Experimental Investigation on the Mechanism of Chelation-Assisted, Copper(II) Acetate-Accelerated Azide-Alkyne Cycloaddition
Gui-Chao Kuang; Pampa M. Guha; Wendy S. Brotherton; J. Tyler Simmons; Lisa A. Stankee; Brian T. Nguyen; Ronald J. Clark; Lei Zhu; Journal of the American Chemical Society 133 (2011) 13984–14001; doi:10.1021/ja203733q

data_4106681
_publ_section_title
;
 Experimental Investigation on the Mechanism of Chelation-Assisted,
 Copper(II) Acetate-Accelerated Azide-Alkyne Cycloaddition
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13984
_journal_page_last               14001
_journal_paper_doi               10.1021/ja203733q
_journal_volume                  133
_journal_year                    2011
_chemical_formula_moiety         'C20 H24 Cu2 N8 O8'
_chemical_formula_sum            'C20 H24 Cu2 N8 O8'
_chemical_formula_weight         631.55
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 114.4480(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.1756(5)
_cell_length_b                   19.3065(13)
_cell_length_c                   8.7629(6)
_cell_measurement_reflns_used    7984
_cell_measurement_temperature    163(2)
_cell_measurement_theta_max      28.89
_cell_measurement_theta_min      2.74
_cell_volume                     1259.14(14)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_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      163(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0203
_diffrn_reflns_av_sigmaI/netI    0.0164
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            12565
_diffrn_reflns_theta_full        27.10
_diffrn_reflns_theta_max         27.10
_diffrn_reflns_theta_min         2.11
_exptl_absorpt_coefficient_mu    1.751
_exptl_absorpt_correction_T_max  0.8472
_exptl_absorpt_correction_T_min  0.6042
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.666
_exptl_crystal_description       plate,
_exptl_crystal_F_000             644
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.347
_refine_diff_density_min         -0.356
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         2784
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0224
_refine_ls_R_factor_gt           0.0206
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0325P)^2^+0.5663P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0571
_refine_ls_wR_factor_ref         0.0581
_reflns_number_gt                2600
_reflns_number_total             2784
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja203733q_si_001.cif
_cod_data_source_block           zhu86
_cod_original_sg_symbol_Hall     -P2ybc
_cod_database_code               4106681