High-pressure crystal structure of methyl iodide: molecular aggregation in the crystals of halomethanes and their isostructural relations,
Podsiadło, Marcin; Katrusiak, Andrzej; CrystEngComm 11 (2009) 1951–; doi:10.1039/b903526e

data_7201034
_publ_section_title
;
 High-pressure crystal structure of methyl iodide: molecular
 aggregation in the crystals of halomethanes and their isostructural
 relations,
;
_journal_issue                   9
_journal_name_full               CrystEngComm
_journal_page_first              1951
_journal_paper_doi               10.1039/b903526e
_journal_volume                  11
_journal_year                    2009
_chemical_formula_moiety         'C1 H3 I1'
_chemical_formula_sum            'C H3 I'
_chemical_formula_weight         141.93
_chemical_melting_point          209
_chemical_name_common            iodomethane
_chemical_name_systematic
;
iodomethane
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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                   4.2676(10)
_cell_length_b                   6.572(10)
_cell_length_c                   9.611(6)
_cell_measurement_reflns_used    1217
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      28.29
_cell_measurement_theta_min      4.24
_cell_volume                     269.6(4)
_computing_cell_refinement       'CrysAlisRED (Oxford Diffraction, 2004)'
_computing_data_collection       'CrysAlisCCD (Oxford Diffraction, 2004)'
_computing_data_reduction
'CrysAlisRED (Oxford Diffraction, 2004); REDSHABS (Katrusiak, A. 2003)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1990)'
_computing_publication_material  'SHELXL--97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL--97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS--97 (Sheldrick, 1997)'
_diffrn_ambient_environment      'diamond-anvil cell'
_diffrn_ambient_pressure         2530000
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.259
_diffrn_measured_fraction_theta_max 0.259
_diffrn_measurement_device_type  'KM-4 CCD'
_diffrn_measurement_method       '\f- and \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  0.1830
_diffrn_reflns_av_sigmaI/netI    0.0474
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       2
_diffrn_reflns_limit_k_min       -2
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            1217
_diffrn_reflns_theta_full        28.29
_diffrn_reflns_theta_max         28.29
_diffrn_reflns_theta_min         4.24
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    11.492
_exptl_absorpt_correction_T_max  0.39
_exptl_absorpt_correction_T_min  0.28
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
Correction for absorption of the diamond-anvil cell and the sample
were made using program REDSHABS (Katrusiak, A. (2003) REDSHABS. Adam
Mickiewicz University Pozna\'n; Katrusiak, A. (2004) Z. Kristallogr.
219, 461-467).
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    3.498
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylinder
_exptl_crystal_F_000             248
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.491
_refine_diff_density_min         -0.476
_refine_diff_density_rms         0.132
_refine_ls_extinction_coef       0.012(5)
_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   1.131
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     12
_refine_ls_number_reflns         94
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.131
_refine_ls_R_factor_all          0.0435
_refine_ls_R_factor_gt           0.0418
_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^)+(0.0373P)^2^+1.9485P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0827
_refine_ls_wR_factor_ref         0.0857
_reflns_number_gt                89
_reflns_number_total             94
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b903526e.txt
_cod_data_source_block           3jm_met_2.53GPa
_cod_original_cell_volume        269.5(4)
_cod_database_code               7201034