New ligands for asymmetric diethylzinc additions to aromatic aldehydes, demonstrating substrate-dependent nonlinear effects
Bulman Page, Philip C.; Allin, Steven M.; Maddocks, Suzanne J.; Elsegood, Mark R. J.; Journal of the Chemical Society, Perkin Transactions 1  (2002) 2827–; doi:10.1039/b208810j

data_7204535
_publ_section_title
;
 New ligands for asymmetric diethylzinc additions to aromatic
 aldehydes, demonstrating substrate-dependent nonlinear effects
;
_journal_issue                   24
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 1'
_journal_page_first              2827
_journal_paper_doi               10.1039/b208810j
_journal_year                    2002
_chemical_formula_sum            'C35.67 H33.33 N1.33 O1.33'
_chemical_formula_weight         501.97
_space_group_IT_number           146
_symmetry_cell_setting           rhombohedral
_symmetry_space_group_name_Hall  'R 3'
_symmetry_space_group_name_H-M   'R 3 :H'
_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                120.00
_cell_formula_units_Z            9
_cell_length_a                   27.263(2)
_cell_length_b                   27.263(2)
_cell_length_c                   9.4764(10)
_cell_measurement_reflns_used    6207
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.13
_cell_measurement_theta_min      2.31
_cell_volume                     6099.9(9)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.928
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0314
_diffrn_reflns_av_sigmaI/netI    0.0462
_diffrn_reflns_limit_h_max       35
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       36
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            17684
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.84
_diffrn_reflns_theta_min         1.49
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.074
_exptl_absorpt_correction_T_max  0.980
_exptl_absorpt_correction_T_min  0.946
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Sheldrick, G.M.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.230
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2406
_exptl_crystal_size_max          0.76
_exptl_crystal_size_mid          0.47
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.304
_refine_diff_density_min         -0.226
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -1(3)
_refine_ls_extinction_coef       0.0012(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     335
_refine_ls_number_reflns         6360
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0896
_refine_ls_R_factor_gt           0.0694
_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^)+(0.0667P)^2^+11.2484P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1697
_refine_ls_wR_factor_ref         0.1780
_reflns_number_gt                4805
_reflns_number_total             6360
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b208810j.txt
_cod_data_source_block           4
_cod_original_cell_volume        6099.7(9)
_cod_original_sg_symbol_H-M      R3
_cod_database_code               7204535