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#$Date: 2026-02-24 23:57:06 +0100 (Tue 24 de Feb de 2026) $
#$Revision: 304603 $
#$URL: svn://www.crystallography.net/cod/cif/7/13/54/7135456.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_7135456
loop_
_publ_author_name
'Campillo-Alvarado, Gonzalo'
'Vargas-Olvera, Eva C'
'Swenson, Dale C.'
'Morales-Rojas, Hugo'
'Höpfl, Herbert'
'MacGillivray, Leonard R.'
_publ_section_title
;
 Rotisserie-like motion enables guest transport in a nonporous organic
 crystal involving a diboron host.
;
_journal_issue                   15
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              4519
_journal_page_last               4522
_journal_paper_doi               10.1039/d5cc05394c
_journal_volume                  62
_journal_year                    2026
_chemical_formula_moiety         'C34 H22 B2 F4 N4 O4, C6 H6'
_chemical_formula_sum            'C40 H28 B2 F4 N4 O4'
_chemical_formula_weight         726.28
_chemical_name_systematic
'2,4-difluorophenylboronic acid catechol ester adduct of 4,4,'-azopyridine benzene solvate'
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2025-12-08
_audit_creation_method
;
Olex2 1.5
(compiled 2025.07.13 svn.rb7424aed for OlexSys, GUI svn.r7314)
;
_audit_update_record
;
2025-12-16 deposited with the CCDC.	2026-01-13 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.484(5)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.5341(8)
_cell_length_b                   14.4259(14)
_cell_length_c                   16.8748(17)
_cell_measurement_reflns_used    4171
_cell_measurement_temperature    298.15
_cell_measurement_theta_max      25.35
_cell_measurement_theta_min      1.0
_cell_volume                     1832.3(3)
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT  (Sheldrick, 2015)'
_diffrn_ambient_temperature      298.15
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1190
_diffrn_reflns_av_unetI/netI     0.1185
_diffrn_reflns_Laue_measured_fraction_full 0.978
_diffrn_reflns_Laue_measured_fraction_max 0.978
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            8676
_diffrn_reflns_point_group_measured_fraction_full 0.978
_diffrn_reflns_point_group_measured_fraction_max 0.978
_diffrn_reflns_theta_full        23.999
_diffrn_reflns_theta_max         23.999
_diffrn_reflns_theta_min         2.824
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.9943
_exptl_absorpt_correction_T_min  0.9434
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            'reddish orange'
_exptl_crystal_colour_modifier   reddish
_exptl_crystal_colour_primary    orange
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_description       prism
_exptl_crystal_F_000             748
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.428
_refine_diff_density_min         -0.218
_refine_diff_density_rms         0.042
_refine_ls_extinction_coef       0.014(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   0.954
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     260
_refine_ls_number_reflns         2823
_refine_ls_number_restraints     36
_refine_ls_restrained_S_all      0.952
_refine_ls_R_factor_all          0.1749
_refine_ls_R_factor_gt           0.0660
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[σ²(Fo²)+(0.1037P)²] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1601
_refine_ls_wR_factor_ref         0.2100
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1208
_reflns_number_total             2823
_reflns_threshold_expression     'I > 2σ(I)'
_cod_data_source_file            d5cc05394c2.cif
_cod_data_source_block           S
_cod_database_code               7135456
_shelx_shelxl_version_number     2018/3
_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_max   0.988
_shelx_estimated_absorpt_t_min   0.967
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2. Rigid body (RIGU) restrains
 C20, C22, H22, C23, C21, H23, C18, H21, C19, H18, H20, H19
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
3. Others
 Fixed Sof: C22(0.5) H22(0.5) C23(0.5) H23(0.5) C18(0.5) H18(0.5) C19(0.5)
 H19(0.5) C20(0.5) H20(0.5) C21(0.5) H21(0.5)
4.a Aromatic/amide H refined with riding coordinates:
 C14(H14), C17(H17), C16(H16), C13(H13), C12(H12), C3(H3), C6(H6), C9(H9),
 C11(H11), C5(H5), C10(H10), C22(H22), C23(H23), C18(H18), C19(H19), C20(H20),
 C21(H21)
4.b Fitted hexagon refined as free rotating group:
 C22(C23,C18,C19,C20,C21)
;
_olex2_submission_original_sample_id S-298K
_olex2_submission_special_instructions 'No special instructions were received'
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x, y+1/2, -z+1/2'
'-x, -y, -z'
'x, -y-1/2, z-1/2'
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
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
N2 N 0.4828(5) 0.0159(2) 0.03259(19) 0.0639(11) Uani 1 1 d . . . . .
F1 F 0.4878(5) -0.42543(17) 0.18448(17) 0.0881(10) Uani 1 1 d . . . . .
O1 O 0.3204(5) -0.21233(19) 0.34640(18) 0.0727(10) Uani 1 1 d . . . . .
O2 O 0.5722(5) -0.29143(18) 0.30599(16) 0.0666(10) Uani 1 1 d . . . . .
N1 N 0.4245(5) -0.1812(2) 0.21072(19) 0.0570(10) Uani 1 1 d . . . . .
C15 C 0.4678(6) -0.0547(3) 0.0921(3) 0.0569(12) Uani 1 1 d . . . . .
C14 C 0.5316(7) -0.1436(3) 0.0849(3) 0.0696(14) Uani 1 1 d . . . . .
H14 H 0.589577 -0.161737 0.039948 0.083 Uiso 1 1 calc R U . . .
C2 C 0.3091(7) -0.4128(3) 0.1982(3) 0.0656(13) Uani 1 1 d . . . . .
C17 C 0.3644(7) -0.0948(3) 0.2184(3) 0.0694(15) Uani 1 1 d . . . . .
H17 H 0.306715 -0.078197 0.263900 0.083 Uiso 1 1 calc R U . . .
C16 C 0.3867(7) -0.0296(3) 0.1597(3) 0.0723(15) Uani 1 1 d . . . . .
H16 H 0.346881 0.030800 0.166089 0.087 Uiso 1 1 calc R U . . .
C1 C 0.2620(8) -0.3364(3) 0.2409(2) 0.0598(13) Uani 1 1 d . . . . .
C13 C 0.5079(7) -0.2037(3) 0.1448(3) 0.0726(15) Uani 1 1 d . . . . .
H13 H 0.551689 -0.263661 0.140186 0.087 Uiso 1 1 calc R U . . .
C12 C 0.4689(11) -0.1370(3) 0.4622(3) 0.0916(19) Uani 1 1 d . . . . .
H12 H 0.368232 -0.106295 0.478543 0.110 Uiso 1 1 calc R U . . .
B14 B 0.3933(8) -0.2615(3) 0.2796(3) 0.0612(15) Uani 1 1 d . . . . .
C7 C 0.4623(9) -0.1931(3) 0.3959(3) 0.0724(16) Uani 1 1 d . . . . .
C8 C 0.6123(9) -0.2395(3) 0.3728(3) 0.0678(14) Uani 1 1 d . . . . .
C3 C 0.1993(9) -0.4764(4) 0.1630(3) 0.0825(16) Uani 1 1 d . . . . .
H3 H 0.242205 -0.526967 0.135495 0.099 Uiso 1 1 calc R U . . .
F2 F -0.0976(5) -0.5218(3) 0.1368(2) 0.1400(15) Uani 1 1 d . . . . .
C6 C 0.0818(9) -0.3267(4) 0.2452(3) 0.0850(17) Uani 1 1 d . . . . .
H6 H 0.039564 -0.276248 0.273102 0.102 Uiso 1 1 calc R U . . .
C9 C 0.7704(9) -0.2327(3) 0.4132(3) 0.0841(17) Uani 1 1 d . . . . .
H9 H 0.869991 -0.264754 0.397448 0.101 Uiso 1 1 calc R U . . .
C11 C 0.6298(13) -0.1281(4) 0.5031(3) 0.102(2) Uani 1 1 d . . . . .
H11 H 0.638172 -0.089417 0.547247 0.122 Uiso 1 1 calc R U . . .
C5 C -0.0420(9) -0.3876(5) 0.2104(4) 0.0984(19) Uani 1 1 d . . . . .
H5 H -0.163393 -0.378248 0.214349 0.118 Uiso 1 1 calc R U . . .
C10 C 0.7773(11) -0.1744(4) 0.4809(3) 0.098(2) Uani 1 1 d . . . . .
H10 H 0.883639 -0.167614 0.510436 0.118 Uiso 1 1 calc R U . . .
C4 C 0.0226(11) -0.4617(5) 0.1702(3) 0.0914(19) Uani 1 1 d . . . . .
C22 C -0.064(2) 0.0197(13) 0.0758(12) 0.235(13) Uani 0.5 1 d G . P A -1
H22 H -0.118751 0.064355 0.106253 0.282 Uiso 0.5 1 calc R U P A -1
C23 C -0.038(2) -0.0693(17) 0.1055(8) 0.232(13) Uani 0.5 1 d G . P A -1
H23 H -0.074390 -0.084219 0.155873 0.278 Uiso 0.5 1 calc R U P A -1
C18 C 0.043(2) -0.1360(10) 0.0599(14) 0.212(9) Uani 0.5 1 d G . P A -1
H18 H 0.061117 -0.195568 0.079838 0.254 Uiso 0.5 1 calc R U P A -1
C19 C 0.098(2) -0.1137(14) -0.0153(13) 0.199(12) Uani 0.5 1 d G . P A -1
H19 H 0.152264 -0.158344 -0.045818 0.239 Uiso 0.5 1 calc R U P A -1
C20 C 0.071(3) -0.0247(18) -0.0451(10) 0.202(12) Uani 0.5 1 d G . P A -1
H20 H 0.107905 -0.009771 -0.095440 0.242 Uiso 0.5 1 calc R U P A -1
C21 C -0.010(4) 0.0420(11) 0.0005(14) 0.214(11) Uani 0.5 1 d G . P A -1
H21 H -0.027602 0.101579 -0.019406 0.257 Uiso 0.5 1 calc R U P A -1
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'
B B 0.0013 0.0007 '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'
N N 0.0061 0.0033 '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
_geom_angle_publ_flag
N2 N2 C15 112.7(4) 3_655 . ?
C7 O1 B14 105.2(4) . . ?
C8 O2 B14 104.7(4) . . ?
C17 N1 C13 118.7(4) . . ?
C17 N1 B14 121.6(3) . . ?
C13 N1 B14 119.8(3) . . ?
C14 C15 N2 124.1(4) . . ?
C16 C15 N2 116.6(4) . . ?
C16 C15 C14 119.4(4) . . ?
C15 C14 H14 120.8 . . ?
C13 C14 C15 118.4(4) . . ?
C13 C14 H14 120.8 . . ?
C1 C2 F1 117.9(5) . . ?
C3 C2 F1 114.6(5) . . ?
C3 C2 C1 127.4(6) . . ?
N1 C17 H17 119.5 . . ?
N1 C17 C16 120.9(4) . . ?
C16 C17 H17 119.5 . . ?
C15 C16 C17 119.5(4) . . ?
C15 C16 H16 120.3 . . ?
C17 C16 H16 120.3 . . ?
C2 C1 B14 126.4(5) . . ?
C6 C1 C2 113.0(5) . . ?
C6 C1 B14 120.6(5) . . ?
N1 C13 C14 123.2(4) . . ?
N1 C13 H13 118.4 . . ?
C14 C13 H13 118.4 . . ?
C7 C12 H12 121.2 . . ?
C11 C12 H12 121.2 . . ?
C11 C12 C7 117.5(6) . . ?
O1 B14 O2 106.3(4) . . ?
O1 B14 N1 105.7(3) . . ?
O1 B14 C1 113.6(5) . . ?
O2 B14 N1 105.2(4) . . ?
O2 B14 C1 118.2(4) . . ?
C1 B14 N1 106.9(4) . . ?
O1 C7 C12 128.2(6) . . ?
O1 C7 C8 111.0(4) . . ?
C12 C7 C8 120.8(6) . . ?
O2 C8 C7 110.0(5) . . ?
C9 C8 O2 127.7(5) . . ?
C9 C8 C7 122.4(5) . . ?
C2 C3 H3 122.1 . . ?
C2 C3 C4 115.9(6) . . ?
C4 C3 H3 122.1 . . ?
C1 C6 H6 118.0 . . ?
C1 C6 C5 124.0(6) . . ?
C5 C6 H6 118.0 . . ?
C8 C9 H9 121.6 . . ?
C8 C9 C10 116.8(6) . . ?
C10 C9 H9 121.6 . . ?
C12 C11 H11 119.1 . . ?
C10 C11 C12 121.8(6) . . ?
C10 C11 H11 119.1 . . ?
C6 C5 H5 121.4 . . ?
C4 C5 C6 117.2(6) . . ?
C4 C5 H5 121.4 . . ?
C9 C10 H10 119.6 . . ?
C11 C10 C9 120.7(6) . . ?
C11 C10 H10 119.6 . . ?
C3 C4 C5 122.6(6) . . ?
F2 C4 C3 120.0(7) . . ?
F2 C4 C5 117.4(7) . . ?
C23 C22 H22 120.0 . . ?
C23 C22 C21 120.0 . . ?
C21 C22 H22 120.0 . . ?
C22 C23 H23 120.0 . . ?
C22 C23 C18 120.0 . . ?
C18 C23 H23 120.0 . . ?
C23 C18 H18 120.0 . . ?
C19 C18 C23 120.0 . . ?
C19 C18 H18 120.0 . . ?
C18 C19 H19 120.0 . . ?
C20 C19 C18 120.0 . . ?
C20 C19 H19 120.0 . . ?
C19 C20 H20 120.0 . . ?
C19 C20 C21 120.0 . . ?
C21 C20 H20 120.0 . . ?
C22 C21 H21 120.0 . . ?
C20 C21 C22 120.0 . . ?
C20 C21 H21 120.0 . . ?
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
N2 N2 1.230(6) 3_655 ?
N2 C15 1.438(5) . ?
F1 C2 1.388(5) . ?
O1 B14 1.459(6) . ?
O1 C7 1.357(6) . ?
O2 B14 1.466(6) . ?
O2 C8 1.376(5) . ?
N1 C17 1.335(5) . ?
N1 C13 1.341(5) . ?
N1 B14 1.664(6) . ?
C15 C14 1.376(6) . ?
C15 C16 1.365(6) . ?
C14 H14 0.9300 . ?
C14 C13 1.350(6) . ?
C2 C1 1.371(6) . ?
C2 C3 1.355(7) . ?
C17 H17 0.9300 . ?
C17 C16 1.382(6) . ?
C16 H16 0.9300 . ?
C1 B14 1.588(7) . ?
C1 C6 1.370(7) . ?
C13 H13 0.9300 . ?
C12 H12 0.9300 . ?
C12 C7 1.379(7) . ?
C12 C11 1.375(9) . ?
C7 C8 1.384(7) . ?
C8 C9 1.350(7) . ?
C3 H3 0.9300 . ?
C3 C4 1.359(8) . ?
F2 C4 1.358(6) . ?
C6 H6 0.9300 . ?
C6 C5 1.393(8) . ?
C9 H9 0.9300 . ?
C9 C10 1.417(7) . ?
C11 H11 0.9300 . ?
C11 C10 1.363(9) . ?
C5 H5 0.9300 . ?
C5 C4 1.366(8) . ?
C10 H10 0.9300 . ?
C22 H22 0.9300 . ?
C22 C23 1.3900 . ?
C22 C21 1.3900 . ?
C23 H23 0.9300 . ?
C23 C18 1.3900 . ?
C18 H18 0.9300 . ?
C18 C19 1.3900 . ?
C19 H19 0.9300 . ?
C19 C20 1.3900 . ?
C20 H20 0.9300 . ?
C20 C21 1.3900 . ?
C21 H21 0.9300 . ?
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
_geom_torsion_site_symmetry_1
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
_geom_torsion_publ_flag
N2 N2 C15 C14 17.1(7) 3_655 . . . ?
N2 N2 C15 C16 -163.8(5) 3_655 . . . ?
N2 C15 C14 C13 -179.5(5) . . . . ?
N2 C15 C16 C17 178.5(4) . . . . ?
F1 C2 C1 B14 -2.5(6) . . . . ?
F1 C2 C1 C6 174.9(4) . . . . ?
F1 C2 C3 C4 -175.1(4) . . . . ?
O1 C7 C8 O2 0.0(5) . . . . ?
O1 C7 C8 C9 -179.1(4) . . . . ?
O2 C8 C9 C10 -179.7(4) . . . . ?
N1 C17 C16 C15 1.5(8) . . . . ?
C15 C14 C13 N1 0.4(8) . . . . ?
C14 C15 C16 C17 -2.3(8) . . . . ?
C2 C1 B14 O1 -155.8(4) . . . . ?
C2 C1 B14 O2 -30.2(6) . . . . ?
C2 C1 B14 N1 88.0(5) . . . . ?
C2 C1 C6 C5 0.2(7) . . . . ?
C2 C3 C4 F2 -180.0(4) . . . . ?
C2 C3 C4 C5 0.0(8) . . . . ?
C17 N1 C13 C14 -1.3(8) . . . . ?
C17 N1 B14 O1 -8.5(6) . . . . ?
C17 N1 B14 O2 -120.7(4) . . . . ?
C17 N1 B14 C1 112.8(5) . . . . ?
C16 C15 C14 C13 1.4(7) . . . . ?
C1 C2 C3 C4 0.8(8) . . . . ?
C1 C6 C5 C4 0.5(8) . . . . ?
C13 N1 C17 C16 0.3(7) . . . . ?
C13 N1 B14 O1 173.2(4) . . . . ?
C13 N1 B14 O2 60.9(5) . . . . ?
C13 N1 B14 C1 -65.5(6) . . . . ?
C12 C7 C8 O2 179.4(4) . . . . ?
C12 C7 C8 C9 0.2(7) . . . . ?
C12 C11 C10 C9 1.1(8) . . . . ?
B14 O1 C7 C12 170.5(4) . . . . ?
B14 O1 C7 C8 -10.3(5) . . . . ?
B14 O2 C8 C7 10.2(4) . . . . ?
B14 O2 C8 C9 -170.8(5) . . . . ?
B14 N1 C17 C16 -178.1(5) . . . . ?
B14 N1 C13 C14 177.2(4) . . . . ?
B14 C1 C6 C5 177.7(5) . . . . ?
C7 O1 B14 O2 16.2(4) . . . . ?
C7 O1 B14 N1 -95.3(4) . . . . ?
C7 O1 B14 C1 147.8(4) . . . . ?
C7 C12 C11 C10 -1.6(8) . . . . ?
C7 C8 C9 C10 -0.8(7) . . . . ?
C8 O2 B14 O1 -16.1(4) . . . . ?
C8 O2 B14 N1 95.8(3) . . . . ?
C8 O2 B14 C1 -145.1(4) . . . . ?
C8 C9 C10 C11 0.1(7) . . . . ?
C3 C2 C1 B14 -178.2(5) . . . . ?
C3 C2 C1 C6 -0.9(7) . . . . ?
C6 C1 B14 O1 27.0(6) . . . . ?
C6 C1 B14 O2 152.6(4) . . . . ?
C6 C1 B14 N1 -89.2(5) . . . . ?
C6 C5 C4 C3 -0.6(9) . . . . ?
C6 C5 C4 F2 179.4(5) . . . . ?
C11 C12 C7 O1 -179.9(5) . . . . ?
C11 C12 C7 C8 0.9(7) . . . . ?
C22 C23 C18 C19 0.0 . . . . ?
C23 C22 C21 C20 0.0 . . . . ?
C23 C18 C19 C20 0.0 . . . . ?
C18 C19 C20 C21 0.0 . . . . ?
C19 C20 C21 C22 0.0 . . . . ?
C21 C22 C23 C18 0.0 . . . . ?
