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_7213728
_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            'C15 H20 N2 O2'
_chemical_formula_weight         256.33
_chemical_name_common            'Hup A Form H2'
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.0653(5)
_cell_length_b                   29.4244(12)
_cell_length_c                   7.6893(3)
_cell_measurement_reflns_used    6169
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      54.87
_cell_measurement_theta_min      4.50
_cell_volume                     2729.81(19)
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_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  0.0835
_diffrn_reflns_av_sigmaI/netI    0.1487
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       38
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            14162
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.82
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6526
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.247
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.705
_refine_diff_density_min         -0.359
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.9(14)
_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   0.827
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         6019
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.827
_refine_ls_R_factor_all          0.1092
_refine_ls_R_factor_gt           0.0497
_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^)+(0.0201P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0793
_refine_ls_wR_factor_ref         0.0912
_reflns_number_gt                3340
_reflns_number_total             6019
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce41965g.txt
_cod_data_source_block           H2.CIF
_cod_original_sg_symbol_H-M      P21212
_cod_database_code               7213728