New binuclear double-stranded manganese helicates as catalysts for alkene epoxidation.
Sham, Kiu-Chor; Yeung, Ho-Lun; Yiu, Shek-Man; Lau, Tai-Chu; Kwong, Hoi-Lun; Dalton transactions (Cambridge, England : 2003) 39 (2010) 9469–9471; doi:10.1039/c0dt00953a

data_7026933
_publ_section_title
;
 New binuclear double-stranded manganese helicates as catalysts for alkene
 epoxidation.
;
_journal_issue                   40
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9469
_journal_page_last               9471
_journal_paper_doi               10.1039/c0dt00953a
_journal_volume                  39
_journal_year                    2010
_chemical_absolute_configuration rmad
_chemical_formula_sum            'C104 H103.5 Cl4 Mn2 N8 O21.75'
_chemical_formula_weight         2065.13
_chemical_name_systematic
;
?
;
_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
_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                   18.81287(15)
_cell_length_b                   22.75489(19)
_cell_length_c                   23.7655(2)
_cell_measurement_reflns_used    15520
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      71.3667
_cell_measurement_theta_min      3.5689
_cell_volume                     10173.65(15)
_computing_cell_refinement       'CrysAlisPro, Oxford Diffraction Ltd'
_computing_data_collection       'CrysAlisPro, Oxford Diffraction Ltd'
_computing_data_reduction        'CrysAlisPro, Oxford Diffraction Ltd'
_computing_molecular_graphics    ortep-3
_computing_publication_material  wingx
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.1270
_diffrn_measured_fraction_theta_full 0.968
_diffrn_measured_fraction_theta_max 0.968
_diffrn_measurement_device_type  'Xcalibur, Sapphire3, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.0335
_diffrn_reflns_av_sigmaI/netI    0.0482
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            31704
_diffrn_reflns_theta_full        66.99
_diffrn_reflns_theta_max         66.99
_diffrn_reflns_theta_min         3.57
_exptl_absorpt_coefficient_mu    3.600
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.34874
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlisPro, Oxford Diffraction Ltd'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.348
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4302
_exptl_crystal_size_max          0.53
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.767
_refine_diff_density_min         -0.800
_refine_diff_density_rms         0.065
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.009(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.011
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1265
_refine_ls_number_reflns         16631
_refine_ls_number_restraints     56
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.0796
_refine_ls_R_factor_gt           0.0612
_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^)+(0.1213P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1669
_refine_ls_wR_factor_ref         0.1799
_reflns_number_gt                12495
_reflns_number_total             16631
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00953a.txt
_cod_data_source_block           091609a
_cod_original_cell_volume        10173.64(16)
_cod_original_sg_symbol_H-M      P212121
_cod_original_formula_sum        'C104 H103.50 Cl4 Mn2 N8 O21.75'
_cod_database_code               7026933