Neutral zero-valent s-block complexes with strong multiple bonding
Merle Arrowsmith; Holger Braunschweig; Mehmet Ali Celik; Theresa Dellermann; Rian D. Dewhurst; William C. Ewing; Kai Hammond; Thomas Kramer; Ivo Krummenacher; Jan Mies; Krzysztof Radacki; Julia K. Schuster; Nature Chemistry 8 (2016) 890–894; doi:10.1038/nchem.2542

data_1551919
_publ_section_title
;
 Neutral zero-valent s-block complexes with strong multiple bonding
;
_journal_name_full               'Nature Chemistry'
_journal_page_first              890
_journal_page_last               894
_journal_paper_doi               10.1038/nchem.2542
_journal_volume                  8
_journal_year                    2016
_chemical_formula_moiety         'C20 H31 Be Cl2 N'
_chemical_formula_sum            'C20 H31 Be Cl2 N'
_chemical_formula_weight         365.37
_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   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 105.871(18)
_cell_angle_gamma                90
_cell_formula_units_Z            12
_cell_length_a                   22.883(13)
_cell_length_b                   9.955(3)
_cell_length_c                   28.329(9)
_cell_measurement_reflns_used    9396
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.29
_cell_measurement_theta_min      2.18
_cell_volume                     6207(4)
_computing_cell_refinement       'Saint+ ver. V8.34A (Bruker AXS)'
_computing_data_collection       'APEX2 ver. 2014.9 (Bruker AXS)'
_computing_data_reduction        'Saint+ ver. V8.34A (Bruker AXS)'
_computing_molecular_graphics    'ShelXLe (Huebschle et all, 2011)'
_computing_publication_material  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD area detector (Apex2)'
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker X8-APEX II'
_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  0.0417
_diffrn_reflns_av_unetI/netI     0.0474
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            46476
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         26.372
_diffrn_reflns_theta_min         1.850
_diffrn_source                   'rotating-anode (Nonius FR-591)'
_exptl_absorpt_coefficient_mu    0.315
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6982
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SadAbs 2014/5 (Bruker AXS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.173
_exptl_crystal_description       block
_exptl_crystal_F_000             2352
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.313
_refine_diff_density_min         -0.213
_refine_diff_density_rms         0.051
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     673
_refine_ls_number_reflns         12694
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0672
_refine_ls_R_factor_gt           0.0396
_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^)+(0.0400P)^2^+1.5010P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0856
_refine_ls_wR_factor_ref         0.0974
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                9122
_reflns_number_total             12694
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            nchem.2542-s2.cif
_cod_data_source_block           1
_cod_original_cell_volume        6208(5)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               1551919
_shelx_res_checksum              13941
_shelx_hkl_checksum              5174