Dimethylcalcium.
Wolf, Benjamin M.; Stuhl, Christoph; Maichle-Mössmer, Cäcilia; Anwander, Reiner; Journal of the American Chemical Society 140 (2018) 2373–2383; doi:10.1021/jacs.7b12984

data_4131914
_publ_section_title
;
 Dimethylcalcium.
;
_journal_issue                   6
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2373
_journal_page_last               2383
_journal_paper_doi               10.1021/jacs.7b12984
_journal_volume                  140
_journal_year                    2018
_chemical_formula_sum            'C29.92 H64.75 Ca3 I1.08 O5'
_chemical_formula_weight         762.37
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 93.383(16)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.223(9)
_cell_length_b                   17.635(14)
_cell_length_c                   18.194(15)
_cell_measurement_reflns_used    241
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.04
_cell_measurement_theta_min      2.253
_cell_volume                     3915(5)
_computing_cell_refinement       'SAINT V8.37A (Bruker AXS Inc., 2015)'
_computing_data_collection       'APEX3 v2016.5-0 (Bruker AXS)'
_computing_data_reduction        'SAINT V8.37A (Bruker AXS Inc., 2015)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution
'XT, VERSION 2014/5,SHELXS-13 (Sheldrick 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX II DUO'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0531
_diffrn_reflns_av_unetI/netI     0.0299
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            70242
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.103
_diffrn_reflns_theta_min         1.609
_diffrn_source                   'ImuS-focus sealed tube'
_exptl_absorpt_coefficient_mu    1.307
_exptl_absorpt_correction_T_max  0.7458
_exptl_absorpt_correction_T_min  0.7080
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.293
_exptl_crystal_description       block
_exptl_crystal_F_000             1607
_exptl_crystal_size_max          0.156
_exptl_crystal_size_mid          0.135
_exptl_crystal_size_min          0.120
_refine_diff_density_max         1.923
_refine_diff_density_min         -1.023
_refine_diff_density_rms         0.080
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     436
_refine_ls_number_reflns         8642
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0560
_refine_ls_R_factor_gt           0.0362
_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^)+(0.0418P)^2^+3.9412P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0844
_refine_ls_wR_factor_ref         0.0945
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6686
_reflns_number_total             8642
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b12984_si_002.cif
_cod_data_source_block           3b_mo_BW370a_0mmulti
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4131914
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.822
_shelx_estimated_absorpt_t_max   0.859
_shelx_res_checksum              25386
_shelx_hkl_checksum              69417