Does crystal or gel matter to stereochemistry of a reaction? Silver complexation-promoted solid-state [2+2] reaction of an unsymmetrical olefin
Suman Samai; Prabir Ghosha; Kumar Biradha; Chem.Commun. 49 (2013) 4181–; doi:10.1039/c2cc34901a

data_7109183
_publ_section_title
;
 Does crystal or gel matter to stereochemistry of a reaction? Silver
 complexation-promoted solid-state [2+2] reaction of an unsymmetrical
 olefin
;
_journal_name_full               Chem.Commun.
_journal_page_first              4181
_journal_paper_doi               10.1039/c2cc34901a
_journal_volume                  49
_journal_year                    2013
_chemical_formula_sum            'C15 H15 Ag N4 O4'
_chemical_formula_weight         423.18
_chemical_name_systematic
;
?
;
_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                 99.438(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.750(2)
_cell_length_b                   19.835(5)
_cell_length_c                   10.502(3)
_cell_measurement_reflns_used    17927
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      2.22
_cell_volume                     1592.5(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.966
_diffrn_measured_fraction_theta_max 0.966
_diffrn_measurement_device_type  'Bruker CCD apex 2'
_diffrn_measurement_method       hemisphere
_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  0.2339
_diffrn_reflns_av_sigmaI/netI    0.1548
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            17927
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.22
_exptl_absorpt_coefficient_mu    1.294
_exptl_absorpt_correction_T_max  0.845
_exptl_absorpt_correction_T_min  0.780
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.765
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.909
_refine_diff_density_min         -0.515
_refine_diff_density_rms         0.117
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.836
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         2717
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.836
_refine_ls_R_factor_all          0.2042
_refine_ls_R_factor_gt           0.0742
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1487
_refine_ls_wR_factor_ref         0.1902
_reflns_number_gt                1137
_reflns_number_total             2717
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc34901a.txt
_cod_data_source_block           3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        1592.6(7)
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7109183