1,1'-Di(hydrazinocarbonylmethyl)-2,2'-biimidazole monohydrate and 1,1'-di[2-(hydrazinocarbonyl)ethyl]-2,2'-biimidazole
Barnett, W. Mark; Baughman, Russell G.; Secondo, Paula M.; Hermansen, Charles J.; Acta Crystallographica Section C 58 (2002) o565–o567; doi:10.1107/S0108270102013458

data_2012951
_publ_section_title
;
 1,1'-Di(hydrazinocarbonylmethyl)-2,2'-biimidazole monohydrate and
 1,1'-di[2-(hydrazinocarbonyl)ethyl]-2,2'-biimidazole
;
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o565
_journal_page_last               o567
_journal_paper_doi               10.1107/S0108270102013458
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C12 H18 N8 O2'
_chemical_formula_moiety         'C12 H18 N8 O2'
_chemical_formula_sum            'C12 H18 N8 O2'
_chemical_formula_weight         306.33
_chemical_name_systematic
;
 1,1'-di(hydrazinopropanoyl)-2,2'-biimidazole
;
_space_group_IT_number           14
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 106.904(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.0505(5)
_cell_length_b                   4.9326(2)
_cell_length_c                   15.4663(7)
_cell_measurement_reflns_used    100
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      19.65
_cell_measurement_theta_min      7.72
_cell_volume                     733.61(6)
_computing_cell_refinement       'P3/P4-PC Diffractometer Program'
_computing_data_collection
'P3/P4-PC Diffractometer Program (Siemens, 1991)'
_computing_data_reduction        'XDISK (Siemens, 1991)'
_computing_molecular_graphics    'SHELXTL/PC (Sheldrick, 1990b)'
_computing_publication_material  'SHELXTL/PC and SHELXL93'
_computing_structure_refinement  'SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS86 (Sheldrick, 1990a)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.99
_diffrn_measured_fraction_theta_max 0.99
_diffrn_measurement_device       'Siemens--Bruker P4'
_diffrn_measurement_method       \q/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0257
_diffrn_reflns_av_sigmaI/netI    0.0272
_diffrn_reflns_limit_h_max       1
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            1899
_diffrn_reflns_theta_full        25.0
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.12
_diffrn_standards_decay_%        'ave. of 1.7 % in \s(I)s'
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.101
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.387
_exptl_crystal_density_meas      ?
_exptl_crystal_description       'rectangular block'
_exptl_crystal_F_000             324
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.176
_refine_diff_density_min         -0.193
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.045
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     100
_refine_ls_number_reflns         1283
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.054
_refine_ls_restrained_S_obs      1.084
_refine_ls_R_factor_all          0.0495
_refine_ls_R_factor_gt           0.0399
_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^)+(0.0496P)^2^+0.2482P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1080
_refine_ls_wR_factor_ref         0.1009
_reflns_number_gt                1078
_reflns_number_total             1287
_reflns_threshold_expression     'I > 2 \s(I)'
_cod_data_source_file            sk1568.cif
_cod_data_source_block           II
_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:

'_exptl_crystal_density_meas' value 'not determined' was changed to
'?' - the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2012951
_cod_database_fobs_code          2012951