Polymorphism and isomorphism of Huperzine A solvates: structure, properties and form transformation
Zhang, Qi; Lu, Liye; Dai, Wenjuan; Mei, Xuefeng; CrystEngComm 16 (2014) 1919–; doi:10.1039/c3ce41965g

data_7213732
_publ_section_title
;
 Polymorphism and isomorphism of Huperzine A solvates: structure,
 properties and form transformation
;
_journal_issue                   10
_journal_name_full               CrystEngComm
_journal_page_first              1919
_journal_paper_doi               10.1039/c3ce41965g
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_formula_sum            'C19 H26 N2 O2'
_chemical_formula_weight         314.42
_chemical_name_common            'Hup A Form S2'
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 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                 130.2740(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.9216(4)
_cell_length_b                   7.47330(10)
_cell_length_c                   15.2146(3)
_cell_measurement_reflns_used    3384
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.51
_cell_measurement_theta_min      1.75
_cell_volume                     1728.22(6)
_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, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0196
_diffrn_reflns_av_sigmaI/netI    0.0187
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            14752
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_T_max  0.981
_exptl_absorpt_correction_T_min  0.970
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.208
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.420
_refine_diff_density_min         -0.214
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.6(10)
_refine_ls_extinction_coef       0.0043(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         3884
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0369
_refine_ls_R_factor_gt           0.0361
_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^)+(0.0653P)^2^+0.7311P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1011
_refine_ls_wR_factor_ref         0.1020
_reflns_number_gt                3803
_reflns_number_total             3884
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce41965g.txt
_cod_data_source_block           S4.CIF
_cod_original_cell_volume        1728.22(5)
_cod_original_sg_symbol_H-M      C2
_cod_database_code               7213732