Reversible and Irreversible Higher-Order Cycloaddition Reactions of Polyolefins with a Multiple-Bonded Heavier Group 13 Alkene Analogue: Contrasting the Behavior of Systems with π-π, π-π*, and π-n+ Frontier Molecular Orbital Symmetry
Christine A. Caputo; Jing-Dong Guo; Shigeru Nagase; James C. Fettinger; Philip P. Power; Journal of the American Chemical Society 134 (2012) 7155–7164; doi:10.1021/ja301247h

data_4117854
_publ_section_title
;
 Reversible and Irreversible Higher-Order Cycloaddition Reactions of
 Polyolefins with a Multiple-Bonded Heavier Group 13 Alkene Analogue:
 Contrasting the Behavior of Systems with \p-\p, \p-\p*, and \p-n+
 Frontier Molecular Orbital Symmetry
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7155
_journal_page_last               7164
_journal_paper_doi               10.1021/ja301247h
_journal_volume                  134
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C67 H82 Ga2, C4 H10 O'
_chemical_formula_sum            'C71 H92 Ga2 O'
_chemical_formula_weight         1100.89
_chemical_name_common            Ar'Ga(C7H8)GaAr'
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 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                   12.361(3)
_cell_length_b                   20.068(4)
_cell_length_c                   24.351(5)
_cell_measurement_reflns_used    9692
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      28.27
_cell_measurement_theta_min      2.56
_cell_volume                     6041(2)
_computing_cell_refinement       'SAINT (7.68A) (Bruker, 2009)'
_computing_data_collection       'Apex2 (2010-11.3) (Bruker, 2010)'
_computing_data_reduction        'SAINT (7.68A) (Bruker, 2009)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0166
_diffrn_reflns_av_sigmaI/netI    0.0123
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            68292
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.35
_exptl_absorpt_coefficient_mu    0.934
_exptl_absorpt_correction_T_max  0.8803
_exptl_absorpt_correction_T_min  0.7933
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2008/1 (Sheldrick, 2008)'
_exptl_crystal_colour            Red
_exptl_crystal_density_diffrn    1.211
_exptl_crystal_description       Block
_exptl_crystal_F_000             2352
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.762
_refine_diff_density_min         -0.828
_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   -0.007(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     717
_refine_ls_number_reflns         13855
_refine_ls_number_restraints     8
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0257
_refine_ls_R_factor_gt           0.0245
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0235P)^2^+3.4251P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0581
_refine_ls_wR_factor_ref         0.0588
_reflns_number_gt                13449
_reflns_number_total             13855
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja301247h_si_001.cif
_cod_data_source_block           cc31ff
_cod_database_code               4117854