Alternating α-Olefin Distributions via Single and Double Insertions in Chromium-Catalyzed Ethylene Oligomerization
Tomov, Atanas K.; Nobbs, James D.; Chirinos, Juan J.; Saini, Prabhjot K.; Malinowski, Robert; Ho, Sarah K. Y.; Young, Craig T.; McGuinness, David S.; White, Andrew J. P.; Elsegood, Mark R. J.; Britovsek, George J. P.; Organometallics 36 (2016) 510–; doi:10.1021/acs.organomet.6b00671

data_4086828
_publ_section_title
;
 Alternating \a-Olefin Distributions via Single and Double Insertions in
 Chromium-Catalyzed Ethylene Oligomerization
;
_journal_issue                   3
_journal_name_full               Organometallics
_journal_page_first              510
_journal_paper_doi               10.1021/acs.organomet.6b00671
_journal_volume                  36
_journal_year                    2016
_chemical_formula_moiety         'C20 H17 Cr N5 O3, 2.5(C4 H8 O)'
_chemical_formula_sum            'C30 H37 Cr N5 O5.5'
_chemical_formula_weight         607.64
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90
_cell_angle_beta                 91.5897(18)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.3961(18)
_cell_length_b                   15.718(2)
_cell_length_c                   14.2278(19)
_cell_measurement_reflns_used    7942
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.40
_cell_measurement_theta_min      2.44
_cell_volume                     2994.7(7)
_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  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.897
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0423
_diffrn_reflns_av_unetI/netI     0.0504
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.897
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            24876
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.897
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         28.789
_diffrn_reflns_theta_min         1.521
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.431
_exptl_absorpt_correction_T_max  0.966
_exptl_absorpt_correction_T_min  0.867
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, v.2.08, Sheldrick, G.M., (2003)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.348
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1280
_exptl_crystal_size_max          0.340
_exptl_crystal_size_mid          0.280
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.716
_refine_diff_density_min         -0.334
_refine_diff_density_rms         0.077
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     404
_refine_ls_number_reflns         6995
_refine_ls_number_restraints     148
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.1003
_refine_ls_R_factor_gt           0.0513
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0741P)^2^+2.8043P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1336
_refine_ls_wR_factor_ref         0.1677
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4459
_reflns_number_total             6995
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            om6b00671_si_002.cif
_cod_data_source_block           '[Cr(2)(CO)3]'
_cod_depositor_comments
'Adding full bibliography for 4086828--4086833.cif.'
_cod_original_formula_sum        'C30 H37 Cr N5 O5.50'
_cod_database_code               4086828
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.867
_shelx_estimated_absorpt_t_max   0.966