Synthesis of cyclic gem-dinitro compounds via radical nitration of 1,6-diynes with Fe(NO<sub>3</sub>)<sub>3</sub>·9H<sub>2</sub>O.
Yi, Xiaofei; Chen, Kai; Chen, Wei; Chen, Wanzhi; Liu, Miaochang; Wu, Huayue; Organic & biomolecular chemistry 17 (2019) 4725–4728; doi:10.1039/c9ob00431a

data_7156799
_publ_section_title
;
 Synthesis of cyclic gem-dinitro compounds via radical nitration of
 1,6-diynes with Fe(NO<sub>3</sub>)<sub>3</sub>&#x00B7;9H<sub>2</sub>O.
;
_journal_issue                   19
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              4725
_journal_page_last               4728
_journal_paper_doi               10.1039/c9ob00431a
_journal_volume                  17
_journal_year                    2019
_chemical_formula_sum            'C21 H20 N4 O9 S'
_chemical_formula_weight         504.47
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2019-01-28 deposited with the CCDC.    2019-04-23 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 114.957(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.1433(7)
_cell_length_b                   9.7950(4)
_cell_length_c                   16.3549(7)
_cell_measurement_reflns_used    2674
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.2265
_cell_measurement_theta_min      3.6275
_cell_volume                     2344.62(18)
_computing_cell_refinement       'Bruker FRAMBO'
_computing_data_collection       'Bruker FRAMBO'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_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  0.0470
_diffrn_reflns_av_sigmaI/netI    0.0528
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            14081
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         2.49
_exptl_absorpt_coefficient_mu    0.197
_exptl_absorpt_correction_T_max  0.9691
_exptl_absorpt_correction_T_min  0.9505
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.429
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1048
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.597
_refine_diff_density_min         -0.627
_refine_diff_density_rms         0.083
_refine_ls_extinction_coef       0.009(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.101
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     320
_refine_ls_number_reflns         4094
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.101
_refine_ls_R_factor_all          0.1113
_refine_ls_R_factor_gt           0.0805
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1360P)^2^+1.8498P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2259
_refine_ls_wR_factor_ref         0.2554
_reflns_number_gt                2634
_reflns_number_total             4094
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c9ob00431a2.cif
_cod_data_source_block           190117_yxf181225_1_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7156797--7156799.cif.
;
_cod_original_cell_volume        2344.62(17)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7156799