Molecular interactions in crystalline dibromomethane and diiodomethane, and the stabilities of their high-pressure and low-temperature phases
Marcin Podsiad{λ}o; Kamil F. Dziubek; Marek Szafranski; Andrzej Katrusiak; Acta Crystallographica Section B 62 (2006) 1090–1098; doi:10.1107/S0108768106034963

data_2100677
_publ_contact_author_fax         +48(61)8658008
_publ_contact_author_phone       +48(61)8291443
_publ_section_title
;
 Molecular interactions in crystalline dibromomethane and
 diiodomethane, and the stabilities of their high-pressure and
 low-temperature phases
;
_journal_coeditor_code           BK5037
_journal_date_accepted           2006-08-30
_journal_date_recd_electronic    2006-05-24
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              1090
_journal_page_last               1098
_journal_paper_category          FA
_journal_paper_doi               10.1107/S0108768106034963
_journal_volume                  62
_journal_year                    2006
_chemical_formula_moiety         'C H2 I2'
_chemical_formula_sum            'C H2 I2'
_chemical_formula_weight         267.83
_chemical_melting_point          279
_chemical_name_common            'methylene iodide'
_chemical_name_systematic
;
Diiodomethane
;
_space_group_IT_number           42
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'F 2 -2'
_symmetry_space_group_name_H-M   'F m m 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3128(15)
_cell_length_b                   13.074(3)
_cell_length_c                   4.7465(9)
_cell_measurement_reflns_used    1073
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.19
_cell_measurement_theta_min      3.12
_cell_volume                     453.80(16)
_computing_cell_refinement       'CrysAlis (Oxford Diffraction, 2004)'
_computing_data_collection       'CrysAlis (Oxford Diffraction, 2004)'
_computing_data_reduction        'CrysAlis (Oxford Diffraction, 2004)'
_computing_molecular_graphics    'XP (Siemens, 1990)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.492
_diffrn_measured_fraction_theta_max 0.492
_diffrn_measurement_device_type  'Kuma KM4CCD \k geometry'
_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  0.0751
_diffrn_reflns_av_sigmaI/netI    0.0345
_diffrn_reflns_limit_h_max       3
_diffrn_reflns_limit_h_min       -3
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            1030
_diffrn_reflns_theta_full        29.19
_diffrn_reflns_theta_max         29.19
_diffrn_reflns_theta_min         3.12
_exptl_absorpt_coefficient_mu    13.638
_exptl_absorpt_correction_T_max  0.26
_exptl_absorpt_correction_T_min  0.11
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
Katrusiak, A. (2003). REDSHADE - Program for correcting
reflections intensities for DAC absorption, gasket shadowing
and sample crystal absorption. Adam Mickiewicz University, Pozna\'n.
Katrusiak, A. (2004). Z. Kristallogr. 219, 461-467
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    3.920
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylinder
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.43
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.439
_refine_diff_density_min         -0.538
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(7)
_refine_ls_extinction_coef       0.0123(14)
_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   1.334
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     14
_refine_ls_number_reflns         170
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.322
_refine_ls_R_factor_all          0.0279
_refine_ls_R_factor_gt           0.0264
_refine_ls_shift/su_max          0.015
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+16.8177P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0759
_refine_ls_wR_factor_ref         0.0764
_reflns_number_gt                162
_reflns_number_total             170
_reflns_threshold_expression     >4sigma(I)
_cod_data_source_file            bk5037.cif
_cod_data_source_block           1djm
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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 
;
_cod_original_cell_volume        453.82(16)
_cod_database_code               2100677
_cod_database_fobs_code          2100677