Concomitant [2 + 2] cycloaddition solid state reactions from co-crystals self-assembled via mechanochemistry
Avendaño, Carlos; Briceño, Alexander; CrystEngComm 11 (2009) 408–; doi:10.1039/b820463b

data_7200700
_publ_section_title
;
 Concomitant [2 + 2] cycloaddition solid state reactions from
 co-crystals self-assembled via mechanochemistry
;
_journal_issue                   3
_journal_name_full               CrystEngComm
_journal_page_first              408
_journal_paper_doi               10.1039/b820463b
_journal_volume                  11
_journal_year                    2009
_chemical_compound_source        Synthesis
_chemical_formula_moiety         'C12 H10 N2, C4 H4 O4'
_chemical_formula_sum            'C16 H14 N2 O4'
_chemical_formula_weight         298.29
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             '20 August 2008'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 119.067(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.911(11)
_cell_length_b                   3.9313(15)
_cell_length_c                   18.607(9)
_cell_measurement_reflns_used    837
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      26.10
_cell_measurement_theta_min      2.42
_cell_volume                     1464.9(12)
_computing_cell_refinement       'CrystalClear (Rigaku/MSC Inc., 2005)'
_computing_data_collection       'CrystalClear (Rigaku/MSC Inc., 2005)'
_computing_data_reduction        'CrystalClear (Rigaku/MSC Inc., 2005)'
_computing_molecular_graphics
;
SHELXLTL-NT V5.1 (Bruker AXS, 1998) and DIAMOND
(Brandenburg, 1998)
;
_computing_publication_material
;
SHELXLTL-NT V5.1 (Bruker AXS, 1998) and PLATON (Spek, 2003).
;
_computing_structure_refinement  'SHELXLTL-NT V5.1 (Bruker AXS, 1998)'
_computing_structure_solution    'SHELXLTL-NT V5.1 (Bruker AXS, 1998)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.815
_diffrn_measurement_device       'Mercury (2x2 bin mode)'
_diffrn_measurement_device_type  'Rigaku AFC7S Mercury'
_diffrn_measurement_method       '\w '
_diffrn_radiation_detector       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0594
_diffrn_reflns_av_sigmaI/netI    0.0637
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       3
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            7548
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.13
_diffrn_reflns_theta_min         2.03
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.946
_exptl_absorpt_correction_T_min  0.913
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            'Pale yellow'
_exptl_crystal_density_diffrn    1.353
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.284
_refine_diff_density_min         -0.193
_refine_diff_density_rms         0.060
_refine_ls_extinction_coef       0.011(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.012
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     105
_refine_ls_number_reflns         1457
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.0888
_refine_ls_R_factor_gt           0.0547
_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^)+(0.0741P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1326
_refine_ls_wR_factor_ref         0.1566
_reflns_number_gt                962
_reflns_number_total             1457
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b820463b.txt
_cod_data_source_block           c2c-p
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi Scan' changed
to 'multi-scan' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_Hall     -C2yc
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7200700