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#$Date: 2016-03-26 14:25:19 +0200 (Sat, 26 Mar 2016) $
#$Revision: 180261 $
#$URL: svn://www.crystallography.net/cod/cif/7/11/47/7114700.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_7114700
loop_
_publ_author_name
'Garrison, Jered C.'
'Simons, Richard S.'
'Kofron, William G.'
'Tessier, Claire A.'
'Youngs, Wiley J.'
_publ_section_title
;
 Synthesis and structural characterization of a silver complex of a
 mixed-donor N-heterocyclic carbene linked cyclophane
;
_journal_issue                   18
_journal_name_full               'Chemical Communications'
_journal_page_first              1780
_journal_paper_doi               10.1039/b105751k
_journal_year                    2001
_chemical_formula_sum            'C22 H26 Ag2 F16 N6 O P2 S'
_chemical_formula_weight         502.11
_chemical_name_systematic
; 
? 
;
_space_group_IT_number           2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                110.21(3)
_cell_angle_beta                 96.34(3)
_cell_angle_gamma                102.46(3)
_cell_formula_units_Z            2
_cell_length_a                   10.389(2)
_cell_length_b                   11.272(2)
_cell_length_c                   14.104(3)
_cell_measurement_temperature    200(2)
_cell_volume                     1482.3(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0214
_diffrn_reflns_av_sigmaI/netI    0.0364
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            10137
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.817
_exptl_absorpt_correction_T_max  0.9680
_exptl_absorpt_correction_T_min  0.8602
_exptl_crystal_density_diffrn    1.125
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             492
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.082
_refine_diff_density_min         -1.451
_refine_diff_density_rms         0.126
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.994
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     454
_refine_ls_number_reflns         5212
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.994
_refine_ls_R_factor_all          0.0617
_refine_ls_R_factor_gt           0.0444
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[σ²(Fo²)+(0.0845P)²+3.8803P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1229
_refine_ls_wR_factor_ref         0.1343
_reflns_number_gt                4085
_reflns_number_total             5212
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b105751k.txt
_cod_data_source_block           s
_cod_original_cell_volume        1482.3(5)
_cod_database_code               7114700
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, -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_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
Ag1 Ag 0.46719(5) -0.48300(4) 0.40109(3) 0.03616(16) Uani 1 1 d . . .
Ag2 Ag 0.38442(4) -0.72489(4) 0.41655(3) 0.03138(15) Uani 1 1 d . . .
S S 0.2407(5) -1.0091(4) 0.1999(3) 0.1449(15) Uani 1 1 d . . .
P1 P 0.0000 0.5000 1.0000 0.0677(8) Uani 1 2 d S . .
P2 P 0.0000 0.0000 0.5000 0.0428(6) Uani 1 2 d S . .
P3 P -0.28205(19) -0.98115(18) 0.14196(13) 0.0499(5) Uani 1 1 d . . .
F1 F 0.1294(6) 0.5639(6) 1.0896(5) 0.1053(18) Uani 1 1 d . . .
F2 F 0.0765(6) 0.5674(7) 0.9330(5) 0.106(2) Uani 1 1 d . . .
F3 F 0.0581(6) 0.3780(6) 0.9567(5) 0.1054(19) Uani 1 1 d . . .
F4 F 0.0758(6) -0.0090(7) 0.5978(5) 0.116(2) Uani 1 1 d . . .
F5 F 0.0155(5) 0.1483(5) 0.5667(6) 0.119(3) Uani 1 1 d . . .
F6 F 0.1424(5) 0.0372(6) 0.4717(4) 0.1000(19) Uani 1 1 d . . .
F10 F -0.3957(8) -1.0419(11) 0.0465(5) 0.193(5) Uani 1 1 d . A .
F12 F -0.1660(8) -0.9118(8) 0.2355(6) 0.148(3) Uani 1 1 d . A .
F7 F -0.176(2) -0.993(2) 0.082(2) 0.154(11) Uani 0.50 1 d P A 1
F8 F -0.325(3) -1.1199(14) 0.122(2) 0.176(9) Uani 0.50 1 d P A 1
F9 F -0.2534(16) -0.8265(12) 0.1565(14) 0.117(5) Uani 0.50 1 d P A 1
F11 F -0.3976(15) -0.956(2) 0.2058(11) 0.126(8) Uani 0.50 1 d P A 1
F13 F -0.356(2) -0.883(2) 0.1775(12) 0.134(7) Uani 0.50 1 d P A 2
F14 F -0.209(2) -1.1051(18) 0.1118(11) 0.116(6) Uani 0.50 1 d P A 2
F15 F -0.204(2) -0.940(2) 0.0662(16) 0.127(9) Uani 0.50 1 d P A 2
F16 F -0.3306(16) -1.0416(15) 0.2226(10) 0.101(4) Uani 0.50 1 d P A 2
O O 0.3357(6) -0.9483(4) 0.2973(4) 0.0633(14) Uani 1 1 d . . .
N1 N 0.5472(5) -0.4884(4) 0.2498(4) 0.0331(10) Uani 1 1 d . . .
N2 N 0.5486(4) -0.2169(4) 0.3833(3) 0.0284(10) Uani 1 1 d . . .
N3 N 0.3973(5) -0.1931(4) 0.4740(3) 0.0336(11) Uani 1 1 d . . .
N4 N 0.1741(5) -0.4299(5) 0.4430(4) 0.0340(11) Uani 1 1 d . . .
N5 N 0.1467(5) -0.6923(4) 0.2801(4) 0.0357(11) Uani 1 1 d . . .
N6 N 0.3096(5) -0.7144(4) 0.2011(3) 0.0300(10) Uani 1 1 d . . .
C1 C 0.6465(7) -0.4977(7) 0.0733(5) 0.0552(18) Uani 1 1 d . . .
H1A H 0.6804 -0.5009 0.0128 0.066 Uiso 1 1 calc R . .
C2 C 0.6752(7) -0.3793(7) 0.1580(5) 0.0518(17) Uani 1 1 d . . .
H2A H 0.7290 -0.3008 0.1560 0.062 Uiso 1 1 calc R . .
C3 C 0.6246(6) -0.3777(6) 0.2445(4) 0.0342(13) Uani 1 1 d . . .
C4 C 0.6629(6) -0.2541(6) 0.3391(5) 0.0373(13) Uani 1 1 d . . .
H4A H 0.7249 -0.2648 0.3923 0.045 Uiso 1 1 calc R . .
H4B H 0.7127 -0.1814 0.3219 0.045 Uiso 1 1 calc R . .
C5 C 0.4773(6) -0.1425(6) 0.3517(5) 0.0393(14) Uani 1 1 d . . .
H5A H 0.4920 -0.1084 0.2997 0.047 Uiso 1 1 calc R . .
C6 C 0.3826(7) -0.1281(6) 0.4096(4) 0.0390(14) Uani 1 1 d . . .
H6A H 0.3175 -0.0812 0.4062 0.047 Uiso 1 1 calc R . .
C7 C 0.5014(6) -0.2485(5) 0.4595(4) 0.0323(12) Uani 1 1 d . . .
C8 C 0.3117(7) -0.1997(6) 0.5497(5) 0.0421(15) Uani 1 1 d . . .
H8A H 0.2403 -0.1561 0.5421 0.051 Uiso 1 1 calc R . .
H8B H 0.3668 -0.1520 0.6203 0.051 Uiso 1 1 calc R . .
C9 C 0.2486(6) -0.3382(6) 0.5353(5) 0.0366(13) Uani 1 1 d . . .
C10 C 0.2528(6) -0.3981(6) 0.6051(5) 0.0397(14) Uani 1 1 d . . .
H10A H 0.2960 -0.3575 0.6758 0.048 Uiso 1 1 calc R . .
C11 C 0.1807(6) -0.5320(6) 0.5516(5) 0.0396(14) Uani 1 1 d . . .
H11A H 0.1670 -0.5977 0.5800 0.048 Uiso 1 1 calc R . .
C12 C 0.1345(6) -0.5496(6) 0.4521(5) 0.0382(14) Uani 1 1 d . . .
C13 C 0.1328(7) -0.4037(6) 0.3496(5) 0.0436(15) Uani 1 1 d . . .
H13A H 0.0789 -0.4858 0.2943 0.065 Uiso 1 1 calc R . .
H13B H 0.2131 -0.3677 0.3273 0.065 Uiso 1 1 calc R . .
H13C H 0.0792 -0.3403 0.3657 0.065 Uiso 1 1 calc R . .
C14 C 0.0655(6) -0.6710(6) 0.3608(5) 0.0425(15) Uani 1 1 d . . .
H14A H 0.0496 -0.7473 0.3818 0.051 Uiso 1 1 calc R . .
H14B H -0.0230 -0.6641 0.3327 0.051 Uiso 1 1 calc R . .
C15 C 0.0958(7) -0.7241(6) 0.1784(5) 0.0476(16) Uani 1 1 d . . .
H15A H 0.0056 -0.7341 0.1486 0.057 Uiso 1 1 calc R . .
C16 C 0.1990(7) -0.7388(6) 0.1278(5) 0.0458(16) Uani 1 1 d . . .
H16A H 0.1950 -0.7614 0.0559 0.055 Uiso 1 1 calc R . .
C17 C 0.2788(6) -0.6854(5) 0.2959(4) 0.0314(12) Uani 1 1 d . . .
C18 C 0.4396(6) -0.7241(5) 0.1761(4) 0.0373(14) Uani 1 1 d . . .
H18A H 0.4258 -0.7991 0.1099 0.045 Uiso 1 1 calc R . .
H18B H 0.4915 -0.7424 0.2302 0.045 Uiso 1 1 calc R . .
C19 C 0.5202(6) -0.6022(6) 0.1675(4) 0.0348(13) Uani 1 1 d . . .
C20 C 0.5684(7) -0.6095(7) 0.0784(5) 0.0514(17) Uani 1 1 d . . .
H20A H 0.5477 -0.6911 0.0215 0.062 Uiso 1 1 calc R . .
C21 C 0.0974(12) -1.0764(15) 0.2061(13) 0.148(6) Uani 1 1 d . . .
H21A H 0.0607 -1.0113 0.2529 0.222 Uiso 1 1 calc R . .
H21B H 0.1009 -1.1461 0.2320 0.222 Uiso 1 1 calc R . .
H21C H 0.0395 -1.1145 0.1372 0.222 Uiso 1 1 calc R . .
C22 C 0.2922(13) -1.1233(14) 0.1199(7) 0.117(4) Uani 1 1 d . . .
H22A H 0.3828 -1.0855 0.1122 0.175 Uiso 1 1 calc R . .
H22B H 0.2306 -1.1607 0.0526 0.175 Uiso 1 1 calc R . .
H22C H 0.2943 -1.1926 0.1465 0.175 Uiso 1 1 calc R . .
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'
F F 0.0171 0.0103 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
P P 0.1023 0.0942 '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'
N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
S S 0.1246 0.1234 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0060 '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
N1 Ag1 C7 91.19(17) . .
N1 Ag1 C17 89.78(17) . .
C7 Ag1 C17 136.70(19) . .
N1 Ag1 Ag2 115.03(12) . .
C7 Ag1 Ag2 153.74(13) . .
C17 Ag1 Ag2 47.71(13) . .
N1 Ag1 Ag2 115.39(12) . 2_646
C7 Ag1 Ag2 47.86(13) . 2_646
C17 Ag1 Ag2 154.83(13) . 2_646
Ag2 Ag1 Ag2 115.60(3) . 2_646
N1 Ag1 Ag1 143.06(11) . 2_646
C7 Ag1 Ag1 101.62(13) . 2_646
C17 Ag1 Ag1 103.20(13) . 2_646
Ag2 Ag1 Ag1 58.45(4) . 2_646
Ag2 Ag1 Ag1 57.15(3) 2_646 2_646
C7 Ag2 C17 176.2(2) 2_646 .
C7 Ag2 O 95.68(18) 2_646 .
C17 Ag2 O 87.46(18) . .
C7 Ag2 Ag1 116.24(15) 2_646 .
C17 Ag2 Ag1 59.99(15) . .
O Ag2 Ag1 134.14(12) . .
C7 Ag2 Ag1 56.37(14) 2_646 2_646
C17 Ag2 Ag1 120.19(14) . 2_646
O Ag2 Ag1 150.82(12) . 2_646
Ag1 Ag2 Ag1 64.40(3) . 2_646
O S C21 114.7(7) . .
O S C22 109.6(6) . .
C21 S C22 106.0(8) . .
F3 P1 F3 180.000(4) . 2_567
F3 P1 F1 92.6(3) . 2_567
F3 P1 F1 87.4(3) 2_567 2_567
F3 P1 F1 87.4(3) . .
F3 P1 F1 92.6(3) 2_567 .
F1 P1 F1 180.000(2) 2_567 .
F3 P1 F2 89.5(3) . 2_567
F3 P1 F2 90.5(3) 2_567 2_567
F1 P1 F2 89.8(3) 2_567 2_567
F1 P1 F2 90.2(3) . 2_567
F3 P1 F2 90.5(3) . .
F3 P1 F2 89.5(3) 2_567 .
F1 P1 F2 90.2(3) 2_567 .
F1 P1 F2 89.8(3) . .
F2 P1 F2 180.000(3) 2_567 .
F4 P2 F4 180.0(3) 2_556 .
F4 P2 F5 87.6(4) 2_556 2_556
F4 P2 F5 92.4(4) . 2_556
F4 P2 F5 92.4(4) 2_556 .
F4 P2 F5 87.6(4) . .
F5 P2 F5 180.0(6) 2_556 .
F4 P2 F6 93.0(3) 2_556 .
F4 P2 F6 87.0(3) . .
F5 P2 F6 89.1(3) 2_556 .
F5 P2 F6 90.9(3) . .
F4 P2 F6 87.0(3) 2_556 2_556
F4 P2 F6 93.0(3) . 2_556
F5 P2 F6 90.9(3) 2_556 2_556
F5 P2 F6 89.1(3) . 2_556
F6 P2 F6 180.000(1) . 2_556
F8 P3 F13 128.2(15) . .
F8 P3 F7 94.4(14) . .
F13 P3 F7 134.2(15) . .
F8 P3 F12 109.9(10) . .
F13 P3 F12 93.9(8) . .
F7 P3 F12 84.8(11) . .
F8 P3 F10 74.0(10) . .
F13 P3 F10 84.2(8) . .
F7 P3 F10 94.0(12) . .
F12 P3 F10 176.0(6) . .
F8 P3 F15 117.5(15) . .
F13 P3 F15 104.4(13) . .
F7 P3 F15 31.0(11) . .
F12 P3 F15 95.5(10) . .
F10 P3 F15 81.6(10) . .
F8 P3 F16 54.8(12) . .
F13 P3 F16 89.6(10) . .
F7 P3 F16 133.8(13) . .
F12 P3 F16 77.0(7) . .
F10 P3 F16 106.5(7) . .
F15 P3 F16 164.6(10) . .
F8 P3 F11 90.3(14) . .
F13 P3 F11 40.8(10) . .
F7 P3 F11 174.9(14) . .
F12 P3 F11 95.4(7) . .
F10 P3 F11 85.5(7) . .
F15 P3 F11 144.1(12) . .
F16 P3 F11 50.9(8) . .
F8 P3 F9 172.6(11) . .
F13 P3 F9 46.6(10) . .
F7 P3 F9 89.1(11) . .
F12 P3 F9 76.9(7) . .
F10 P3 F9 99.3(8) . .
F15 P3 F9 63.5(11) . .
F16 P3 F9 126.1(8) . .
F11 P3 F9 86.0(9) . .
F8 P3 F14 44.8(9) . .
F13 P3 F14 171.5(12) . .
F7 P3 F14 54.3(11) . .
F12 P3 F14 85.6(8) . .
F10 P3 F14 96.8(8) . .
F15 P3 F14 84.2(9) . .
F16 P3 F14 82.0(7) . .
F11 P3 F14 130.7(11) . .
F9 P3 F14 140.9(10) . .
S O Ag2 126.7(3) . .
C19 N1 C3 118.4(5) . .
C19 N1 Ag1 120.6(4) . .
C3 N1 Ag1 120.9(4) . .
C7 N2 C5 111.5(5) . .
C7 N2 C4 125.3(5) . .
C5 N2 C4 123.1(5) . .
C7 N3 C6 111.0(5) . .
C7 N3 C8 125.3(5) . .
C6 N3 C8 123.7(5) . .
C9 N4 C12 109.2(5) . .
C9 N4 C13 125.7(5) . .
C12 N4 C13 124.9(5) . .
C17 N5 C15 111.1(5) . .
C17 N5 C14 125.1(5) . .
C15 N5 C14 123.8(5) . .
C17 N6 C16 111.0(5) . .
C17 N6 C18 126.3(5) . .
C16 N6 C18 122.6(5) . .
C20 C1 C2 119.1(6) . .
C3 C2 C1 119.1(6) . .
N1 C3 C2 121.9(6) . .
N1 C3 C4 118.0(5) . .
C2 C3 C4 119.9(6) . .
N2 C4 C3 114.6(5) . .
C6 C5 N2 106.0(5) . .
C5 C6 N3 107.5(5) . .
N2 C7 N3 104.0(4) . .
N2 C7 Ag2 126.9(4) . 2_646
N3 C7 Ag2 121.2(4) . 2_646
N2 C7 Ag1 104.2(3) . .
N3 C7 Ag1 121.8(4) . .
Ag2 C7 Ag1 75.78(17) 2_646 .
N3 C8 C9 111.4(5) . .
N4 C9 C10 108.1(5) . .
N4 C9 C8 122.5(5) . .
C10 C9 C8 129.5(6) . .
C9 C10 C11 107.1(6) . .
C12 C11 C10 107.8(6) . .
C11 C12 N4 107.8(5) . .
C11 C12 C14 130.8(6) . .
N4 C12 C14 121.2(5) . .
N5 C14 C12 111.1(5) . .
C16 C15 N5 106.9(6) . .
C15 C16 N6 106.3(5) . .
N5 C17 N6 104.7(5) . .
N5 C17 Ag2 125.2(4) . .
N6 C17 Ag2 122.9(4) . .
N5 C17 Ag1 126.1(4) . .
N6 C17 Ag1 101.2(3) . .
Ag2 C17 Ag1 72.31(16) . .
N6 C18 C19 113.2(5) . .
N1 C19 C20 122.1(6) . .
N1 C19 C18 117.8(5) . .
C20 C19 C18 120.1(5) . .
C1 C20 C19 119.4(6) . .
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Ag1 N1 2.360(5) .
Ag1 C7 2.412(5) .
Ag1 C17 2.516(6) .
Ag1 Ag2 2.7680(9) .
Ag1 Ag2 2.8077(16) 2_646
Ag1 Ag1 2.9712(10) 2_646
Ag2 C7 2.148(5) 2_646
Ag2 C17 2.149(6) .
Ag2 O 2.401(5) .
Ag2 Ag1 2.8077(16) 2_646
S O 1.444(6) .
S C21 1.545(13) .
S C22 1.626(11) .
P1 F3 1.577(5) .
P1 F3 1.577(5) 2_567
P1 F1 1.582(6) 2_567
P1 F1 1.582(6) .
P1 F2 1.582(5) 2_567
P1 F2 1.582(5) .
P2 F4 1.558(5) 2_556
P2 F4 1.558(5) .
P2 F5 1.572(5) 2_556
P2 F5 1.572(5) .
P2 F6 1.581(5) .
P2 F6 1.581(5) 2_556
P3 F8 1.446(12) .
P3 F13 1.464(11) .
P3 F7 1.466(16) .
P3 F12 1.528(6) .
P3 F10 1.529(7) .
P3 F15 1.546(16) .
P3 F16 1.589(10) .
P3 F11 1.594(14) .
P3 F9 1.639(12) .
P3 F14 1.683(12) .
N1 C19 1.348(7) .
N1 C3 1.362(7) .
N2 C7 1.352(7) .
N2 C5 1.381(7) .
N2 C4 1.474(7) .
N3 C7 1.362(7) .
N3 C6 1.366(7) .
N3 C8 1.474(8) .
N4 C9 1.366(8) .
N4 C12 1.378(7) .
N4 C13 1.484(8) .
N5 C17 1.347(7) .
N5 C15 1.364(8) .
N5 C14 1.475(8) .
N6 C17 1.356(7) .
N6 C16 1.368(8) .
N6 C18 1.450(7) .
C1 C20 1.374(10) .
C1 C2 1.395(10) .
C2 C3 1.377(9) .
C3 C4 1.496(8) .
C5 C6 1.348(9) .
C7 Ag2 2.148(5) 2_646
C8 C9 1.489(9) .
C9 C10 1.375(9) .
C10 C11 1.417(9) .
C11 C12 1.362(9) .
C12 C14 1.483(9) .
C15 C16 1.360(10) .
C18 C19 1.498(8) .
C19 C20 1.386(9) .
