#------------------------------------------------------------------------------
#$Date: 2016-03-25 15:17:09 +0200 (Fri, 25 Mar 2016) $
#$Revision: 179916 $
#$URL: svn://www.crystallography.net/cod/cif/7/02/11/7021199.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_7021199
loop_
_publ_author_name
'Clark, Wesley D.'
'Tyson, Ginger E.'
'Hollis, T. Keith'
'Valle, Henry U.'
'Valente, Edward J.'
'Oliver, Allen G.'
'Dukes, Matthew P.'
_publ_section_title
;
 Toward molecular rotors: tetra-N-heterocyclic carbene Ag(i)-halide
 cubane-type clusters.
;
_journal_issue                   20
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7338
_journal_page_last               7344
_journal_paper_doi               10.1039/c3dt32862g
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'C40 H44 Ag4 I4 N8, 2(C H2 Cl2)'
_chemical_formula_sum            'C42 H48 Ag4 Cl4 I4 N8'
_chemical_formula_weight         1745.76
_chemical_name_systematic
;
?
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           60
_space_group_name_Hall           '-P 2n 2ab'
_space_group_name_H-M_alt        'P b c n'
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2012
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   20.6181(12)
_cell_length_b                   12.8667(7)
_cell_length_c                   19.8917(11)
_cell_measurement_reflns_used    8707
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      23.27
_cell_measurement_theta_min      2.84
_cell_volume                     5277.0(5)
_computing_cell_refinement       'Bruker SAINT v8.18C'
_computing_data_collection       'Bruker APEX-II v2012'
_computing_data_reduction        'Bruker SAINT v8.18c'
_computing_structure_refinement  'SHELXL-2012 (Sheldrick, 2012)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'Bruker APEX-II'
_diffrn_measurement_method       'ω and φ-scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0668
_diffrn_reflns_av_unetI/netI     0.0575
_diffrn_reflns_Laue_measured_fraction_full 0.982
_diffrn_reflns_Laue_measured_fraction_max 0.974
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            31536
_diffrn_reflns_point_group_measured_fraction_full 0.982
_diffrn_reflns_point_group_measured_fraction_max 0.974
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.433
_diffrn_reflns_theta_min         1.866
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    4.043
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.5248
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Sheldrick, 2008'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.197
_exptl_crystal_description       block
_exptl_crystal_F_000             3296
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.738
_refine_diff_density_min         -1.057
_refine_diff_density_rms         0.184
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         5297
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0554
_refine_ls_R_factor_gt           0.0376
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
w=1/[σ²(Fo²)+(0.0305P)²+2.9797P]
where P=(Fo²+2Fc²)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0753
_refine_ls_wR_factor_ref         0.0835
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4069
_reflns_number_total             5297
_reflns_threshold_expression     'I > 2σ(I)'
_cod_data_source_file            c3dt32862g.txt
_cod_data_source_block           umcb15a
_cod_database_code               7021199
#BEGIN Tags that were not found in dictionaries:
_shelx_space_group_comment
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_shelx_estimated_absorpt_t_min   0.499
_shelx_estimated_absorpt_t_max   0.499
_shelxl_version_number           2012-9
#END Tags that were not found in dictionaries
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x+1/2, -y+1/2, z+1/2'
'-x, y, -z+1/2'
'x+1/2, -y+1/2, -z'
'-x, -y, -z'
'x-1/2, y-1/2, -z-1/2'
'x, -y, z-1/2'
'-x-1/2, y-1/2, z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
Ag1 Ag 0.44702(2) 0.84640(3) 0.18789(2) 0.02979(12) Uani 1 1 d . .
I1 I 0.58418(2) 0.88582(2) 0.17498(2) 0.02321(11) Uani 1 1 d . .
N1 N 0.40111(19) 0.8988(3) 0.03585(19) 0.0215(9) Uani 1 1 d . .
C1 C 0.4566(2) 0.8513(4) 0.0051(2) 0.0205(11) Uani 1 1 d . .
C1S C 0.2332(3) 0.8019(4) -0.1522(2) 0.0456(16) Uani 1 1 d . .
H1SA H 0.1876 0.8025 -0.1678 0.055 Uiso 1 1 calc R U
H1SB H 0.2578 0.7540 -0.1817 0.055 Uiso 1 1 calc R U
Cl1 Cl 0.26570(7) 0.92756(11) -0.15947(7) 0.0449(4) Uani 1 1 d . .
Ag2 Ag 0.54241(2) 0.66738(3) 0.17890(2) 0.02910(12) Uani 1 1 d . .
I2 I 0.40166(2) 0.61048(2) 0.19424(2) 0.02291(10) Uani 1 1 d . .
N2 N 0.33242(19) 0.9563(3) 0.10809(18) 0.0219(9) Uani 1 1 d . .
C2 C 0.4843(2) 0.8995(4) -0.0506(2) 0.0258(12) Uani 1 1 d . .
H2A H 0.4671 0.9629 -0.0673 0.031 Uiso 1 1 calc R U
Cl2 Cl 0.23592(8) 0.75589(13) -0.06960(7) 0.0650(5) Uani 1 1 d . .
N3 N 0.55954(18) 0.6164(3) 0.01977(19) 0.0224(9) Uani 1 1 d . .
C3 C 0.5371(3) 0.8538(4) -0.0812(2) 0.0297(13) Uani 1 1 d . .
H3A H 0.5563 0.8868 -0.1190 0.036 Uiso 1 1 calc R U
N4 N 0.59864(18) 0.4950(3) 0.08079(19) 0.0228(9) Uani 1 1 d . .
C4 C 0.5622(2) 0.7620(4) -0.0583(2) 0.0275(12) Uani 1 1 d . .
H4A H 0.5987 0.7315 -0.0798 0.033 Uiso 1 1 calc R U
C5 C 0.5336(2) 0.7139(3) -0.0029(2) 0.0213(11) Uani 1 1 d . .
C6 C 0.4800(2) 0.7574(3) 0.0289(2) 0.0191(11) Uani 1 1 d . .
H6A H 0.4600 0.7237 0.0660 0.023 Uiso 1 1 calc R U
C7 C 0.3531(2) 0.9507(4) 0.0004(2) 0.0277(12) Uani 1 1 d . .
H7A H 0.3513 0.9602 -0.0469 0.033 Uiso 1 1 calc R U
C8 C 0.3100(2) 0.9845(4) 0.0453(2) 0.0289(13) Uani 1 1 d . .
H8A H 0.2711 1.0213 0.0359 0.035 Uiso 1 1 calc R U
C9 C 0.3883(2) 0.9022(3) 0.1039(2) 0.0200(11) Uani 1 1 d . .
C10 C 0.5691(2) 0.5886(4) 0.0857(2) 0.0211(11) Uani 1 1 d . .
C11 C 0.5814(2) 0.5394(4) -0.0235(2) 0.0269(12) Uani 1 1 d . .
H11A H 0.5792 0.5405 -0.0712 0.032 Uiso 1 1 calc R U
C12 C 0.6059(2) 0.4642(4) 0.0140(3) 0.0321(13) Uani 1 1 d . .
H12A H 0.6248 0.4013 -0.0015 0.039 Uiso 1 1 calc R U
C13 C 0.6186(2) 0.4332(4) 0.1392(2) 0.0285(12) Uani 1 1 d . .
H13A H 0.6323 0.4807 0.1757 0.034 Uiso 1 1 calc R U
H13B H 0.6566 0.3902 0.1267 0.034 Uiso 1 1 calc R U
C14 C 0.5656(2) 0.3629(4) 0.1652(3) 0.0329(14) Uani 1 1 d . .
H14A H 0.5269 0.4048 0.1766 0.039 Uiso 1 1 calc R U
H14B H 0.5532 0.3124 0.1299 0.039 Uiso 1 1 calc R U
C15 C 0.5886(2) 0.3060(4) 0.2262(3) 0.0341(13) Uani 1 1 d . .
H15A H 0.5991 0.3463 0.2648 0.041 Uiso 1 1 calc R U
C16 C 0.5955(3) 0.2047(4) 0.2308(3) 0.0434(15) Uani 1 1 d . .
H16A H 0.5855 0.1616 0.1934 0.052 Uiso 1 1 calc R U
H16B H 0.6104 0.1745 0.2716 0.052 Uiso 1 1 calc R U
C17 C 0.2977(2) 0.9728(4) 0.1711(2) 0.0255(12) Uani 1 1 d . .
H17A H 0.2649 1.0280 0.1645 0.031 Uiso 1 1 calc R U
H17B H 0.3287 0.9972 0.2057 0.031 Uiso 1 1 calc R U
C18 C 0.2647(2) 0.8766(4) 0.1959(2) 0.0298(13) Uani 1 1 d . .
H18A H 0.2383 0.8941 0.2359 0.036 Uiso 1 1 calc R U
H18B H 0.2980 0.8255 0.2098 0.036 Uiso 1 1 calc R U
C19 C 0.2214(2) 0.8278(4) 0.1432(3) 0.0351(14) Uani 1 1 d . .
H19A H 0.1817 0.8621 0.1334 0.042 Uiso 1 1 calc R U
C20 C 0.2340(2) 0.7425(4) 0.1101(3) 0.0366(14) Uani 1 1 d . .
H20A H 0.2731 0.7057 0.1184 0.044 Uiso 1 1 calc R U
H20B H 0.2039 0.7172 0.0778 0.044 Uiso 1 1 calc R U
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Cl Cl 0.1484 0.1585 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Ag Ag -0.8971 1.1015 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
I I -0.4742 1.8119 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
C9 Ag1 I1 123.29(12) . 3_655
C9 Ag1 I1 114.65(12) . .
I1 Ag1 I1 105.983(15) 3_655 .
C9 Ag1 Ag2 124.31(12) . .
I1 Ag1 Ag2 109.756(15) 3_655 .
I1 Ag1 Ag2 59.518(13) . .
C9 Ag1 I2 100.46(11) . .
I1 Ag1 I2 93.758(14) 3_655 .
I1 Ag1 I2 117.378(15) . .
Ag2 Ag1 I2 57.865(13) . .
C9 Ag1 Ag1 160.03(11) . 3_655
I1 Ag1 Ag1 55.396(12) 3_655 3_655
I1 Ag1 Ag1 54.358(13) . 3_655
Ag2 Ag1 Ag1 67.341(13) . 3_655
I2 Ag1 Ag1 99.503(9) . 3_655
Ag1 I1 Ag1 70.248(15) 3_655 .
Ag1 I1 Ag2 74.825(13) 3_655 .
Ag1 I1 Ag2 62.769(13) . .
C9 N1 C7 110.3(4) . .
C9 N1 C1 125.8(4) . .
C7 N1 C1 123.9(4) . .
C6 C1 C2 121.2(4) . .
C6 C1 N1 120.2(4) . .
C2 C1 N1 118.5(4) . .
Cl2 C1S Cl1 112.1(3) . .
Cl2 C1S H1SA 109.2 . .
Cl1 C1S H1SA 109.2 . .
Cl2 C1S H1SB 109.2 . .
Cl1 C1S H1SB 109.2 . .
H1SA C1S H1SB 107.9 . .
C10 Ag2 I2 121.80(12) . 3_655
C10 Ag2 I1 110.32(12) . .
I2 Ag2 I1 98.597(14) 3_655 .
C10 Ag2 I2 102.49(12) . .
I2 Ag2 I2 103.675(15) 3_655 .
I1 Ag2 I2 121.188(15) . .
C10 Ag2 Ag1 124.46(12) . .
I2 Ag2 Ag1 113.730(15) 3_655 .
I1 Ag2 Ag1 57.712(13) . .
I2 Ag2 Ag1 63.482(14) . .
C10 Ag2 Ag2 148.74(12) . 3_655
I2 Ag2 Ag2 57.542(12) 3_655 3_655
I1 Ag2 Ag2 100.171(9) . 3_655
I2 Ag2 Ag2 53.596(13) . 3_655
Ag1 Ag2 Ag2 66.986(13) . 3_655
Ag2 I2 Ag2 68.862(15) 3_655 .
Ag2 I2 Ag1 70.916(12) 3_655 .
Ag2 I2 Ag1 58.653(12) . .
C9 N2 C8 111.5(4) . .
C9 N2 C17 123.2(4) . .
C8 N2 C17 125.1(4) . .
C3 C2 C1 119.1(4) . .
C3 C2 H2A 120.5 . .
C1 C2 H2A 120.5 . .
C10 N3 C11 111.1(4) . .
C10 N3 C5 125.5(4) . .
C11 N3 C5 123.4(4) . .
C4 C3 C2 121.3(4) . .
C4 C3 H3A 119.3 . .
C2 C3 H3A 119.3 . .
C10 N4 C12 111.7(4) . .
C10 N4 C13 123.5(4) . .
C12 N4 C13 124.8(4) . .
C3 C4 C5 119.1(5) . .
C3 C4 H4A 120.5 . .
C5 C4 H4A 120.5 . .
C6 C5 C4 121.1(4) . .
C6 C5 N3 120.3(4) . .
C4 C5 N3 118.5(4) . .
C1 C6 C5 118.2(4) . .
C1 C6 H6A 120.9 . .
C5 C6 H6A 120.9 . .
C8 C7 N1 107.0(4) . .
C8 C7 H7A 126.5 . .
N1 C7 H7A 126.5 . .
C7 C8 N2 107.2(4) . .
C7 C8 H8A 126.4 . .
N2 C8 H8A 126.4 . .
N2 C9 N1 103.9(4) . .
N2 C9 Ag1 126.5(3) . .
N1 C9 Ag1 129.4(3) . .
N4 C10 N3 103.2(4) . .
N4 C10 Ag2 126.0(3) . .
N3 C10 Ag2 130.8(3) . .
C12 C11 N3 107.2(4) . .
C12 C11 H11A 126.4 . .
N3 C11 H11A 126.4 . .
C11 C12 N4 106.8(4) . .
C11 C12 H12A 126.6 . .
N4 C12 H12A 126.6 . .
N4 C13 C14 113.1(4) . .
N4 C13 H13A 109.0 . .
C14 C13 H13A 109.0 . .
N4 C13 H13B 109.0 . .
C14 C13 H13B 109.0 . .
H13A C13 H13B 107.8 . .
C15 C14 C13 110.0(4) . .
C15 C14 H14A 109.7 . .
C13 C14 H14A 109.7 . .
C15 C14 H14B 109.7 . .
C13 C14 H14B 109.7 . .
H14A C14 H14B 108.2 . .
C16 C15 C14 125.2(5) . .
C16 C15 H15A 117.4 . .
C14 C15 H15A 117.4 . .
C15 C16 H16A 120.0 . .
C15 C16 H16B 120.0 . .
H16A C16 H16B 120.0 . .
N2 C17 C18 112.7(4) . .
N2 C17 H17A 109.1 . .
C18 C17 H17A 109.1 . .
N2 C17 H17B 109.1 . .
C18 C17 H17B 109.1 . .
H17A C17 H17B 107.8 . .
C17 C18 C19 112.6(4) . .
C17 C18 H18A 109.1 . .
C19 C18 H18A 109.1 . .
C17 C18 H18B 109.1 . .
C19 C18 H18B 109.1 . .
H18A C18 H18B 107.8 . .
C20 C19 C18 125.6(5) . .
C20 C19 H19A 117.2 . .
C18 C19 H19A 117.2 . .
C19 C20 H20A 120.0 . .
C19 C20 H20B 120.0 . .
H20A C20 H20B 120.0 . .
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Ag1 C9 2.185(5) .
Ag1 I1 2.8482(5) 3_655
Ag1 I1 2.8846(5) .
Ag1 Ag2 3.0341(6) .
Ag1 I2 3.1789(5) .
Ag1 Ag1 3.2985(8) 3_655
I1 Ag1 2.8481(5) 3_655
I1 Ag2 2.9406(5) .
N1 C9 1.379(5) .
N1 C7 1.386(5) .
N1 C1 1.435(6) .
C1 C6 1.385(6) .
C1 C2 1.391(6) .
C1S Cl2 1.748(5) .
C1S Cl1 1.757(5) .
C1S H1SA 0.9900 .
C1S H1SB 0.9900 .
Ag2 C10 2.184(5) .
Ag2 I2 2.8696(5) 3_655
Ag2 I2 3.0084(5) .
Ag2 Ag2 3.3254(8) 3_655
I2 Ag2 2.8695(5) 3_655
N2 C9 1.349(5) .
N2 C8 1.381(5) .
N2 C17 1.459(5) .
C2 C3 1.377(6) .
C2 H2A 0.9500 .
N3 C10 1.373(5) .
N3 C11 1.388(5) .
N3 C5 1.437(5) .
C3 C4 1.368(6) .
C3 H3A 0.9500 .
N4 C10 1.353(5) .
N4 C12 1.394(6) .
N4 C13 1.467(5) .
C4 C5 1.395(6) .
C4 H4A 0.9500 .
C5 C6 1.390(6) .
C6 H6A 0.9500 .
C7 C8 1.333(6) .
C7 H7A 0.9500 .
C8 H8A 0.9500 .
C11 C12 1.322(6) .
C11 H11A 0.9500 .
C12 H12A 0.9500 .
C13 C14 1.510(6) .
C13 H13A 0.9900 .
C13 H13B 0.9900 .
C14 C15 1.494(6) .
C14 H14A 0.9900 .
C14 H14B 0.9900 .
C15 C16 1.315(7) .
C15 H15A 0.9500 .
C16 H16A 0.9500 .
C16 H16B 0.9500 .
C17 C18 1.496(6) .
C17 H17A 0.9900 .
C17 H17B 0.9900 .
C18 C19 1.513(6) .
C18 H18A 0.9900 .
C18 H18B 0.9900 .
C19 C20 1.305(6) .
C19 H19A 0.9500 .
C20 H20A 0.9500 .
C20 H20B 0.9500 .
loop_
_geom_torsion_atom_site_label_1
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion
C9 N1 C1 C6 40.2(6)
C7 N1 C1 C6 -141.6(4)
C9 N1 C1 C2 -142.5(4)
C7 N1 C1 C2 35.7(6)
C6 C1 C2 C3 -1.8(7)
N1 C1 C2 C3 -179.0(4)
C1 C2 C3 C4 0.5(7)
C2 C3 C4 C5 0.2(7)
C3 C4 C5 C6 0.3(7)
C3 C4 C5 N3 178.6(4)
C10 N3 C5 C6 -43.7(6)
C11 N3 C5 C6 139.7(4)
C10 N3 C5 C4 138.0(4)
C11 N3 C5 C4 -38.6(6)
C2 C1 C6 C5 2.2(6)
N1 C1 C6 C5 179.4(4)
C4 C5 C6 C1 -1.4(6)
N3 C5 C6 C1 -179.7(4)
C9 N1 C7 C8 -1.2(5)
C1 N1 C7 C8 -179.7(4)
N1 C7 C8 N2 1.7(5)
C9 N2 C8 C7 -1.7(5)
C17 N2 C8 C7 -176.0(4)
C8 N2 C9 N1 1.0(5)
C17 N2 C9 N1 175.4(4)
C8 N2 C9 Ag1 176.4(3)
C17 N2 C9 Ag1 -9.2(6)
C7 N1 C9 N2 0.1(5)
C1 N1 C9 N2 178.6(4)
C7 N1 C9 Ag1 -175.2(3)
C1 N1 C9 Ag1 3.3(6)
C12 N4 C10 N3 -1.4(5)
C13 N4 C10 N3 -179.8(4)
C12 N4 C10 Ag2 176.9(3)
C13 N4 C10 Ag2 -1.5(6)
C11 N3 C10 N4 1.6(5)
C5 N3 C10 N4 -175.4(4)
C11 N3 C10 Ag2 -176.6(3)
C5 N3 C10 Ag2 6.5(7)
C10 N3 C11 C12 -1.2(5)
C5 N3 C11 C12 175.8(4)
N3 C11 C12 N4 0.3(5)
C10 N4 C12 C11 0.7(5)
C13 N4 C12 C11 179.1(4)
C10 N4 C13 C14 87.4(5)
C12 N4 C13 C14 -90.7(5)
N4 C13 C14 C15 -177.6(4)
C13 C14 C15 C16 -116.5(6)
C9 N2 C17 C18 -72.8(5)
C8 N2 C17 C18 100.9(5)
N2 C17 C18 C19 -52.9(6)
C17 C18 C19 C20 106.7(6)
