s-Block chalcogenoether chemistry–thio- and selenoether coordination with hard Group 2 ions.
Farina, Paolo; Levason, William; Reid, Gillian; Dalton transactions (Cambridge, England : 2003) 42 (2013) 89–99; doi:10.1039/c2dt31692g

data_7020686
_publ_section_title
;
 s-Block chalcogenoether chemistry--thio- and selenoether coordination
 with hard Group 2 ions.
;
_journal_issue                   1
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              89
_journal_page_last               99
_journal_paper_doi               10.1039/c2dt31692g
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'C12 H24 O4 Se2'
_chemical_formula_sum            'C12 H24 O4 Se2'
_chemical_formula_weight         390.23
_chemical_name_common            1,4,10,13-tetraoxa-7,16-diselenacyclooctadecane
_chemical_name_systematic
;
1,4,10,13-tetraoxa-7,16-diselenacyclooctadecane
;
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2012-05-10
_audit_creation_method           'SHELXL-97 + hand edit'
_cell_angle_alpha                90.00
_cell_angle_beta                 102.489(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.933(4)
_cell_length_b                   13.419(7)
_cell_length_c                   8.573(4)
_cell_measurement_reflns_used    5186
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.0
_cell_volume                     778.7(7)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r7 (Rigaku, 2011)'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r7 (Rigaku, 2011)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r7 (Rigaku, 2011)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_type            'Rigaku HG Saturn724+ (2x2 bin mode)'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'Four-circle \k diffractometer'
_diffrn_measurement_device_type  'Rigaku AFC12 '
_diffrn_measurement_method       'Profile data from \w-scans'
_diffrn_radiation_collimation    'Confocal mirrors, HF VariMax '
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1176
_diffrn_reflns_av_sigmaI/netI    0.1786
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            7115
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.04
_diffrn_source                   'Rotating anode X-ray tube'
_diffrn_source_type              'Rigaku FR-E+ SuperBright'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.752
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.637
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Jacobson, R.A. (1998). REQAB. Private communication to the
Rigaku Corporation, Tokyo, Japan.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.664
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.577
_refine_diff_density_min         -0.495
_refine_diff_density_rms         0.108
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.652
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     82
_refine_ls_number_reflns         1775
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.652
_refine_ls_R_factor_all          0.0838
_refine_ls_R_factor_gt           0.0349
_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^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0550
_refine_ls_wR_factor_ref         0.0594
_reflns_number_gt                1020
_reflns_number_total             1775
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            c2dt31692g.txt
_cod_data_source_block           12paf072ka
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7020686