N-Heterocyclic carbene stabilized adducts of alkyl magnesium amide, bisalkyl magnesium and Grignard reagents: trapping oligomeric organo s-block fragments with NHCs.
Kennedy, Alan R.; Mulvey, Robert E.; Robertson, Stuart D.; Dalton transactions (Cambridge, England : 2003) 39 (2010) 9091–9099; doi:10.1039/c0dt00693a

data_7026768
_publ_section_title
;
 N-Heterocyclic carbene stabilized adducts of alkyl magnesium amide,
 bisalkyl magnesium and Grignard reagents: trapping oligomeric organo
 s-block fragments with NHCs.
;
_journal_issue                   38
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9091
_journal_page_last               9099
_journal_paper_doi               10.1039/c0dt00693a
_journal_volume                  39
_journal_year                    2010
_chemical_formula_sum            'C62 H90 Cl2 Mg2 N4'
_chemical_formula_weight         1010.90
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.089(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.5268(3)
_cell_length_b                   14.3634(5)
_cell_length_c                   35.1522(11)
_cell_measurement_reflns_used    13127
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      29.07
_cell_measurement_theta_min      2.72
_cell_volume                     6276.5(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Oxford Diffraction Gemini S'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0522
_diffrn_reflns_av_sigmaI/netI    0.0868
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       43
_diffrn_reflns_limit_l_min       -43
_diffrn_reflns_number            36444
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.73
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.161
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.85001
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.070
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2192
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.649
_refine_diff_density_min         -0.699
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.090
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     587
_refine_ls_number_reflns         12334
_refine_ls_number_restraints     118
_refine_ls_restrained_S_all      1.096
_refine_ls_R_factor_all          0.1192
_refine_ls_R_factor_gt           0.0700
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1084P)^2^+0.8913P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1921
_refine_ls_wR_factor_ref         0.2065
_reflns_number_gt                7550
_reflns_number_total             12334
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c0dt00693a.txt
_cod_data_source_block           sdr1004
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7026768