5,6-Di(2-fluoro-2,2-dinitroethoxy)furazano[3,4-b]pyrazine: a high performance melt-cast energetic material and its polycrystalline properties
Ma, Qing; Lu, Zhipeng; Liao, Longyu; Huang, Jinglun; Liu, Dabin; Li, Jinshan; Fan, Guijuan; RSC Adv. 7 (2017) 38844–; doi:10.1039/C7RA07035G

data_7228897
_publ_section_title
;
 5,6-Di(2-fluoro-2,2-dinitroethoxy)furazano[3,4-b]pyrazine: a high
 performance melt-cast energetic material and its polycrystalline
 properties
;
_journal_issue                   62
_journal_name_full               'RSC Adv.'
_journal_page_first              38844
_journal_paper_doi               10.1039/C7RA07035G
_journal_volume                  7
_journal_year                    2017
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C8 H4 F2 N8 O11'
_chemical_formula_sum            'C8 H4 F2 N8 O11'
_chemical_formula_weight         426.19
_space_group_crystal_system      orthorhombic
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2017-01-09
_audit_creation_method
;
Olex2 1.2
(compiled 2016.11.30 svn.r3356 for OlexSys, GUI svn.r5269)
;
_audit_update_record
;
2017-02-28 deposited with the CCDC.
2017-08-09 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.9222(18)
_cell_length_b                   13.057(2)
_cell_length_c                   10.5202(17)
_cell_measurement_reflns_used    6238
_cell_measurement_temperature    130
_cell_measurement_theta_max      30.54
_cell_measurement_theta_min      2.43
_cell_volume                     1500.3(4)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_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      130
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0288
_diffrn_reflns_av_unetI/netI     0.0320
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            14547
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.981
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.584
_diffrn_reflns_theta_min         1.560
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.190
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.5446
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
wR2(int) was 0.0790 before and 0.0431 after correction.
The Ratio of minimum to maximum transmission is 0.7299.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.887
_exptl_crystal_description       plate
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.371
_refine_diff_density_min         -0.267
_refine_diff_density_rms         0.051
_refine_ls_abs_structure_details
;
 Flack x determined using 1702 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.3(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         4524
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0383
_refine_ls_R_factor_gt           0.0322
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0454P)^2^+0.1276P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0795
_refine_ls_wR_factor_ref         0.0828
_reflns_Friedel_coverage         0.869
_reflns_Friedel_fraction_full    0.993
_reflns_Friedel_fraction_max     0.962
_reflns_number_gt                4081
_reflns_number_total             4524
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ra07035g2.cif
_cod_data_source_block           dm17022
_cod_database_code               7228897
_shelx_estimated_absorpt_t_max   0.996
_shelx_estimated_absorpt_t_min   0.967
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C5(H5A,H5B), C7(H7A,H7B)
;
_shelx_res_checksum              12168
_shelx_shelxl_version_number     2016/6
_olex2_submission_special_instructions 'No special instructions were received'