Salt metathesis routes to homoleptic near-linear Mg(ii) and Ca(ii) bulky bis(silyl)amide complexes.
Leng, Ji-Dong; Goodwin, Conrad A. P.; Vitorica-Yrezabal, Iñigo J; Mills, David P.; Dalton transactions (Cambridge, England : 2003) 47 (2018) 12526–12533; doi:10.1039/c8dt00802g

data_7046002
_publ_section_title
;
 Salt metathesis routes to homoleptic near-linear Mg(ii) and Ca(ii) bulky
 bis(silyl)amide complexes.
;
_journal_issue                   36
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12526
_journal_page_last               12533
_journal_paper_doi               10.1039/c8dt00802g
_journal_volume                  47
_journal_year                    2018
_chemical_formula_moiety         'C36 H84 Ca N2 Si4'
_chemical_formula_sum            'C36 H84 Ca N2 Si4'
_chemical_formula_weight         697.49
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-02-18
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2018-02-25 deposited with the CCDC.
2018-04-10 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   20.5592(5)
_cell_length_b                   16.2479(7)
_cell_length_c                   26.1021(8)
_cell_measurement_reflns_used    4102
_cell_measurement_temperature    150.03(10)
_cell_measurement_theta_max      26.2050
_cell_measurement_theta_min      2.2310
_cell_volume                     8719.2(5)
_computing_cell_refinement       'CrysAlisPro 1.171.39.30c (Rigaku OD, 2017)'
_computing_data_collection       'CrysAlisPro 1.171.39.30c (Rigaku OD, 2017)'
_computing_data_reduction        'CrysAlisPro 1.171.39.30c (Rigaku OD, 2017)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.03(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 16.1428
_diffrn_detector_type            Eos
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w    -92.00   2.00   1.00    4.00    --  -22.82 -57.00-180.00   94
  2  \w    -63.00  25.00   1.00    4.00    --  -22.82  37.00-180.00   88
  3  \w    -15.00  22.00   1.00    4.00    --  -22.82 -99.00 120.00   37
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Single source at offset/far, Eos'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      0.0004776000
_diffrn_orient_matrix_UB_12      0.0095671000
_diffrn_orient_matrix_UB_13      -0.0265330000
_diffrn_orient_matrix_UB_21      0.0001812000
_diffrn_orient_matrix_UB_22      0.0425528000
_diffrn_orient_matrix_UB_23      0.0059484000
_diffrn_orient_matrix_UB_31      0.0345016000
_diffrn_orient_matrix_UB_32      -0.0003363000
_diffrn_orient_matrix_UB_33      0.0003234000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0952
_diffrn_reflns_av_unetI/netI     0.1160
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            26905
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.348
_diffrn_reflns_theta_min         2.233
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.279
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.556
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.30c (Rigaku Oxford Diffraction, 2017)
Numerical absorption correction based on gaussian integration over
            a multifaceted crystal model
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.063
_exptl_crystal_description       block
_exptl_crystal_F_000             3120
_exptl_crystal_size_max          0.365
_exptl_crystal_size_mid          0.297
_exptl_crystal_size_min          0.264
_refine_diff_density_max         0.341
_refine_diff_density_min         -0.278
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.012
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     412
_refine_ls_number_reflns         7967
_refine_ls_number_restraints     344
_refine_ls_restrained_S_all      0.990
_refine_ls_R_factor_all          0.1177
_refine_ls_R_factor_gt           0.0589
_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^)+(0.0408P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1089
_refine_ls_wR_factor_ref         0.1383
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4622
_reflns_number_total             7967
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt00802g2.cif
_cod_data_source_block           6
_cod_depositor_comments
'Adding full bibliography for 7045998--7046003.cif.'
_cod_database_code               7046002
_manchester_internal_coll_name   adpm271
_manchester_internal_coll_client JDL
_manchester_internal_coll_type   custom
_manchester_internal_coll_frame_time 10s
_manchester_internal_coll_frame_width 1
_manchester_internal_coll_frame_method '\w scans'
_manchester_internal_coll_user   JDL
_manchester_internal_coll_date   30/3/15
_manchester_internal_process_user CAPG
_manchester_internal_process_date 15/2/18
_manchester_internal_solution_user CAPG
_manchester_internal_solution_date 16/2/18
_manchester_internal_refinement_user CAPG
_manchester_internal_refinement_date 17/2/18
_manchester_internal_validation_user IVJY
_manchester_internal_validation_date 23/2/18
_manchester_internal_archive_date 23/2/18
_shelx_shelxl_version_number     2018/1
_chemical_oxdiff_formula         'C11 H10 N O'
_reflns_odcompleteness_completeness 99.52
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Rigid body (RIGU) restrains
 All non-hydrogen atoms
 with sigma for 1-2 distances of 0.01 and sigma for 1-3 distances of 0.01
3.a Ternary CH refined with riding coordinates:
 C1(H1), C4(H4), C7(H7), C10(H10), C13(H13), C16(H16), C19(H19), C22(H22),
 C25(H25), C28(H28), C31(H31), C34(H34)
3.b Idealised Me refined as rotating group:
 C2(H2A,H2B,H2C), C3(H3A,H3B,H3C), C5(H5A,H5B,H5C), C6(H6A,H6B,H6C), C8(H8A,
 H8B,H8C), C9(H9A,H9B,H9C), C11(H11A,H11B,H11C), C12(H12A,H12B,H12C), C14(H14A,
 H14B,H14C), C15(H15A,H15B,H15C), C17(H17A,H17B,H17C), C18(H18A,H18B,H18C),
 C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C23(H23A,H23B,H23C), C24(H24A,H24B,
 H24C), C26(H26A,H26B,H26C), C27(H27A,H27B,H27C), C29(H29A,H29B,H29C), C30(H30A,
 H30B,H30C), C32(H32A,H32B,H32C), C33(H33A,H33B,H33C), C35(H35A,H35B,H35C),
 C36(H36A,H36B,H36C)
;
_shelx_res_checksum              41515
_olex2_exptl_crystal_mounting_method 'From fomblin on a microscope slide.'
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 2.060
_oxdiff_exptl_absorpt_empirical_full_min 0.670