Mechanochemical Conversions Between Crystalline Polymorphs of a Complex Organic Solid
Altheimer, Benjamin D.; Pagola, Silvina; Zeller, Matthias; Mehta, Manish A.; Crystal Growth & Design 13 (2013) 3447–; doi:10.1021/cg400344z

data_4507940
_publ_section_title
;
 Mechanochemical Conversions Between Crystalline Polymorphs of a Complex
 Organic Solid
;
_journal_issue                   8
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              3447
_journal_paper_doi               10.1021/cg400344z
_journal_volume                  13
_journal_year                    2013
_chemical_formula_sum            'C11 H14 N2 O2'
_chemical_formula_weight         206.24
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 104.622(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            6
_cell_length_a                   18.024(6)
_cell_length_b                   4.9974(17)
_cell_length_c                   19.569(7)
_cell_measurement_reflns_used    3954
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      29.7658
_cell_measurement_theta_min      2.6946
_cell_volume                     1705.6(10)
_computing_cell_refinement       'Apex2 v2011.2-0'
_computing_data_collection       'Apex2 v2011.2-0 (Bruker, 2011)'
_computing_data_reduction        'Apex2 v2011.2-0'
_computing_molecular_graphics    'Shelxtl (Bruker, 2003)'
_computing_publication_material  'Shelxtl (Bruker, 2003)'
_computing_structure_refinement
;  
ShelXL (Sheldrick, 2008), 
SHELXLE Rev609 (H\"ubschle et al., 2011)
;
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.903
_diffrn_measurement_device_type  'Bruker AXS SMART APEX CCD diffractometer'
_diffrn_measurement_method       '\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  0.0392
_diffrn_reflns_av_sigmaI/netI    0.0396
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            24430
_diffrn_reflns_theta_full        28.00
_diffrn_reflns_theta_max         31.67
_diffrn_reflns_theta_min         1.37
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.7463
_exptl_absorpt_correction_T_min  0.7005
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Apex2  v2011.2-0 (Bruker, 2011)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.205
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             660
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.146
_refine_diff_density_min         -0.112
_refine_diff_density_rms         0.027
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.4(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     434
_refine_ls_number_reflns         5741
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0897
_refine_ls_R_factor_gt           0.0436
_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^)+(0.0570P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0988
_refine_ls_wR_factor_ref         0.1099
_reflns_number_gt                3342
_reflns_number_total             5741
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cg400344z_si_003.cif
_cod_data_source_block           BetaRT
_cod_original_sg_symbol_H-M      P21
_cod_database_code               4507940