Metalation of 2,4,6-Trimethylacetophenone Using Organozinc Reagents: The Role of the Base in Determining Composition and Structure of the Developing Enolate
Armstrong, David R.; Drummond, Allison M.; Balloch, Liam; Graham, David V.; Hevia, Eva; Kennedy, Alan R.; Organometallics 27 (2008) 5860–; doi:10.1021/om800658s

data_4072194
_publ_section_title
;
 Metalation of 2,4,6-Trimethylacetophenone Using Organozinc Reagents: The
 Role of the Base in Determining Composition and Structure of the
 Developing Enolate
;
_journal_issue                   22
_journal_name_full               Organometallics
_journal_page_first              5860
_journal_paper_doi               10.1021/om800658s
_journal_volume                  27
_journal_year                    2008
_chemical_formula_sum            'C62 H90 Li2 N2 O4 Zn'
_chemical_formula_weight         1006.61
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           70
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-F 2uv 2vw'
_symmetry_space_group_name_H-M   'F d d d :2'
_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            8
_cell_length_a                   20.948(5)
_cell_length_b                   20.964(5)
_cell_length_c                   27.849(8)
_cell_measurement_reflns_used    16613
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.89
_cell_measurement_theta_min      2.58
_cell_volume                     12230(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'Oxford Xcalibur 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  0.0537
_diffrn_reflns_av_sigmaI/netI    0.0297
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            53086
_diffrn_reflns_theta_full        28.78
_diffrn_reflns_theta_max         28.78
_diffrn_reflns_theta_min         2.59
_exptl_absorpt_coefficient_mu    0.445
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.093
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             4352
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.802
_refine_diff_density_min         -0.228
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.982
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         3912
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      0.987
_refine_ls_R_factor_all          0.0627
_refine_ls_R_factor_gt           0.0454
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0811P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1135
_refine_ls_wR_factor_ref         0.1186
_reflns_number_gt                2999
_reflns_number_total             3912
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            om800658s_si_002.cif
_cod_data_source_block           new
_cod_original_cell_volume        12230(6)
_cod_original_sg_symbol_H-M      Fddd
_cod_database_code               4072194