Alkaline-earth metallacyclic complexes bearing a diborane-bridged tetraamide ligand: synthesis, structure and fluorescence property.
Li, Nan; Zhao, Zifeng; Yu, Chao; Wu, Botao; Bian, Zuqiang; Zhang, Wen-Xiong; Xi, Zhenfeng; Dalton transactions (Cambridge, England : 2003) 48 (2019) 9067–9071; doi:10.1039/c9dt02118c

data_1551209
_publ_section_title
;
 Alkaline-earth metallacyclic complexes bearing a diborane-bridged
 tetraamide ligand: synthesis, structure and fluorescence property.
;
_journal_issue                   25
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9067
_journal_page_last               9071
_journal_paper_doi               10.1039/c9dt02118c
_journal_volume                  48
_journal_year                    2019
_chemical_formula_moiety         'C44 H60 B2 Mg2 N4 O6'
_chemical_formula_sum            'C44 H60 B2 Mg2 N4 O6'
_chemical_formula_weight         811.20
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2019-04-16
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-04-16 deposited with the CCDC.    2019-06-04 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 93.484(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   9.0637(3)
_cell_length_b                   14.0668(6)
_cell_length_c                   16.2694(6)
_cell_measurement_reflns_used    4777
_cell_measurement_temperature    119.99(10)
_cell_measurement_theta_max      29.6310
_cell_measurement_theta_min      3.7800
_cell_volume                     2070.47(14)
_computing_cell_refinement       'CrysAlisPro 1.171.39.28b (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.39.28b (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.39.28b (Rigaku OD, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      119.99(10)
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.982
_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    -10.00  27.00   0.50   24.00    --   -1.70 -82.00 120.00   74
  2  \w    -29.00  -2.00   0.50   24.00    --   -1.70 -82.00 -60.00   54
  3  \w     -4.00  30.00   0.50   24.00    --   -1.70 -82.00  30.00   68
  4  \w    -89.00  43.00   0.50   24.00    --   -1.70   0.00-150.00  264
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'XtaLAB AFC12 (RINC): Kappa single'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      -0.0001591000
_diffrn_orient_matrix_UB_12      0.0400993000
_diffrn_orient_matrix_UB_13      0.0263944000
_diffrn_orient_matrix_UB_21      0.0430963000
_diffrn_orient_matrix_UB_22      -0.0254513000
_diffrn_orient_matrix_UB_23      0.0304754000
_diffrn_orient_matrix_UB_31      0.0655092000
_diffrn_orient_matrix_UB_32      0.0168820000
_diffrn_orient_matrix_UB_33      -0.0168246000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0401
_diffrn_reflns_av_unetI/netI     0.0370
_diffrn_reflns_Laue_measured_fraction_full 0.981
_diffrn_reflns_Laue_measured_fraction_max 0.982
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            17412
_diffrn_reflns_point_group_measured_fraction_full 0.981
_diffrn_reflns_point_group_measured_fraction_max 0.982
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.485
_diffrn_reflns_theta_min         3.575
_diffrn_source                   'fine-focus sealed X-ray tube'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.112
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.64700
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.28b (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            'clear yellowish yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   yellowish
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.301
_exptl_crystal_description       block
_exptl_crystal_F_000             868
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.770
_refine_diff_density_min         -0.462
_refine_diff_density_rms         0.088
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         4662
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0849
_refine_ls_R_factor_gt           0.0646
_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^)+(0.1055P)^2^+1.9235P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1752
_refine_ls_wR_factor_ref         0.1885
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3627
_reflns_number_total             4662
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9dt02118c2.cif
_cod_data_source_block           2b
_cod_depositor_comments
'Adding full bibliography for 1551209--1551214.cif.'
_cod_database_code               1551209
_shelx_shelxl_version_number     2017/1
_chemical_oxdiff_formula         'C H O N Mg B'
_shelx_estimated_absorpt_t_max   0.989
_shelx_estimated_absorpt_t_min   0.989
_reflns_odcompleteness_completeness 98.32
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     27.42
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C11(H11a,H11b), C12(H12a,H12b), C13(H13a,H13b), C14(H14a,H14b), C15(H15a,
 H15b), C16(H16a,H16b), C17(H17a,H17b), C18(H18a,H18b), C19(H19a,H19b),
 C20(H20a,H20b), C21(H21a,H21b), C22(H22a,H22b)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C7(H7), C8(H8), C9(H9)
;
_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 1.458
_oxdiff_exptl_absorpt_empirical_full_min 0.795