A new approach to superior optical limiting materials—planar ‘open’ heterothiometallic clusters
Zhang, Chi; Song, Yinglin; Fung, B. M.; Xin, Xinquan; Xue, Ziling; Chemical Communications  (2001) 843–; doi:10.1039/b100395j

data_7115081
_publ_section_title
;
 A new approach to superior optical limiting materials---planar
 &#x2018;open&#x2019; heterothiometallic clusters
;
_journal_issue                   9
_journal_name_full               'Chemical Communications'
_journal_page_first              843
_journal_paper_doi               10.1039/b100395j
_journal_year                    2001
_chemical_formula_sum            'C30 H30 Br2 Cu4 N6 S4 W'
_chemical_formula_weight         1200.67
_chemical_name_systematic
; 
? 
;
_space_group_IT_number           43
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'F 2 -2d'
_symmetry_space_group_name_H-M   'F d d 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            16
_cell_length_a                   22.58970(10)
_cell_length_b                   22.8053(3)
_cell_length_c                   30.1995(3)
_cell_measurement_reflns_used    6421
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.35
_cell_measurement_theta_min      1.44
_cell_volume                     15557.7(3)
_computing_cell_refinement       'SAINT (Siemens, 1996)'
_computing_data_collection       'SMART (Siemens, 1996)'
_computing_data_reduction        'SAINT (Siemens, 1996)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997)'
_computing_publication_material
; SHELXTL (Sheldrick, 1997)
PARST (Nardelli, 1983)
;
_computing_structure_refinement  'SHELXTL (Sheldrick, 1997)'
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device
;
Siemens SMART CCD area detector diffractometer 
;
_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  0.0593
_diffrn_reflns_av_sigmaI/netI    0.0653
_diffrn_reflns_limit_h_max       30
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       40
_diffrn_reflns_limit_l_min       -40
_diffrn_reflns_number            26507
_diffrn_reflns_theta_full        28.27
_diffrn_reflns_theta_max         28.27
_diffrn_reflns_theta_min         1.44
_exptl_absorpt_coefficient_mu    7.397
_exptl_absorpt_correction_T_max  0.2698
_exptl_absorpt_correction_T_min  0.1137
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            'dark red'
_exptl_crystal_density_diffrn    2.050
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             9216
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.911
_refine_diff_density_min         -0.662
_refine_diff_density_rms         0.099
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00
_refine_ls_extinction_coef       0.000051(4)
_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   1.008
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     426
_refine_ls_number_reflns         9516
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.0747
_refine_ls_R_factor_gt           0.0432
_refine_ls_shift/su_max          0.074
_refine_ls_shift/su_mean         0.009
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0431P)^2^+40.3481P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0977
_refine_ls_wR_factor_ref         0.1114
_reflns_number_gt                6696
_reflns_number_total             9516
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b100395j.txt
_cod_data_source_block           3
_cod_database_code               7115081