Mesityl Alkyne Substituents for Control of Regiochemistry and Reversibility in Zirconocene Couplings: New Synthetic Strategies for Unsymmetrical Zirconacyclopentadienes and Conjugated Polymers
Adam D. Miller; John F. Tannaci; Samuel A. Johnson; Hyuk Lee; Jennifer L. McBee; T. Don Tilley; Journal of the American Chemical Society 131 (2009) 4917–4927; doi:10.1021/ja809896t

data_4104133
_publ_section_title
;
 Mesityl Alkyne Substituents for Control of Regiochemistry and
 Reversibility in Zirconocene Couplings: New Synthetic Strategies for
 Unsymmetrical Zirconacyclopentadienes and Conjugated Polymers
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4917
_journal_page_last               4927
_journal_paper_doi               10.1021/ja809896t
_journal_volume                  131
_journal_year                    2009
_chemical_formula_moiety         'C30 H26'
_chemical_formula_sum            'C30 H26'
_chemical_formula_weight         386.51
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 92.094(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.4214(15)
_cell_length_b                   7.4290(11)
_cell_length_c                   14.284(2)
_cell_measurement_reflns_used    1971
_cell_measurement_temperature    146(2)
_cell_measurement_theta_max      28.82
_cell_measurement_theta_min      2.37
_cell_volume                     1105.1(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      146(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       \w/q-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  0.0648
_diffrn_reflns_av_sigmaI/netI    0.0482
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            8050
_diffrn_reflns_theta_full        23.93
_diffrn_reflns_theta_max         23.93
_diffrn_reflns_theta_min         2.38
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.065
_exptl_absorpt_correction_T_max  0.9903
_exptl_absorpt_correction_T_min  0.9870
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'sadabs, 2004'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.161
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             412
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.355
_refine_diff_density_min         -0.305
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.169
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     136
_refine_ls_number_reflns         1727
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.169
_refine_ls_R_factor_all          0.0826
_refine_ls_R_factor_gt           0.0556
_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^)+(0.0644P)^2^+0.2951P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1423
_refine_ls_wR_factor_ref         0.1563
_reflns_number_gt                1213
_reflns_number_total             1727
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja809896t_si_004.cif
_cod_data_source_block           adam20m_0ma
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4104133