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_1512630
_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            'C8 H11 N Se2'
_chemical_formula_weight         279.10
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 100.286(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.1417(5)
_cell_length_b                   21.6308(14)
_cell_length_c                   5.6145(3)
_cell_measurement_temperature    150(2)
_cell_volume                     972.89(10)
_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 0.969
_diffrn_measured_fraction_theta_max 0.969
_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  0.0390
_diffrn_reflns_av_sigmaI/netI    0.0397
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            7470
_diffrn_reflns_theta_full        25.73
_diffrn_reflns_theta_max         25.73
_diffrn_reflns_theta_min         2.54
_diffrn_standards_interval_count 0.5
_diffrn_standards_interval_time  10
_exptl_absorpt_coefficient_mu    7.540
_exptl_absorpt_correction_T_max  0.5193
_exptl_absorpt_correction_T_min  0.1524
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.905
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             536
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.644
_refine_diff_density_min         -1.073
_refine_diff_density_rms         0.277
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.093
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     103
_refine_ls_number_reflns         1839
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.093
_refine_ls_R_factor_all          0.0520
_refine_ls_R_factor_gt           0.0463
_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^)+(0.1008P)^2^+1.1445P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1437
_refine_ls_wR_factor_ref         0.1479
_reflns_number_gt                1636
_reflns_number_total             1839
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ICA-2012-392-335-344-3.cif
_cod_data_source_block           compound_7c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.1008P)^2^+1.1445P] 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^)+(0.1008P)^2^+1.1445P] 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      P21/c
_cod_database_code               1512630