Monomeric Cp3tAl(I): Synthesis, reactivity, and the concept of valence isomerism
Braunschweig, Holger; Kupfer, Thomas; Hofmann, Alexander; Tröster, Tobias; Chemical Science  (2019) –; doi:10.1039/C8SC05175E

data_1550471
_publ_section_title
;
 Monomeric Cp3tAl(I): Synthesis, reactivity, and the concept of valence
 isomerism
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C8SC05175E
_journal_year                    2019
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C34 H58 Al2 Br2'
_chemical_formula_sum            'C34 H58 Al2 Br2'
_chemical_formula_weight         680.58
_space_group_crystal_system      monoclinic
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_space_group_name_H-M_alt        'C 1 c 1'
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2018-11-09 deposited with the CCDC.
2019-01-14 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 93.33(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   19.582(6)
_cell_length_b                   8.479(2)
_cell_length_c                   21.301(8)
_cell_measurement_reflns_used    9812
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.13
_cell_measurement_theta_min      2.62
_cell_volume                     3530.8(19)
_computing_cell_refinement       'Saint+ ver. V8.38A (Bruker AXS)'
_computing_data_collection       'APEX2 ver. 2014.9 (Bruker AXS)'
_computing_data_reduction        'Saint+ ver. V8.38A (Bruker AXS)'
_computing_molecular_graphics    'ShelXLe (Huebschle et all, 2011)'
_computing_publication_material  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CMOS area detector (Photon 100)'
_diffrn_detector_area_resol_mean 10.24
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker D8 Quest'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multi-layer mirror'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0588
_diffrn_reflns_av_unetI/netI     0.0360
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            48578
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         26.021
_diffrn_reflns_theta_min         2.242
_diffrn_source                   'microfocus sealed tube (Incoatec ImS)'
_exptl_absorpt_coefficient_mu    2.366
_exptl_absorpt_correction_T_max  0.6941
_exptl_absorpt_correction_T_min  0.5801
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SadAbs 2016/2 (Bruker AXS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.280
_exptl_crystal_description       block
_exptl_crystal_F_000             1432
_exptl_crystal_size_max          0.216
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.143
_refine_diff_density_max         1.109
_refine_diff_density_min         -0.798
_refine_diff_density_rms         0.120
_refine_ls_abs_structure_details
;
 Flack x determined using 2980 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.001(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.186
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     362
_refine_ls_number_reflns         6954
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.185
_refine_ls_R_factor_all          0.0428
_refine_ls_R_factor_gt           0.0370
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0566P)^2^+13.2882P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1147
_refine_ls_wR_factor_ref         0.1182
_reflns_Friedel_coverage         0.999
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.997
_reflns_number_gt                6394
_reflns_number_total             6954
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8sc05175e2.cif
_cod_data_source_block           4
_cod_original_cell_volume        3531(2)
_cod_database_code               1550471
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.629
_shelx_estimated_absorpt_t_max   0.728
_shelx_res_checksum              58516