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_4067143
_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            'C26 H37 Li N2 O'
_chemical_formula_weight         400.52
_chemical_name_systematic
; 
2,4,6-mesityl-DAB + 1 equiv MeLi, 15*Et2O, G2067.cif
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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                   16.436(3)
_cell_length_b                   8.7758(17)
_cell_length_c                   17.154(4)
_cell_measurement_reflns_used    937
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      19.16
_cell_measurement_theta_min      2.63
_cell_volume                     2474.3(9)
_computing_cell_refinement
;
        APEX2(Bruker, 2007, Bruker AXS Inc.,Madison, USA)
;
_computing_data_collection
;
        APEX2(Bruker, 2007, Bruker AXS Inc., Madison, USA)
;
_computing_data_reduction
;
        APEX2(Bruker, 2007, Bruker AXS Inc., Madison, USA)
;
_computing_molecular_graphics    'SHELXTL-Plus. Sheldrick, G. M. (2008)'
_computing_structure_refinement  'SHELXL-97. Sheldrick, G. M. (2008)'
_computing_structure_solution    'SHELXS-97. Sheldrick, G. M. (2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker kappa APEXII CCD Area Detector'
_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  0.1215
_diffrn_reflns_av_sigmaI/netI    0.1611
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            8557
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.75
_exptl_absorpt_coefficient_mu    0.064
_exptl_absorpt_correction_T_max  0.9915
_exptl_absorpt_correction_T_min  0.9833
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.075
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plates
_exptl_crystal_F_000             872
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.242
_refine_diff_density_min         -0.183
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -3(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.869
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         4011
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.869
_refine_ls_R_factor_all          0.1641
_refine_ls_R_factor_gt           0.0614
_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^)+(0.1000P)^2^+0.3852P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1414
_refine_ls_wR_factor_ref         0.1950
_reflns_number_gt                1964
_reflns_number_total             4011
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om100850p_si_001.cif
_cod_data_source_block           inpca21
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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        2474.3(8)
_cod_original_sg_symbol_H-M      Pca2(1)
_cod_database_code               4067143