Remarkable reversal of melting point alternation by co-crystallization
Braga, Dario; Dichiarante, Elena; Palladino, Giuseppe; Grepioni, Fabrizia; Chierotti, Michele R.; Gobetto, Roberto; Pellegrino, Luca; CrystEngComm 12 (2010) 3534–; doi:10.1039/c0ce00253d

data_7212867
_publ_section_title
;
 Remarkable reversal of melting point alternation by co-crystallization
;
_journal_issue                   11
_journal_name_full               CrystEngComm
_journal_page_first              3534
_journal_paper_doi               10.1039/c0ce00253d
_journal_volume                  12
_journal_year                    2010
_chemical_formula_sum            'C21 H28 N2 O4'
_chemical_formula_weight         372.45
_chemical_name_systematic
;
?
;
_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_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 99.851(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.656(3)
_cell_length_b                   8.4290(10)
_cell_length_c                   22.310(2)
_cell_measurement_temperature    293(2)
_cell_volume                     1974.3(6)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0106
_diffrn_reflns_av_sigmaI/netI    0.0147
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1768
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         3.10
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.253
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.245
_refine_diff_density_min         -0.182
_refine_diff_density_rms         0.044
_refine_ls_extinction_coef       0.0188(19)
_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   1.006
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     127
_refine_ls_number_reflns         1720
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.0605
_refine_ls_R_factor_gt           0.0424
_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^)+(0.0725P)^2^+0.9579P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1152
_refine_ls_wR_factor_ref         0.1291
_reflns_number_gt                1292
_reflns_number_total             1720
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0ce00253d.txt
_cod_data_source_block           1.C9
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7212867