Synthesis, characterization and X-ray structure of 3,4-lutidinyl-, 3-/4-picolyl- and pyridylselenium compounds
Jaspreet S. Dhau; Amritpal Singh; Avtar Singh; Balwinder S. Sooch; Paula Brandao; Vitor Felix; Inorganica Chimica Acta 392 (2012) 335–344; doi:10.1016/j.ica.2012.03.043

data_1512631
_publ_section_title
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 Synthesis, characterization and X-ray structure of 3,4-lutidinyl-,
 3-/4-picolyl- and pyridylselenium compounds
;
_journal_name_full
;
Inorganica Chimica Acta
;
_journal_page_first              335
_journal_page_last               344
_journal_paper_doi               10.1016/j.ica.2012.03.043
_journal_volume                  392
_journal_year                    2012
_chemical_formula_sum            'C7 H9 N Se2'
_chemical_formula_weight         265.07
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.321(3)
_cell_length_b                   5.3769(17)
_cell_length_c                   15.617(4)
_cell_measurement_temperature    150(2)
_cell_volume                     866.7(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'PLATON (Spek, 2008)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  CCD
_diffrn_measurement_method       'omega and phi 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  0.0313
_diffrn_reflns_av_sigmaI/netI    0.0253
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            10286
_diffrn_reflns_theta_full        29.26
_diffrn_reflns_theta_max         29.26
_diffrn_reflns_theta_min         2.37
_diffrn_standards_interval_count 0.5
_diffrn_standards_interval_time  15
_exptl_absorpt_coefficient_mu    8.458
_exptl_absorpt_correction_T_max  0.5510
_exptl_absorpt_correction_T_min  0.1858
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.031
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.617
_refine_diff_density_min         -0.451
_refine_diff_density_rms         0.071
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.00(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     94
_refine_ls_number_reflns         2360
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0243
_refine_ls_R_factor_gt           0.0213
_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^)+(0.0212P)^2^+0.4357P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0480
_refine_ls_wR_factor_ref         0.0487
_reflns_number_gt                2201
_reflns_number_total             2360
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ICA-2012-392-335-344-4.cif
_cod_data_source_block           compound_7d
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0212P)^2^+0.4357P] 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^)+(0.0212P)^2^+0.4357P] 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      P212121
_cod_database_code               1512631