Revisiting the structure and properties of mid-valent monopentamethylcyclopentadienylchromium complexes.
Calvo-Molina, Adrián; Jover, Jesús; Pérez-Redondo, Adrián; Yélamos, Carlos; Dalton transactions (Cambridge, England : 2003) 54 (2025) 8190–8203; doi:10.1039/d5dt00620a

data_7718456
_publ_section_title
;
 Revisiting the structure and properties of mid-valent
 monopentamethylcyclopentadienylchromium complexes.
;
_journal_issue                   20
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              8190
_journal_page_last               8203
_journal_paper_doi               10.1039/d5dt00620a
_journal_volume                  54
_journal_year                    2025
_chemical_formula_moiety         'C40 H64 Cr4'
_chemical_formula_sum            'C40 H64 Cr4'
_chemical_formula_weight         752.91
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   dual
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4.5
_audit_creation_date             2024-07-05T10:24:37-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2025-01-21 deposited with the CCDC.	2025-03-31 downloaded from the CCDC.
;
_cell_angle_alpha                83.350(2)
_cell_angle_beta                 82.634(2)
_cell_angle_gamma                67.661(2)
_cell_formula_units_Z            2
_cell_length_a                   10.6445(6)
_cell_length_b                   10.8469(6)
_cell_length_c                   17.7916(10)
_cell_measurement_reflns_used    9825
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.51
_cell_measurement_theta_min      2.41
_cell_measurement_wavelength     0.71073
_cell_volume                     1879.32(18)
_computing_cell_refinement       'SAINT V8.40B integration software'
_computing_data_collection       'Apex3 v2019.11-0 (Bruker, 2019)'
_computing_data_reduction        'SAINT V8.40B (Bruker, 2019)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 2012)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT-2018/2 (Sheldrick, 2015)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector                 'APEX-II CCD'
_diffrn_detector_area_resol_mean 7.4074
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type
;
Bruker AXS D8 Venture diffractometer with PhotonIII_C14 charge-integrating and 
photon counting pixel array detector
;
_diffrn_measurement_method       'omega and phi scans'
_diffrn_orient_matrix_UB_11      0.047043
_diffrn_orient_matrix_UB_12      -0.093553
_diffrn_orient_matrix_UB_13      0.021521
_diffrn_orient_matrix_UB_21      -0.060364
_diffrn_orient_matrix_UB_22      0.021106
_diffrn_orient_matrix_UB_23      0.048444
_diffrn_orient_matrix_UB_31      -0.067428
_diffrn_orient_matrix_UB_32      -0.028113
_diffrn_orient_matrix_UB_33      -0.020476
_diffrn_radiation_collimation    'focusing mirrors'
_diffrn_radiation_monochromator  'multilayer mirror optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0421
_diffrn_reflns_av_unetI/netI     0.0225
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            77282
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         27.559
_diffrn_reflns_theta_min         2.035
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_current           1.4
_diffrn_source_type              'INCOATEC I\ms 3.0'
_diffrn_source_voltage           50
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.151
_exptl_absorpt_correction_T_max  0.746
_exptl_absorpt_correction_T_min  0.702
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
        SADABS-2016/2 - Bruker AXS area detector scaling and absorption correcti
;
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.331
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             800
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: benzene-d6'
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.877
_refine_diff_density_min         -1.71
_refine_diff_density_rms         0.323
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.29
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     431
_refine_ls_number_reflns         8644
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.29
_refine_ls_R_factor_all          0.0699
_refine_ls_R_factor_gt           0.0585
_refine_ls_shift/su_max          0.017
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0748P)^2^+5.0234P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1669
_refine_ls_wR_factor_ref         0.1865
_reflns_Friedel_coverage         0
_reflns_number_gt                7947
_reflns_number_total             8644
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5dt00620a3.cif
_cod_data_source_block           4
_cod_depositor_comments
'Adding full bibliography for 7718451--7718458.cif.'
_cod_database_code               7718456
_shelx_shelxl_version_number     2018/3