Stabilizing photo-sensitive colchicine through rebalancing electron distribution of the reactive tropolone ring
Ma, Xiaoyu; Zhu, Bingqing; Yang, Zeen; Jiang, Yuhang; Mei, Xuefeng; CrystEngComm 23 (2021) 30–34; doi:10.1039/D0CE01551B

data_7241611
_publ_section_title
;
 Stabilizing photo-sensitive colchicine through rebalancing electron
 distribution of the reactive tropolone ring
;
_journal_issue                   1
_journal_name_full               CrystEngComm
_journal_page_first              30
_journal_page_last               34
_journal_paper_doi               10.1039/D0CE01551B
_journal_volume                  23
_journal_year                    2021
_chemical_formula_moiety         'C10 H6 O6 S2, 2(C7 H7 O2)'
_chemical_formula_sum            'C24 H20 O10 S2'
_chemical_formula_weight         532.52
_chemical_name_systematic        tropolone
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2020-04-13
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2020-09-04 deposited with the CCDC.	2020-11-23 downloaded from the CCDC.
;
_cell_angle_alpha                102.6500(10)
_cell_angle_beta                 104.1720(10)
_cell_angle_gamma                90.5980(10)
_cell_formula_units_Z            1
_cell_length_a                   7.0583(2)
_cell_length_b                   8.1581(3)
_cell_length_c                   10.0680(3)
_cell_measurement_reflns_used    4663
_cell_measurement_temperature    150
_cell_measurement_theta_max      27.505
_cell_measurement_theta_min      2.943
_cell_volume                     547.19(3)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_reduction        'SAINT V8.38A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      150.0
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'D8 ADVENTURE'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0194
_diffrn_reflns_av_unetI/netI     0.0231
_diffrn_reflns_Laue_measured_fraction_full 0.979
_diffrn_reflns_Laue_measured_fraction_max 0.974
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            6645
_diffrn_reflns_point_group_measured_fraction_full 0.979
_diffrn_reflns_point_group_measured_fraction_max 0.974
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.505
_diffrn_reflns_theta_min         2.943
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.307
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6979
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1249 before and 0.0554 after correction. The Ratio of minimum to maximum transmission is 0.9360. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.616
_exptl_crystal_description       block
_exptl_crystal_F_000             276
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.351
_refine_diff_density_min         -0.466
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     165
_refine_ls_number_reflns         2440
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0371
_refine_ls_R_factor_gt           0.0330
_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/[\s^2^(Fo^2^)+(0.0291P)^2^+0.3747P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0782
_refine_ls_wR_factor_ref         0.0815
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2233
_reflns_number_total             2440
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0ce01551b2.cif
_cod_data_source_block           22019971_0m
_cod_depositor_comments
'Adding full bibliography for 7241604--7241616.cif.'
_cod_database_code               7241611
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.970
_shelx_estimated_absorpt_t_min   0.970
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All O(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C9(H9), C10(H10), C11(H11), C3(H3), C7(H7), C5(H5), C4(H4), C6(H6)
2.b Idealised tetrahedral OH refined as rotating group:
 O1(H1), O2(H2)
;
_olex2_submission_special_instructions 'No special instructions were received'