eta]⁵-Cyclo­penta­dien­yl)-9-nickelafluoren­yl]([eta]⁵-penta­methyl­cyclo­penta­dien­yl)nickel(II)

The title compound, [Ni₂(C₅H₅)(C₁₀H₁₅)(C₁₂H₈)] or [Ni(C₁₀H₁₅){Ni(C₅H₅)(C₁₂H₈)}], is a rare example (and the first obtained from nickela­fluorenyl­lithium) of an analogue of nickelocene in which the central Ni atom is coordinated to one penta­methyl­cyclo­penta­dienyl ring and one nickela­fluorenyl ring. Both rings lie almost parallel to one another: the dihedral angle between the planes which include these rings is 4.4 (1)°. Slip parameter analysis indicates that the bonding mode of the central Ni atom to the nickelacyclic ring is between [eta]³ and [eta]⁵. Two-dimensional layers of mol­ecules are formed by C-H...[pi] inter­actions.

S1. Comment

Heterocyclic π-systems are useful in the synthesis of organometallic compounds because they can be used as multi-electron ligands. To examine the reactivity of the recently characterized nickelafluorenyllithium complex (Reference?), and to use it as a potential donor of the nickelafluorenyl group, we carried out the reaction of nickelafluorenyllithium with penthamethylcyclopentadienylnickelacetylacetonate in diethyl ether. This reaction resulted in the formation of the title dinickel complex, (I), in 58% yield. Complex (I) is an example of a heterometallocene in which the central Ni atom is bonded to two ligands, one cyclopentadienyl and one heterocyclopentadienyl. To our knowledge, this is the first example of the synthesis of a heterometallocene derivative possesing one metallacyclic ring in which a metallafluorenyllithium complex was used.

The molecular structure of complex (I) is shown in Fig. 1. Four C atoms of the fluorenyl moiety (C11, C12, C17 and C18) and atom Ni2 form a five-membered nickelacyclic ring that is not absolutely planar; the Ni atom deviates by 0.308 Å from the plane defined by the four C atoms. To define the bonding mode of the apical atom Ni1 to the nickelafluorenyl ring, we have determined the degree of slip-fold distortion, using previously reported parameters (Westcott et al., 1990). The slip parameter Δ_M–C, i.e. the difference between the average Ni1—C distances to atoms C12 and C18 and those to atoms C11 and C17, is ca 0.22 Å, which indicates that the bonding mode of atom Ni1 to the nickelacyclic ring is between η³ and η⁵.

H atoms from the Cp* group (H8 and H9) of one molecule form C—H···π interactions with the arene rings (C11–C16 and C17–C22) on the fluorenyl moiety of an adjacent molecule, resulting in the formation of one-dimensional chains of molecules along the crystallographic a direction (Fig. 2). These chains are organized into two-dimensional layers perpendicular to the crystallographic c axis by another C—H···π interaction formed by atoms H16 from the fluorenyl moieties to the Cp rings of the parallel chains (Table 2).

The structure of (I) may be compared with other compounds which contain a nickelafluorenyl ring. So far, only a few examples of such complexes have been reported, containing either one (Vicic & Jones, 1999; Schaub et al., 2006; Keen et al., 2007; Bennett et al., 2003; Schaub & Radius, 2005), two (Buchalski et al., 2006; Losi et al., 2007) or three (Schaub et al., 2006; Keen et al., 2007; Bennet et al., 1990) Ni atoms in the molecule (Fig. 3). The bond lengths between atoms Ni2 and C1 (as numbered in Fig. 3) in all compounds are between 1.90 and 2.00 Å. The C1—C2—C2—C1 [Symmetry codes missing?] torsion angles in all complexes are less than 8°, with the exception of two dinickel compounds in which these values are 25° (Keen et al., 2007) and 30° (Keen & Johnson 2006). In complex (I), the value of the corresponding torsion angle (C12—C11—C17—C18) is 0.2 (4)°.

The hinge angle, defined as the dihedral angle between the planes C1/C2/C2/C1 [Symmetry codes missing?] and C1/Ni2/C1 in most complexes, is less than 4°. The exceptions are complex (I) (12.5°) and its analogue (η⁵-pentamethylcyclopentadienyl){η³-[9-(η⁵-pentamethylcyclopentadienyl)nickelafluorenyl]}nickel (20.0 and 15.4°; Buchalski et al., 2006). In these compounds, the nickelafluorenyl rings are not flat: the Ni atoms deviate from the plane formed by the four C atoms. The reason for this may be the inductive effect of the methyl groups in the pentamethylcyclopentadienyl ring, which increases the electron density of both Ni atoms. In complex (I), in which only the apical Ni atom is bonded to the pentamethylcyclopentadienyl group, the value of the hinge angle is 5–7° less than in the compound in which both Ni atoms are bonded to pentamethylcyclopentedienyl groups.

S2. Experimental

All reactions were carried out in an atmosphere of dry argon or nitrogen using Schlenk tube techniques. Solvents were dried by conventional methods. NMR spectra were measured on a Varian Mercury 400BB instrument. Mass spectra were recorded on an AMD-604 spectrometer. EPR spectra were measured on Bruker ESP 300 spectrometer in X-band.

Nickelafluorenyllithium (0.762 g, 2.05 mmol; Buchalski et al., 2008) and diethyl ether (40 ml) were placed in a Schlenk flask and cooled to 243 K. A solution of penthamethylcyclopentadienylnickelacetylacetonate (0.612 g, 2.1 mmol; Smith & Andersen, 1996) in diethyl ether (30 ml) was added slowly. The reaction was stirred for 1 h at 243 K and then at room temperature overnight. After the reaction was completed, the solvent was removed and the residue was extracted with toluene (100 ml). The extract was filtered through alumina and then the solvent was evaporated. The residue was chromatographed on alumina (deactivated with 5% of water). One brown band was collected (hexane–toluene 4:1 v/v). The solvent was removed and a brown solid, compound (I), was obtained (0.557 g, 1.19 mmol, yield 58%). Crystals appropriate for X-ray measurements were grown from a hexane–THF [Ratio?] solution. Spectroscopic analysis: EIMS (70 eV, m/e, relative intensities, ⁵⁸Ni): 468 (96%, M⁺), 402 (100%, C₂₂H₂₂Ni₂⁺), 334 (29%, C₁₇H₁₄Ni₂⁺), 314 (21%, C₁₅H₁₈Ni₂⁺), 275 (31%, C₁₇H₁₃Ni⁺), 215 (27%, C₁₇H₁₁⁺), 152 (19%, C₁₂H₈⁺), 119 (7%, C₉H₁₁⁺); EI HR MS: observed 468.09058, calculated for C₂₇H₂₈⁵⁸Ni₂ 468.08980. Magnetic susceptibility was determined by NMR measurements at 293 K by the Evans method (Crawford & Swanson, 1971; Evans, 1959) from differences in the chemical shifts of methyl group H atoms of toluene used as solvent and as external standard. The magnetic moment of (I) in toluene solution at 293 K is 3.084 µ_B, which indicates that the compound is paramagnetic with two unpaired electrons per molecule. There were no signals in any EPR spectrum of (I) at room temperature or at 77 K, in the solid state or in benzene solution.

S3. Refinement

All H atoms were placed in geometric positions and treated as riding, with C—H = 0.95 Å, and with U_iso = 1.2U_eq of the attached aromatic C atom or 1.5U_eq of the attached methyl C atom.

Computing details

Data collection: COLLECT (Nonius, 1998); cell refinement: DENZO and SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO and SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Burnett & Johnson, 1996); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures

	Fig. 1. A view of the molecular structure of (I), showing the atom-numbering scheme. Displacement ellipsoids are drawn at 40% probability level. H atoms have been omitted for clarity.
	Fig. 2. The C—H···π interactions (dashed lines) of H atoms with the fluorenyl arene rings.
	Fig. 3. Atom-numbering scheme of nickelafluorenyl complexes with one, two and three Ni atoms in the molecule.

[(8a,9,9a-η)-9-(η⁵-Cyclopentadienyl)-9-nickelafluorenyl](η⁵- pentamethylcyclopentadienyl)nickel(II)

Crystal data

[Ni2(C5H5)(C10H15)(C12H8)]	Z = 2
Mr = 469.91	F(000) = 492
Triclinic, P1	Dx = 1.449 Mg m^−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 7.8022 (2) Å	Cell parameters from 3084 reflections
b = 9.3335 (3) Å	θ = 2.9–24.7°
c = 15.2091 (6) Å	µ = 1.76 mm^−1
α = 84.677 (2)°	T = 100 K
β = 84.953 (2)°	Prism, black
γ = 78.244 (2)°	0.26 × 0.20 × 0.14 mm
V = 1076.93 (6) Å^3

Data collection

Nonius KappaCCD diffractometer	3651 independent reflections
Radiation source: fine-focus sealed tube	2786 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.033
Detector resolution: 9.1 pixels mm^-1	θmax = 24.7°, θmin = 3.1°
ϕ and ω scans	h = −9→9
Absorption correction: empirical (using intensity measurements) [using spherical harmonic expansion of the absorption surface (Katayama, 1986; Blessing, 1995)]	k = −10→10
Tmin = 0.621, Tmax = 0.844	l = −17→17
10193 measured reflections

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) = 0.088	w = 1/[σ^2(Fo^2) + (0.0351P)^2 + 0.2154P] where P = (Fo^2 + 2Fc^2)/3
S = 1.04	(Δ/σ)max = 0.002
3651 reflections	Δρmax = 0.37 e Å^−3
271 parameters	Δρmin = −0.30 e Å^−3
0 restraints	Extinction correction: SHELXL97 (Sheldrick, 2008), Fc^*=kFc[1+0.001xFc^2λ^3/sin(2θ)]^-1/4
Primary atom site location: structure-invariant direct methods	Extinction coefficient: 0.0030 (12)

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 otropic) 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 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 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
Ni1	0.03239 (5)	0.20097 (4)	0.73869 (3)	0.03155 (16)
Ni2	0.24531 (5)	−0.01783 (4)	0.77107 (3)	0.03505 (16)
C1	−0.1571 (4)	0.3923 (3)	0.7000 (2)	0.0383 (8)
C2	−0.2050 (4)	0.3389 (4)	0.7869 (2)	0.0427 (9)
C3	−0.2349 (4)	0.1940 (4)	0.7843 (2)	0.0401 (8)
C4	−0.2058 (4)	0.1599 (4)	0.6943 (2)	0.0390 (8)
C5	−0.1586 (4)	0.2809 (4)	0.6429 (2)	0.0394 (8)
C6	−0.1137 (6)	0.5409 (4)	0.6732 (3)	0.0694 (12)
H6A	−0.2063	0.5999	0.6405	0.104*
H6B	−0.0056	0.5296	0.6368	0.104*
H6C	−0.1017	0.5881	0.7252	0.104*
C7	−0.2239 (6)	0.4224 (5)	0.8689 (3)	0.0691 (13)
H7A	−0.2129	0.3544	0.9204	0.104*
H7B	−0.3369	0.4866	0.8726	0.104*
H7C	−0.1337	0.4794	0.8658	0.104*
C8	−0.2916 (6)	0.0971 (5)	0.8614 (3)	0.0638 (12)
H8A	−0.2469	0.1189	0.9144	0.12 (2)*
H8C	−0.2468	−0.0039	0.8507	0.15 (3)*
H8B	−0.4175	0.1144	0.8683	0.15 (2)*
C9	−0.2307 (5)	0.0200 (4)	0.6591 (3)	0.0676 (13)
H9A	−0.3425	0.0366	0.6341	0.101*
H9B	−0.2263	−0.0558	0.7065	0.101*
H9C	−0.1391	−0.0096	0.6142	0.101*
C10	−0.1209 (5)	0.2918 (5)	0.5439 (2)	0.0653 (12)
H10A	−0.0287	0.3458	0.5287	0.098*
H10B	−0.2249	0.3414	0.5162	0.098*
H10C	−0.0850	0.1950	0.5237	0.098*
C11	0.2814 (4)	0.2718 (3)	0.7893 (2)	0.0324 (7)
C12	0.2255 (4)	0.1498 (3)	0.8376 (2)	0.0333 (7)
C13	0.1871 (5)	0.1585 (4)	0.9291 (2)	0.0455 (9)
H13	0.1469	0.0819	0.9627	0.055*
C14	0.2080 (5)	0.2788 (4)	0.9699 (2)	0.0547 (10)
H14	0.1846	0.2815	1.0308	0.066*
C15	0.2632 (5)	0.3956 (4)	0.9214 (2)	0.0556 (11)
H15	0.2758	0.4763	0.9501	0.067*
C16	0.2997 (5)	0.3943 (4)	0.8316 (2)	0.0455 (9)
H16	0.3361	0.4736	0.7993	0.055*
C17	0.3141 (4)	0.2529 (3)	0.6941 (2)	0.0326 (7)
C18	0.2816 (4)	0.1162 (3)	0.6715 (2)	0.0324 (7)
C19	0.3046 (4)	0.0890 (4)	0.5811 (2)	0.0397 (8)
H19	0.2826	0.0019	0.5637	0.048*
C20	0.3584 (5)	0.1880 (4)	0.5188 (2)	0.0458 (9)
H20	0.3735	0.1668	0.4597	0.055*
C21	0.3911 (5)	0.3196 (4)	0.5416 (2)	0.0479 (9)
H21	0.4277	0.3859	0.4981	0.057*
C22	0.3693 (5)	0.3521 (4)	0.6290 (2)	0.0423 (9)
H22	0.3915	0.4403	0.6445	0.051*
C23	0.1249 (6)	−0.2075 (4)	0.7963 (4)	0.0712 (13)
H23	0.0053	−0.2075	0.7987	0.085*
C24	0.2147 (8)	−0.1948 (4)	0.8641 (3)	0.0732 (14)
H24	0.1665	−0.1806	0.9215	0.088*
C25	0.3876 (8)	−0.2056 (5)	0.8376 (5)	0.093 (2)
H25	0.4772	−0.2016	0.8732	0.112*
C26	0.4052 (8)	−0.2236 (5)	0.7481 (6)	0.103 (2)
H26	0.5086	−0.2354	0.7117	0.124*
C27	0.2368 (10)	−0.2203 (4)	0.7230 (3)	0.0832 (18)
H27	0.2066	−0.2260	0.6658	0.100*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Ni1	0.0297 (3)	0.0302 (3)	0.0342 (3)	−0.00323 (19)	−0.00392 (19)	−0.00382 (18)
Ni2	0.0381 (3)	0.0240 (2)	0.0426 (3)	−0.00562 (19)	−0.0039 (2)	−0.00027 (19)
C1	0.0303 (19)	0.0334 (19)	0.049 (2)	−0.0013 (15)	−0.0073 (16)	0.0030 (16)
C2	0.034 (2)	0.047 (2)	0.043 (2)	0.0055 (17)	−0.0075 (16)	−0.0118 (17)
C3	0.0310 (19)	0.041 (2)	0.047 (2)	−0.0049 (16)	−0.0055 (16)	0.0003 (16)
C4	0.0287 (19)	0.041 (2)	0.049 (2)	−0.0064 (16)	−0.0102 (16)	−0.0053 (17)
C5	0.0293 (19)	0.053 (2)	0.0326 (18)	0.0004 (17)	−0.0084 (15)	0.0011 (16)
C6	0.064 (3)	0.043 (2)	0.097 (3)	−0.004 (2)	−0.015 (3)	0.013 (2)
C7	0.064 (3)	0.077 (3)	0.063 (3)	0.010 (2)	−0.008 (2)	−0.037 (2)
C8	0.050 (3)	0.078 (3)	0.058 (3)	−0.014 (2)	0.001 (2)	0.019 (2)
C9	0.058 (3)	0.060 (3)	0.093 (3)	−0.013 (2)	−0.022 (2)	−0.027 (2)
C10	0.051 (3)	0.095 (3)	0.044 (2)	−0.002 (2)	−0.009 (2)	0.001 (2)
C11	0.0303 (18)	0.0289 (17)	0.0377 (18)	−0.0021 (15)	−0.0099 (15)	−0.0022 (14)
C12	0.0358 (19)	0.0307 (17)	0.0348 (18)	−0.0099 (15)	−0.0089 (15)	0.0037 (14)
C13	0.053 (2)	0.048 (2)	0.0358 (19)	−0.0129 (19)	−0.0060 (17)	0.0023 (16)
C14	0.071 (3)	0.059 (2)	0.035 (2)	−0.011 (2)	−0.0047 (19)	−0.0101 (18)
C15	0.079 (3)	0.045 (2)	0.048 (2)	−0.018 (2)	−0.008 (2)	−0.0151 (19)
C16	0.056 (2)	0.0327 (19)	0.051 (2)	−0.0126 (18)	−0.0077 (19)	−0.0079 (16)
C17	0.0304 (19)	0.0296 (17)	0.0370 (18)	−0.0035 (15)	−0.0042 (15)	−0.0026 (14)
C18	0.0279 (18)	0.0275 (17)	0.0411 (19)	−0.0043 (14)	−0.0008 (15)	−0.0036 (14)
C19	0.040 (2)	0.0361 (19)	0.044 (2)	−0.0055 (16)	−0.0032 (17)	−0.0132 (16)
C20	0.047 (2)	0.052 (2)	0.0362 (19)	−0.0062 (19)	0.0017 (17)	−0.0048 (17)
C21	0.050 (2)	0.048 (2)	0.042 (2)	−0.0103 (19)	0.0048 (18)	0.0050 (17)
C22	0.046 (2)	0.0326 (19)	0.049 (2)	−0.0133 (17)	−0.0004 (18)	0.0020 (16)
C23	0.066 (3)	0.034 (2)	0.117 (4)	−0.019 (2)	−0.017 (3)	0.003 (3)
C24	0.122 (5)	0.036 (2)	0.062 (3)	−0.026 (3)	0.005 (3)	0.008 (2)
C25	0.092 (4)	0.033 (3)	0.163 (6)	−0.021 (3)	−0.080 (4)	0.038 (3)
C26	0.075 (4)	0.026 (2)	0.188 (7)	0.002 (2)	0.071 (4)	−0.002 (3)
C27	0.169 (6)	0.026 (2)	0.057 (3)	−0.022 (3)	−0.011 (4)	−0.0055 (19)

Geometric parameters (Å, º)

Ni1—C2	2.142 (3)	C9—H9B	0.9600
Ni1—C1	2.146 (3)	C9—H9C	0.9600
Ni1—C4	2.148 (3)	C10—H10A	0.9600
Ni1—C18	2.150 (3)	C10—H10B	0.9600
Ni1—C3	2.151 (3)	C10—H10C	0.9600
Ni1—C5	2.151 (3)	C11—C16	1.401 (4)
Ni1—C12	2.176 (3)	C11—C12	1.421 (4)
Ni1—C17	2.374 (3)	C11—C17	1.468 (4)
Ni1—C11	2.384 (3)	C12—C13	1.404 (4)
Ni1—Ni2	2.3974 (6)	C13—C14	1.376 (5)
Ni2—C18	1.911 (3)	C13—H13	0.9300
Ni2—C12	1.914 (3)	C14—C15	1.379 (5)
Ni2—C25	2.098 (4)	C14—H14	0.9300
Ni2—C27	2.104 (4)	C15—C16	1.371 (5)
Ni2—C26	2.107 (4)	C15—H15	0.9300
Ni2—C24	2.111 (4)	C16—H16	0.9300
Ni2—C23	2.157 (4)	C17—C22	1.393 (4)
C1—C2	1.414 (5)	C17—C18	1.428 (4)
C1—C5	1.418 (4)	C18—C19	1.412 (4)
C1—C6	1.505 (5)	C19—C20	1.361 (5)
C2—C3	1.422 (5)	C19—H19	0.9300
C2—C7	1.513 (4)	C20—C21	1.385 (5)
C3—C4	1.423 (4)	C20—H20	0.9300
C3—C8	1.505 (5)	C21—C22	1.379 (4)
C4—C5	1.406 (5)	C21—H21	0.9300
C4—C9	1.510 (4)	C22—H22	0.9300
C5—C10	1.507 (5)	C23—C24	1.323 (6)
C6—H6A	0.9600	C23—C27	1.354 (6)
C6—H6B	0.9600	C23—H23	0.9300
C6—H6C	0.9600	C24—C25	1.360 (7)
C7—H7A	0.9600	C24—H24	0.9300
C7—H7B	0.9600	C25—C26	1.378 (8)
C7—H7C	0.9600	C25—H25	0.9300
C8—H8A	0.9600	C26—C27	1.394 (8)
C8—H8C	0.9600	C26—H26	0.9300
C8—H8B	0.9600	C27—H27	0.9300
C9—H9A	0.9600
C2—Ni1—C1	38.52 (13)	C1—C6—H6C	109.5
C2—Ni1—C4	64.31 (12)	H6A—C6—H6C	109.5
C1—Ni1—C4	64.40 (12)	H6B—C6—H6C	109.5
C2—Ni1—C18	164.74 (13)	C2—C7—H7A	109.5
C1—Ni1—C18	127.91 (13)	C2—C7—H7B	109.5
C4—Ni1—C18	120.37 (12)	H7A—C7—H7B	109.5
C2—Ni1—C3	38.69 (12)	C2—C7—H7C	109.5
C1—Ni1—C3	64.93 (13)	H7A—C7—H7C	109.5
C4—Ni1—C3	38.65 (12)	H7B—C7—H7C	109.5
C18—Ni1—C3	153.54 (11)	C3—C8—H8A	109.5
C2—Ni1—C5	64.29 (13)	C3—C8—H8C	109.5
C1—Ni1—C5	38.54 (12)	H8A—C8—H8C	109.5
C4—Ni1—C5	38.19 (13)	C3—C8—H8B	109.5
C18—Ni1—C5	109.48 (12)	H8A—C8—H8B	109.5
C3—Ni1—C5	64.61 (13)	H8C—C8—H8B	109.5
C2—Ni1—C12	111.77 (12)	C4—C9—H9A	109.5
C1—Ni1—C12	134.49 (11)	C4—C9—H9B	109.5
C4—Ni1—C12	147.18 (12)	H9A—C9—H9B	109.5
C18—Ni1—C12	72.6 (1)	C4—C9—H9C	109.5
C3—Ni1—C12	116.76 (12)	H9A—C9—H9C	109.5
C5—Ni1—C12	172.58 (12)	H9B—C9—H9C	109.5
C2—Ni1—C17	131.15 (12)	C5—C10—H10A	109.5
C1—Ni1—C17	107.06 (12)	C5—C10—H10B	109.5
C4—Ni1—C17	145.30 (12)	H10A—C10—H10B	109.5
C18—Ni1—C17	36.37 (10)	C5—C10—H10C	109.5
C3—Ni1—C17	169.83 (11)	H10A—C10—H10C	109.5
C5—Ni1—C17	113.58 (12)	H10B—C10—H10C	109.5
C12—Ni1—C17	63.66 (11)	C16—C11—C12	121.2 (3)
C2—Ni1—C11	110.49 (11)	C16—C11—C17	126.1 (3)
C1—Ni1—C11	109.94 (11)	C12—C11—C17	112.7 (2)
C4—Ni1—C11	174.15 (11)	C16—C11—Ni1	132.2 (2)
C18—Ni1—C11	63.90 (11)	C12—C11—Ni1	64.02 (16)
C3—Ni1—C11	138.69 (11)	C17—C11—Ni1	71.66 (16)
C5—Ni1—C11	138.04 (12)	C13—C12—C11	117.1 (3)
C12—Ni1—C11	35.94 (11)	C13—C12—Ni2	127.8 (2)
C17—Ni1—C11	35.95 (10)	C11—C12—Ni2	114.4 (2)
C2—Ni1—Ni2	144.71 (10)	C13—C12—Ni1	125.0 (2)
C1—Ni1—Ni2	175.83 (9)	C11—C12—Ni1	80.03 (19)
C4—Ni1—Ni2	113.60 (9)	Ni2—C12—Ni1	71.44 (10)
C18—Ni1—Ni2	49.34 (9)	C14—C13—C12	120.9 (3)
C3—Ni1—Ni2	116.10 (9)	C14—C13—H13	119.5
C5—Ni1—Ni2	137.65 (9)	C12—C13—H13	119.5
C12—Ni1—Ni2	49.19 (8)	C13—C14—C15	120.8 (3)
C17—Ni1—Ni2	72.38 (8)	C13—C14—H14	119.6
C11—Ni1—Ni2	72.14 (7)	C15—C14—H14	119.6
C18—Ni2—C12	84.1 (1)	C16—C15—C14	120.9 (3)
C18—Ni2—C25	138.1 (2)	C16—C15—H15	119.6
C12—Ni2—C25	110.6 (2)	C14—C15—H15	119.6
C18—Ni2—C27	107.81 (16)	C15—C16—C11	119.1 (3)
C12—Ni2—C27	167.24 (18)	C15—C16—H16	120.4
C25—Ni2—C27	63.7 (2)	C11—C16—H16	120.4
C18—Ni2—C26	108.2 (2)	C22—C17—C18	120.7 (3)
C12—Ni2—C26	142.7 (3)	C22—C17—C11	126.9 (3)
C25—Ni2—C26	38.3 (2)	C18—C17—C11	112.5 (3)
C27—Ni2—C26	38.7 (2)	C22—C17—Ni1	131.8 (2)
C18—Ni2—C24	169.60 (14)	C18—C17—Ni1	63.24 (16)
C12—Ni2—C24	106.24 (15)	C11—C17—Ni1	72.39 (17)
C25—Ni2—C24	37.7 (2)	C19—C18—C17	116.9 (3)
C27—Ni2—C24	61.94 (17)	C19—C18—Ni2	128.1 (2)
C26—Ni2—C24	63.0 (2)	C17—C18—Ni2	114.3 (2)
C18—Ni2—C23	136.20 (18)	C19—C18—Ni1	124.0 (2)
C12—Ni2—C23	130.44 (18)	C17—C18—Ni1	80.39 (18)
C25—Ni2—C23	62.24 (18)	Ni2—C18—Ni1	72.08 (10)
C27—Ni2—C23	37.02 (17)	C20—C19—C18	121.2 (3)
C26—Ni2—C23	62.91 (19)	C20—C19—H19	119.4
C24—Ni2—C23	36.09 (17)	C18—C19—H19	119.4
C18—Ni2—Ni1	58.58 (9)	C19—C20—C21	121.4 (3)
C12—Ni2—Ni1	59.37 (10)	C19—C20—H20	119.3
C25—Ni2—Ni1	162.2 (2)	C21—C20—H20	119.3
C27—Ni2—Ni1	122.62 (18)	C22—C21—C20	119.8 (3)
C26—Ni2—Ni1	156.6 (3)	C22—C21—H21	120.1
C24—Ni2—Ni1	127.30 (16)	C20—C21—H21	120.1
C23—Ni2—Ni1	111.51 (13)	C21—C22—C17	120.1 (3)
C2—C1—C5	107.5 (3)	C21—C22—H22	120.0
C2—C1—C6	126.1 (3)	C17—C22—H22	120.0
C5—C1—C6	126.3 (3)	C24—C23—C27	108.3 (5)
C2—C1—Ni1	70.6 (2)	C24—C23—Ni2	70.1 (2)
C5—C1—Ni1	70.94 (19)	C27—C23—Ni2	69.4 (2)
C6—C1—Ni1	124.2 (3)	C24—C23—H23	125.9
C1—C2—C3	108.8 (3)	C27—C23—H23	125.9
C1—C2—C7	125.7 (3)	Ni2—C23—H23	126.3
C3—C2—C7	125.5 (3)	C23—C24—C25	110.1 (5)
C1—C2—Ni1	70.88 (19)	C23—C24—Ni2	73.9 (3)
C3—C2—Ni1	70.99 (19)	C25—C24—Ni2	70.7 (3)
C7—C2—Ni1	124.7 (3)	C23—C24—H24	124.9
C2—C3—C4	106.8 (3)	C25—C24—H24	124.9
C2—C3—C8	126.7 (3)	Ni2—C24—H24	122.2
C4—C3—C8	126.5 (3)	C24—C25—C26	107.2 (5)
C2—C3—Ni1	70.31 (19)	C24—C25—Ni2	71.6 (3)
C4—C3—Ni1	70.57 (18)	C26—C25—Ni2	71.2 (3)
C8—C3—Ni1	125.5 (3)	C24—C25—H25	126.4
C5—C4—C3	108.7 (3)	C26—C25—H25	126.4
C5—C4—C9	125.6 (3)	Ni2—C25—H25	122.5
C3—C4—C9	125.6 (3)	C25—C26—C27	106.1 (5)
C5—C4—Ni1	71.03 (18)	C25—C26—Ni2	70.5 (3)
C3—C4—Ni1	70.78 (18)	C27—C26—Ni2	70.6 (3)
C9—C4—Ni1	126.6 (3)	C25—C26—H26	126.9
C4—C5—C1	108.2 (3)	C27—C26—H26	126.9
C4—C5—C10	125.9 (3)	Ni2—C26—H26	123.6
C1—C5—C10	125.9 (3)	C23—C27—C26	108.1 (5)
C4—C5—Ni1	70.78 (19)	C23—C27—Ni2	73.6 (2)
C1—C5—Ni1	70.52 (18)	C26—C27—Ni2	70.8 (2)
C10—C5—Ni1	125.6 (2)	C23—C27—H27	125.9
C1—C6—H6A	109.5	C26—C27—H27	125.9
C1—C6—H6B	109.5	Ni2—C27—H27	121.4
H6A—C6—H6B	109.5
C2—Ni1—Ni2—C18	−171.02 (18)	Ni2—Ni1—C11—C12	−43.51 (17)
C1—Ni1—Ni2—C18	50.1 (12)	C2—Ni1—C11—C17	−132.94 (19)
C4—Ni1—Ni2—C18	110.61 (14)	C1—Ni1—C11—C17	−91.78 (19)
C3—Ni1—Ni2—C18	153.30 (14)	C4—Ni1—C11—C17	−106.3 (11)
C5—Ni1—Ni2—C18	73.17 (17)	C18—Ni1—C11—C17	31.59 (17)
C12—Ni1—Ni2—C18	−102.84 (14)	C3—Ni1—C11—C17	−166.12 (19)
C17—Ni1—Ni2—C18	−32.77 (12)	C5—Ni1—C11—C17	−59.0 (2)
C11—Ni1—Ni2—C18	−70.57 (13)	C12—Ni1—C11—C17	127.9 (3)
C2—Ni1—Ni2—C12	−68.18 (18)	Ni2—Ni1—C11—C17	84.40 (16)
C1—Ni1—Ni2—C12	152.9 (12)	C16—C11—C12—C13	0.9 (5)
C4—Ni1—Ni2—C12	−146.55 (15)	C17—C11—C12—C13	−178.7 (3)
C18—Ni1—Ni2—C12	102.84 (15)	Ni1—C11—C12—C13	−124.4 (3)
C3—Ni1—Ni2—C12	−103.86 (14)	C16—C11—C12—Ni2	−170.4 (3)
C5—Ni1—Ni2—C12	176.01 (17)	C17—C11—C12—Ni2	10.0 (4)
C17—Ni1—Ni2—C12	70.07 (13)	Ni1—C11—C12—Ni2	64.26 (16)
C11—Ni1—Ni2—C12	32.27 (13)	C16—C11—C12—Ni1	125.3 (3)
C2—Ni1—Ni2—C25	−8.7 (4)	C17—C11—C12—Ni1	−54.3 (2)
C1—Ni1—Ni2—C25	−147.6 (12)	C18—Ni2—C12—C13	177.1 (3)
C4—Ni1—Ni2—C25	−87.1 (4)	C25—Ni2—C12—C13	−43.3 (4)
C18—Ni1—Ni2—C25	162.3 (4)	C27—Ni2—C12—C13	17.6 (11)
C3—Ni1—Ni2—C25	−44.4 (4)	C26—Ni2—C12—C13	−70.4 (4)
C5—Ni1—Ni2—C25	−124.5 (4)	C24—Ni2—C12—C13	−3.8 (4)
C12—Ni1—Ni2—C25	59.5 (4)	C23—Ni2—C12—C13	27.2 (4)
C17—Ni1—Ni2—C25	129.6 (4)	Ni1—Ni2—C12—C13	120.4 (3)
C11—Ni1—Ni2—C25	91.7 (4)	C18—Ni2—C12—C11	−12.6 (2)
C2—Ni1—Ni2—C27	97.0 (2)	C25—Ni2—C12—C11	126.9 (3)
C1—Ni1—Ni2—C27	−41.9 (12)	C27—Ni2—C12—C11	−172.2 (9)
C4—Ni1—Ni2—C27	18.6 (2)	C26—Ni2—C12—C11	99.9 (3)
C18—Ni1—Ni2—C27	−92.0 (2)	C24—Ni2—C12—C11	166.5 (3)
C3—Ni1—Ni2—C27	61.3 (2)	C23—Ni2—C12—C11	−162.5 (2)
C5—Ni1—Ni2—C27	−18.8 (2)	Ni1—Ni2—C12—C11	−69.4 (2)
C12—Ni1—Ni2—C27	165.2 (2)	C18—Ni2—C12—Ni1	56.76 (11)
C17—Ni1—Ni2—C27	−124.7 (2)	C25—Ni2—C12—Ni1	−163.7 (2)
C11—Ni1—Ni2—C27	−162.6 (2)	C27—Ni2—C12—Ni1	−102.8 (9)
C2—Ni1—Ni2—C26	128.3 (4)	C26—Ni2—C12—Ni1	169.3 (2)
C1—Ni1—Ni2—C26	−10.6 (12)	C24—Ni2—C12—Ni1	−124.12 (18)
C4—Ni1—Ni2—C26	49.9 (4)	C23—Ni2—C12—Ni1	−93.2 (2)
C18—Ni1—Ni2—C26	−60.7 (4)	C2—Ni1—C12—C13	21.0 (3)
C3—Ni1—Ni2—C26	92.6 (4)	C1—Ni1—C12—C13	59.0 (3)
C5—Ni1—Ni2—C26	12.5 (4)	C4—Ni1—C12—C13	−55.0 (4)
C12—Ni1—Ni2—C26	−163.5 (4)	C18—Ni1—C12—C13	−174.5 (3)
C17—Ni1—Ni2—C26	−93.5 (3)	C3—Ni1—C12—C13	−21.3 (3)
C11—Ni1—Ni2—C26	−131.3 (3)	C5—Ni1—C12—C13	77.6 (10)
C2—Ni1—Ni2—C24	19.4 (2)	C17—Ni1—C12—C13	147.4 (3)
C1—Ni1—Ni2—C24	−119.5 (12)	C11—Ni1—C12—C13	116.3 (3)
C4—Ni1—Ni2—C24	−59.0 (2)	Ni2—Ni1—C12—C13	−123.7 (3)
C18—Ni1—Ni2—C24	−169.6 (2)	C2—Ni1—C12—C11	−95.2 (2)
C3—Ni1—Ni2—C24	−16.3 (2)	C1—Ni1—C12—C11	−57.3 (3)
C5—Ni1—Ni2—C24	−96.4 (2)	C4—Ni1—C12—C11	−171.2 (2)
C12—Ni1—Ni2—C24	87.6 (2)	C18—Ni1—C12—C11	69.24 (18)
C17—Ni1—Ni2—C24	157.64 (19)	C3—Ni1—C12—C11	−137.52 (18)
C11—Ni1—Ni2—C24	119.83 (19)	C5—Ni1—C12—C11	−38.7 (10)
C2—Ni1—Ni2—C23	57.0 (2)	C17—Ni1—C12—C11	31.12 (16)
C1—Ni1—Ni2—C23	−81.9 (12)	Ni2—Ni1—C12—C11	120.0 (2)
C4—Ni1—Ni2—C23	−21.3 (2)	C2—Ni1—C12—Ni2	144.72 (12)
C18—Ni1—Ni2—C23	−131.93 (19)	C1—Ni1—C12—Ni2	−177.34 (13)
C3—Ni1—Ni2—C23	21.4 (2)	C4—Ni1—C12—Ni2	68.7 (2)
C5—Ni1—Ni2—C23	−58.8 (2)	C18—Ni1—C12—Ni2	−50.80 (10)
C12—Ni1—Ni2—C23	125.2 (2)	C3—Ni1—C12—Ni2	102.44 (12)
C17—Ni1—Ni2—C23	−164.70 (18)	C5—Ni1—C12—Ni2	−158.7 (9)
C11—Ni1—Ni2—C23	157.49 (18)	C17—Ni1—C12—Ni2	−88.92 (11)
C4—Ni1—C1—C2	80.2 (2)	C11—Ni1—C12—Ni2	−120.0 (2)
C18—Ni1—C1—C2	−170.07 (17)	C11—C12—C13—C14	−1.8 (5)
C3—Ni1—C1—C2	37.26 (18)	Ni2—C12—C13—C14	168.2 (3)
C5—Ni1—C1—C2	117.3 (3)	Ni1—C12—C13—C14	−98.8 (4)
C12—Ni1—C1—C2	−66.5 (2)	C12—C13—C14—C15	1.6 (6)
C17—Ni1—C1—C2	−136.03 (18)	C13—C14—C15—C16	−0.4 (7)
C11—Ni1—C1—C2	−98.17 (19)	C14—C15—C16—C11	−0.4 (6)
Ni2—Ni1—C1—C2	142.4 (11)	C12—C11—C16—C15	0.2 (5)
C2—Ni1—C1—C5	−117.3 (3)	C17—C11—C16—C15	179.7 (3)
C4—Ni1—C1—C5	−37.12 (19)	Ni1—C11—C16—C15	82.0 (4)
C18—Ni1—C1—C5	72.6 (2)	C16—C11—C17—C22	0.2 (6)
C3—Ni1—C1—C5	−80.1 (2)	C12—C11—C17—C22	179.8 (3)
C12—Ni1—C1—C5	176.20 (18)	Ni1—C11—C17—C22	129.5 (3)
C17—Ni1—C1—C5	106.64 (19)	C16—C11—C17—C18	−179.3 (3)
C11—Ni1—C1—C5	144.50 (18)	C12—C11—C17—C18	0.2 (4)
Ni2—Ni1—C1—C5	25.1 (13)	Ni1—C11—C17—C18	−50.0 (2)
C2—Ni1—C1—C6	121.1 (4)	C16—C11—C17—Ni1	−129.3 (3)
C4—Ni1—C1—C6	−158.7 (4)	C12—C11—C17—Ni1	50.3 (2)
C18—Ni1—C1—C6	−49.0 (4)	C2—Ni1—C17—C22	−58.5 (3)
C3—Ni1—C1—C6	158.4 (3)	C1—Ni1—C17—C22	−23.5 (3)
C5—Ni1—C1—C6	−121.6 (4)	C4—Ni1—C17—C22	46.0 (4)
C12—Ni1—C1—C6	54.6 (4)	C18—Ni1—C17—C22	108.4 (3)
C17—Ni1—C1—C6	−14.9 (3)	C3—Ni1—C17—C22	−60.3 (8)
C11—Ni1—C1—C6	23.0 (3)	C5—Ni1—C17—C22	17.2 (3)
Ni2—Ni1—C1—C6	−96.4 (12)	C12—Ni1—C17—C22	−155.2 (3)
C5—C1—C2—C3	0.5 (4)	C11—Ni1—C17—C22	−124.1 (4)
C6—C1—C2—C3	−179.9 (3)	Ni2—Ni1—C17—C22	152.2 (3)
Ni1—C1—C2—C3	−61.2 (2)	C2—Ni1—C17—C18	−166.90 (19)
C5—C1—C2—C7	−178.7 (3)	C1—Ni1—C17—C18	−131.8 (2)
C6—C1—C2—C7	0.9 (6)	C4—Ni1—C17—C18	−62.4 (3)
Ni1—C1—C2—C7	119.6 (4)	C3—Ni1—C17—C18	−168.7 (6)
C5—C1—C2—Ni1	61.7 (2)	C5—Ni1—C17—C18	−91.2 (2)
C6—C1—C2—Ni1	−118.7 (4)	C12—Ni1—C17—C18	96.4 (2)
C4—Ni1—C2—C1	−80.5 (2)	C11—Ni1—C17—C18	127.5 (3)
C18—Ni1—C2—C1	31.1 (5)	Ni2—Ni1—C17—C18	43.82 (17)
C3—Ni1—C2—C1	−118.7 (3)	C2—Ni1—C17—C11	65.6 (2)
C5—Ni1—C2—C1	−37.90 (18)	C1—Ni1—C17—C11	100.64 (18)
C12—Ni1—C2—C1	135.23 (18)	C4—Ni1—C17—C11	170.1 (2)
C17—Ni1—C2—C1	61.8 (2)	C18—Ni1—C17—C11	−127.5 (3)
C11—Ni1—C2—C1	96.62 (19)	C3—Ni1—C17—C11	63.8 (7)
Ni2—Ni1—C2—C1	−175.60 (13)	C5—Ni1—C17—C11	141.29 (18)
C1—Ni1—C2—C3	118.7 (3)	C12—Ni1—C17—C11	−31.12 (17)
C4—Ni1—C2—C3	38.2 (2)	Ni2—Ni1—C17—C11	−83.69 (16)
C18—Ni1—C2—C3	149.8 (4)	C22—C17—C18—C19	−1.3 (5)
C5—Ni1—C2—C3	80.8 (2)	C11—C17—C18—C19	178.3 (3)
C12—Ni1—C2—C3	−106.1 (2)	Ni1—C17—C18—C19	123.4 (3)
C17—Ni1—C2—C3	−179.49 (18)	C22—C17—C18—Ni2	170.1 (3)
C11—Ni1—C2—C3	−144.69 (19)	C11—C17—C18—Ni2	−10.3 (3)
Ni2—Ni1—C2—C3	−56.9 (3)	Ni1—C17—C18—Ni2	−65.24 (16)
C1—Ni1—C2—C7	−120.8 (4)	C22—C17—C18—Ni1	−124.7 (3)
C4—Ni1—C2—C7	158.8 (4)	C11—C17—C18—Ni1	54.9 (2)
C18—Ni1—C2—C7	−89.7 (5)	C12—Ni2—C18—C19	−177.1 (3)
C3—Ni1—C2—C7	120.5 (4)	C25—Ni2—C18—C19	68.4 (4)
C5—Ni1—C2—C7	−158.7 (4)	C27—Ni2—C18—C19	−1.8 (4)
C12—Ni1—C2—C7	14.5 (4)	C26—Ni2—C18—C19	39.0 (4)
C17—Ni1—C2—C7	−58.9 (4)	C24—Ni2—C18—C19	7.6 (12)
C11—Ni1—C2—C7	−24.2 (4)	C23—Ni2—C18—C19	−30.5 (4)
Ni2—Ni1—C2—C7	63.6 (4)	Ni1—Ni2—C18—C19	−119.6 (3)
C1—C2—C3—C4	−0.4 (4)	C12—Ni2—C18—C17	12.7 (2)
C7—C2—C3—C4	178.8 (3)	C25—Ni2—C18—C17	−101.8 (3)
Ni1—C2—C3—C4	−61.5 (2)	C27—Ni2—C18—C17	−171.9 (3)
C1—C2—C3—C8	−178.8 (3)	C26—Ni2—C18—C17	−131.2 (3)
C7—C2—C3—C8	0.5 (6)	C24—Ni2—C18—C17	−162.5 (10)
Ni1—C2—C3—C8	120.1 (4)	C23—Ni2—C18—C17	159.3 (3)
C1—C2—C3—Ni1	61.1 (2)	Ni1—Ni2—C18—C17	70.2 (2)
C7—C2—C3—Ni1	−119.6 (4)	C12—Ni2—C18—Ni1	−57.50 (11)
C1—Ni1—C3—C2	−37.1 (2)	C25—Ni2—C18—Ni1	−172.0 (2)
C4—Ni1—C3—C2	−116.8 (3)	C27—Ni2—C18—Ni1	117.9 (2)
C18—Ni1—C3—C2	−162.7 (3)	C26—Ni2—C18—Ni1	158.6 (3)
C5—Ni1—C3—C2	−79.9 (2)	C24—Ni2—C18—Ni1	127.2 (11)
C12—Ni1—C3—C2	92.0 (2)	C23—Ni2—C18—Ni1	89.1 (2)
C17—Ni1—C3—C2	2.2 (8)	C2—Ni1—C18—C19	−75.7 (5)
C11—Ni1—C3—C2	55.1 (3)	C1—Ni1—C18—C19	−51.6 (3)
Ni2—Ni1—C3—C2	147.38 (18)	C4—Ni1—C18—C19	28.1 (3)
C2—Ni1—C3—C4	116.8 (3)	C3—Ni1—C18—C19	59.5 (4)
C1—Ni1—C3—C4	79.7 (2)	C5—Ni1—C18—C19	−12.5 (3)
C18—Ni1—C3—C4	−45.9 (4)	C12—Ni1—C18—C19	175.0 (3)
C5—Ni1—C3—C4	36.91 (19)	C17—Ni1—C18—C19	−116.1 (3)
C12—Ni1—C3—C4	−151.20 (19)	C11—Ni1—C18—C19	−147.3 (3)
C17—Ni1—C3—C4	119.0 (6)	Ni2—Ni1—C18—C19	124.4 (3)
C11—Ni1—C3—C4	171.90 (18)	C2—Ni1—C18—C17	40.4 (5)
Ni2—Ni1—C3—C4	−95.81 (19)	C1—Ni1—C18—C17	64.5 (2)
C2—Ni1—C3—C8	−121.7 (4)	C4—Ni1—C18—C17	144.23 (19)
C1—Ni1—C3—C8	−158.8 (3)	C3—Ni1—C18—C17	175.5 (3)
C4—Ni1—C3—C8	121.5 (4)	C5—Ni1—C18—C17	103.6 (2)
C18—Ni1—C3—C8	75.6 (4)	C12—Ni1—C18—C17	−68.91 (19)
C5—Ni1—C3—C8	158.4 (4)	C11—Ni1—C18—C17	−31.23 (17)
C12—Ni1—C3—C8	−29.7 (3)	Ni2—Ni1—C18—C17	−119.6 (2)
C17—Ni1—C3—C8	−119.5 (7)	C2—Ni1—C18—Ni2	160.0 (4)
C11—Ni1—C3—C8	−66.6 (4)	C1—Ni1—C18—Ni2	−175.95 (11)
Ni2—Ni1—C3—C8	25.7 (3)	C4—Ni1—C18—Ni2	−96.22 (14)
C2—C3—C4—C5	0.2 (4)	C3—Ni1—C18—Ni2	−64.9 (3)
C8—C3—C4—C5	178.5 (3)	C5—Ni1—C18—Ni2	−136.85 (11)
Ni1—C3—C4—C5	−61.2 (2)	C12—Ni1—C18—Ni2	50.64 (10)
C2—C3—C4—C9	−176.9 (3)	C17—Ni1—C18—Ni2	119.6 (2)
C8—C3—C4—C9	1.5 (6)	C11—Ni1—C18—Ni2	88.32 (12)
Ni1—C3—C4—C9	121.8 (4)	C17—C18—C19—C20	1.2 (5)
C2—C3—C4—Ni1	61.4 (2)	Ni2—C18—C19—C20	−168.8 (3)
C8—C3—C4—Ni1	−120.3 (4)	Ni1—C18—C19—C20	97.9 (4)
C2—Ni1—C4—C5	80.4 (2)	C18—C19—C20—C21	−0.6 (6)
C1—Ni1—C4—C5	37.46 (19)	C19—C20—C21—C22	0.1 (6)
C18—Ni1—C4—C5	−83.1 (2)	C20—C21—C22—C17	−0.2 (6)
C3—Ni1—C4—C5	118.6 (3)	C18—C17—C22—C21	0.8 (5)
C12—Ni1—C4—C5	171.2 (2)	C11—C17—C22—C21	−178.7 (3)
C17—Ni1—C4—C5	−45.6 (3)	Ni1—C17—C22—C21	−79.3 (4)
C11—Ni1—C4—C5	52.6 (12)	C18—Ni2—C23—C24	169.1 (3)
Ni2—Ni1—C4—C5	−138.52 (17)	C12—Ni2—C23—C24	−57.0 (4)
C2—Ni1—C4—C3	−38.3 (2)	C25—Ni2—C23—C24	37.3 (3)
C1—Ni1—C4—C3	−81.2 (2)	C27—Ni2—C23—C24	119.5 (5)
C18—Ni1—C4—C3	158.23 (19)	C26—Ni2—C23—C24	80.6 (4)
C5—Ni1—C4—C3	−118.6 (3)	Ni1—Ni2—C23—C24	−124.4 (3)
C12—Ni1—C4—C3	52.5 (3)	C18—Ni2—C23—C27	49.6 (4)
C17—Ni1—C4—C3	−164.3 (2)	C12—Ni2—C23—C27	−176.5 (3)
C11—Ni1—C4—C3	−66.0 (12)	C25—Ni2—C23—C27	−82.2 (4)
Ni2—Ni1—C4—C3	102.84 (18)	C26—Ni2—C23—C27	−38.9 (4)
C2—Ni1—C4—C9	−158.9 (4)	C24—Ni2—C23—C27	−119.5 (5)
C1—Ni1—C4—C9	158.2 (4)	Ni1—Ni2—C23—C27	116.1 (3)
C18—Ni1—C4—C9	37.6 (4)	C27—C23—C24—C25	−2.7 (5)
C3—Ni1—C4—C9	−120.7 (4)	Ni2—C23—C24—C25	−61.7 (3)
C5—Ni1—C4—C9	120.7 (4)	C27—C23—C24—Ni2	59.1 (3)
C12—Ni1—C4—C9	−68.1 (4)	C18—Ni2—C24—C23	−46.6 (13)
C17—Ni1—C4—C9	75.1 (4)	C12—Ni2—C24—C23	138.4 (3)
C11—Ni1—C4—C9	173.3 (10)	C25—Ni2—C24—C23	−118.8 (4)
Ni2—Ni1—C4—C9	−17.8 (4)	C27—Ni2—C24—C23	−36.4 (3)
C3—C4—C5—C1	0.2 (4)	C26—Ni2—C24—C23	−80.2 (4)
C9—C4—C5—C1	177.2 (3)	Ni1—Ni2—C24—C23	74.8 (3)
Ni1—C4—C5—C1	−60.9 (2)	C18—Ni2—C24—C25	72.2 (12)
C3—C4—C5—C10	−178.4 (3)	C12—Ni2—C24—C25	−102.9 (4)
C9—C4—C5—C10	−1.4 (6)	C27—Ni2—C24—C25	82.4 (4)
Ni1—C4—C5—C10	120.6 (4)	C26—Ni2—C24—C25	38.5 (3)
C3—C4—C5—Ni1	61.1 (2)	C23—Ni2—C24—C25	118.8 (4)
C9—C4—C5—Ni1	−121.9 (4)	Ni1—Ni2—C24—C25	−166.4 (3)
C2—C1—C5—C4	−0.4 (4)	C23—C24—C25—C26	1.0 (5)
C6—C1—C5—C4	180.0 (3)	Ni2—C24—C25—C26	−62.7 (3)
Ni1—C1—C5—C4	61.1 (2)	C23—C24—C25—Ni2	63.7 (3)
C2—C1—C5—C10	178.1 (3)	C18—Ni2—C25—C24	−165.1 (3)
C6—C1—C5—C10	−1.5 (6)	C12—Ni2—C25—C24	90.1 (3)
Ni1—C1—C5—C10	−120.4 (4)	C27—Ni2—C25—C24	−77.4 (3)
C2—C1—C5—Ni1	−61.5 (2)	C26—Ni2—C25—C24	−116.3 (4)
C6—C1—C5—Ni1	118.9 (4)	C23—Ni2—C25—C24	−35.7 (3)
C2—Ni1—C5—C4	−80.4 (2)	Ni1—Ni2—C25—C24	37.8 (6)
C1—Ni1—C5—C4	−118.3 (3)	C18—Ni2—C25—C26	−48.8 (4)
C18—Ni1—C5—C4	114.68 (19)	C12—Ni2—C25—C26	−153.6 (3)
C3—Ni1—C5—C4	−37.35 (18)	C27—Ni2—C25—C26	38.8 (3)
C12—Ni1—C5—C4	−139.8 (9)	C24—Ni2—C25—C26	116.3 (4)
C17—Ni1—C5—C4	153.64 (18)	C23—Ni2—C25—C26	80.6 (3)
C11—Ni1—C5—C4	−173.05 (18)	Ni1—Ni2—C25—C26	154.0 (4)
Ni2—Ni1—C5—C4	64.3 (2)	C24—C25—C26—C27	1.0 (5)
C2—Ni1—C5—C1	37.89 (19)	Ni2—C25—C26—C27	−62.0 (3)
C4—Ni1—C5—C1	118.3 (3)	C24—C25—C26—Ni2	63.0 (3)
C18—Ni1—C5—C1	−127.00 (19)	C18—Ni2—C26—C25	148.1 (3)
C3—Ni1—C5—C1	81.0 (2)	C12—Ni2—C26—C25	43.4 (5)
C12—Ni1—C5—C1	−21.5 (10)	C27—Ni2—C26—C25	−115.9 (4)
C17—Ni1—C5—C1	−88.0 (2)	C24—Ni2—C26—C25	−38.0 (3)
C11—Ni1—C5—C1	−54.7 (3)	C23—Ni2—C26—C25	−78.7 (3)
Ni2—Ni1—C5—C1	−177.37 (15)	Ni1—Ni2—C26—C25	−160.4 (3)
C2—Ni1—C5—C10	158.7 (4)	C18—Ni2—C26—C27	−96.0 (3)
C1—Ni1—C5—C10	120.8 (4)	C12—Ni2—C26—C27	159.3 (3)
C4—Ni1—C5—C10	−120.9 (4)	C25—Ni2—C26—C27	115.9 (4)
C18—Ni1—C5—C10	−6.2 (3)	C24—Ni2—C26—C27	78.0 (3)
C3—Ni1—C5—C10	−158.3 (4)	C23—Ni2—C26—C27	37.3 (3)
C12—Ni1—C5—C10	99.3 (9)	Ni1—Ni2—C26—C27	−44.4 (5)
C17—Ni1—C5—C10	32.7 (3)	C24—C23—C27—C26	3.3 (5)
C11—Ni1—C5—C10	66.0 (4)	Ni2—C23—C27—C26	62.7 (3)
Ni2—Ni1—C5—C10	−56.6 (4)	C24—C23—C27—Ni2	−59.5 (3)
C2—Ni1—C11—C16	−10.5 (4)	C25—C26—C27—C23	−2.6 (5)
C1—Ni1—C11—C16	30.7 (3)	Ni2—C26—C27—C23	−64.6 (3)
C4—Ni1—C11—C16	16.2 (13)	C25—C26—C27—Ni2	62.0 (3)
C18—Ni1—C11—C16	154.1 (4)	C18—Ni2—C27—C23	−146.4 (3)
C3—Ni1—C11—C16	−43.6 (4)	C12—Ni2—C27—C23	12.2 (12)
C5—Ni1—C11—C16	63.5 (4)	C25—Ni2—C27—C23	78.1 (3)
C12—Ni1—C11—C16	−109.6 (4)	C26—Ni2—C27—C23	116.5 (5)
C17—Ni1—C11—C16	122.5 (4)	C24—Ni2—C27—C23	35.5 (3)
Ni2—Ni1—C11—C16	−153.1 (3)	Ni1—Ni2—C27—C23	−82.8 (3)
C2—Ni1—C11—C12	99.2 (2)	C18—Ni2—C27—C26	97.1 (4)
C1—Ni1—C11—C12	140.31 (19)	C12—Ni2—C27—C26	−104.3 (11)
C4—Ni1—C11—C12	125.8 (11)	C25—Ni2—C27—C26	−38.4 (3)
C18—Ni1—C11—C12	−96.3 (2)	C24—Ni2—C27—C26	−81.0 (4)
C3—Ni1—C11—C12	66.0 (3)	C23—Ni2—C27—C26	−116.5 (5)
C5—Ni1—C11—C12	173.07 (19)	Ni1—Ni2—C27—C26	160.7 (3)
C17—Ni1—C11—C12	−127.9 (3)