Energetic materials: variable-temperature crystal structures of two biguanidinium dinitramides
Bolotina, Nadezhda B.; Hardie, Michaele J.; Pinkerton, A. Alan; Journal of Applied Crystallography 36 (2003) 1334–1341; doi:10.1107/S0021889803016182

data_2300018
_publ_section_title
;
 Energetic materials: variable-temperature crystal structures of two
 biguanidinium dinitramides
;
_journal_issue                   6
_journal_name_full               'Journal of Applied Crystallography'
_journal_page_first              1334
_journal_page_last               1341
_journal_paper_doi               10.1107/S0021889803016182
_journal_volume                  36
_journal_year                    2003
_chemical_formula_sum            'C2 H9 N11 O8'
_chemical_formula_weight         315.20
_chemical_name_common            'biguanidinium bis-dinitramide'
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 116.2250(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.8391(9)
_cell_length_b                   8.1392(6)
_cell_length_c                   13.0265(10)
_cell_measurement_reflns_used    2518
_cell_measurement_temperature    250.0(10)
_cell_measurement_theta_max      23.30
_cell_measurement_theta_min      3.99
_cell_volume                     1126.04(15)
_computing_cell_refinement       'Siemens SAINT, 1996b'
_computing_data_collection       'Siemens SMART, 1996a'
_computing_data_reduction        'Siemens SAINT, 1996b'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  'SHELXTL and the Toledo cifomatic'
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      250.0(10)
_diffrn_measurement_device       Platform
_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  0.0327
_diffrn_reflns_av_sigmaI/netI    0.0370
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            3810
_diffrn_reflns_theta_max         28.31
_diffrn_reflns_theta_min         3.15
_exptl_absorpt_coefficient_mu    0.179
_exptl_absorpt_correction_T_max  0.990313
_exptl_absorpt_correction_T_min  0.624536
_exptl_absorpt_correction_type   'Empirical :Multipole Expansion'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.859
_exptl_crystal_density_method    '?                 '
_exptl_crystal_description       block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.317
_refine_diff_density_min         -0.318
_refine_ls_extinction_coef       0.0052(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXTL
_refine_ls_goodness_of_fit_all   1.067
_refine_ls_goodness_of_fit_obs   1.117
_refine_ls_matrix_type           full
_refine_ls_number_parameters     115
_refine_ls_number_reflns         1402
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.071
_refine_ls_restrained_S_obs      1.122
_refine_ls_R_factor_all          0.0582
_refine_ls_R_factor_obs          0.0456
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0853P)^2^+0.3144P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1384
_refine_ls_wR_factor_obs         0.1287
_reflns_number_observed          1128
_reflns_number_total             1402
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            do0021.cif
_cod_data_source_block           II250K
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0853P)^2^+0.3144P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0853P)^2^+0.3144P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2300018