Sterically Hindered Diazabutadienes (DABs): Competing Reaction Pathways with MeLi
Bhadbhade, Mohan; Clentsmith, Guy K. B.; Field, Leslie D.; Organometallics 29 (2010) 6509–; doi:10.1021/om100850p

data_4067146
_publ_section_title
;
 Sterically Hindered Diazabutadienes (DABs): Competing Reaction Pathways
 with MeLi
;
_journal_issue                   23
_journal_name_full               Organometallics
_journal_page_first              6509
_journal_paper_doi               10.1021/om100850p
_journal_volume                  29
_journal_year                    2010
_chemical_formula_sum            'C32 H49 Li N2 O'
_chemical_formula_weight         484.67
_chemical_name_systematic
; 
Isopropyl DAB + 1 equiv LDA, G2075, 17Et2O 
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.017(15)
_cell_length_b                   30.64(6)
_cell_length_c                   10.062(13)
_cell_measurement_reflns_used    2484
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      20.183
_cell_measurement_theta_min      2.454
_cell_volume                     3088(9)
_computing_cell_refinement       '<i>APEX2 </i>(Bruker, 2007)'
_computing_data_collection       '<i>APEX2 </i>(Bruker, 2007)'
_computing_data_reduction        '<i>APEX2 </i>(Bruker, 2007)'
_computing_molecular_graphics    '<i>SHELXTL-Plus</i> (Sheldrick, 2008)'
_computing_structure_refinement  '<i>SHELXL-97</i> (Sheldrick, 2008)'
_computing_structure_solution    '<i>SHELXS-97</i> (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'Bruker kappa APEXII CCD Diffractometer'
_diffrn_measurement_method       '\f scans, and \w scans with \k offsets'
_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  0.0475
_diffrn_reflns_av_sigmaI/netI    0.1069
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       36
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            11011
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.33
_exptl_absorpt_coefficient_mu    0.061
_exptl_absorpt_correction_T_max  0.9964
_exptl_absorpt_correction_T_min  0.9849
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2001)'
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.042
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Large blocks'
_exptl_crystal_F_000             1064
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.619
_refine_diff_density_min         -0.480
_refine_diff_density_rms         0.102
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   3(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   2.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     785
_refine_ls_number_reflns         8574
_refine_ls_number_restraints     324
_refine_ls_restrained_S_all      1.999
_refine_ls_R_factor_all          0.2126
_refine_ls_R_factor_gt           0.1633
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.6368P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3774
_refine_ls_wR_factor_ref         0.3952
_reflns_number_gt                5481
_reflns_number_total             8574
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om100850p_si_001.cif
_cod_data_source_block           inp21
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        3089(9)
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               4067146