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_7241615
_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 H7 O3 S, C7 H7 O, H2 O'
_chemical_formula_sum            'C17 H16 O5 S'
_chemical_formula_weight         332.36
_chemical_name_systematic        tropone
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_date             2020-09-04
_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                90
_cell_angle_beta                 98.666(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.7177(11)
_cell_length_b                   16.233(3)
_cell_length_c                   14.530(3)
_cell_measurement_reflns_used    2271
_cell_measurement_temperature    170
_cell_measurement_theta_max      25.494
_cell_measurement_theta_min      2.510
_cell_volume                     1566.4(5)
_computing_cell_refinement       'SAINT V8.40A (?, 2016)'
_computing_data_reduction        'SAINT V8.40A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      170
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0805
_diffrn_reflns_av_unetI/netI     0.1049
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            6222
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.388
_diffrn_reflns_theta_min         1.893
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.230
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6754
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 TWINABS-2012/1 (Bruker,2012) was used for absorption correction.

Final HKLF 4 output contains 18039 reflections, Rint = 0.0730
 (7203 with I > 3sig(I), Rint = 0.0566)
;
_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    1.409
_exptl_crystal_description       needle
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.381
_refine_diff_density_min         -0.385
_refine_diff_density_rms         0.073
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3216
_refine_ls_number_restraints     18
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.1204
_refine_ls_R_factor_gt           0.0688
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0335P)^2^+1.9247P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1283
_refine_ls_wR_factor_ref         0.1490
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2025
_reflns_number_total             3216
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0ce01551b2.cif
_cod_data_source_block           mo_22020146_0m_4
_cod_depositor_comments
'Adding full bibliography for 7241604--7241616.cif.'
_cod_database_code               7241615
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.977
_shelx_estimated_absorpt_t_min   0.955
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All O(H) groups, All O(H,H) groups
2. Uiso/Uaniso restraints and constraints
Uanis(O4A) \\sim Ueq, Uanis(O3A) \\sim Ueq, Uanis(O2A) \\sim Ueq: with sigma of
0.005 and sigma for terminal atoms of 0.01
Uanis(O4A) \\sim Ueq: with sigma of 0.001 and sigma for terminal atoms of 0.002
3. Others
 Fixed Sof: O3(0.88) O4(0.88) O2(0.88) O4A(0.12) O2A(0.12) O3A(0.12)
4.a Free rotating group:
 O5(H5A,H5B)
4.b Aromatic/amide H refined with riding coordinates:
 C8(H8), C10(H10), C11(H11), C2(H2), C13(H13), C14(H14), C16(H16), C15(H15),
 C3(H3), C7(H7), C4(H4), C6(H6), C5(H5)
4.c Idealised tetrahedral OH refined as rotating group:
 O1(H1)
;
_olex2_submission_special_instructions 'No special instructions were received'