From 3D channelled frameworks to 2D layered structures in molecular salts of l-serine and dl-serine with oxalic acid
Braga, Dario; Chelazzi, Laura; Ciabatti, Iacopo; Grepioni, Fabrizia; New Journal of Chemistry 37 (2013) 97–; doi:10.1039/c2nj40379j

data_7052972
_publ_section_title
;
 From 3D channelled frameworks to 2D layered structures in molecular salts
 of l-serine and dl-serine with oxalic acid
;
_journal_issue                   1
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              97
_journal_paper_doi               10.1039/c2nj40379j
_journal_volume                  37
_journal_year                    2013
_chemical_absolute_configuration rm
_chemical_formula_sum            'C8 H20 N2 O12'
_chemical_formula_weight         336.26
_chemical_name_systematic
;
?
;
_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                 92.018(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   4.8832(6)
_cell_length_b                   11.9276(14)
_cell_length_c                   12.4798(15)
_cell_measurement_temperature    293(2)
_cell_volume                     726.43(15)
_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 0.898
_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  0.0732
_diffrn_reflns_av_sigmaI/netI    0.1938
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            5125
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.96
_diffrn_reflns_theta_min         3.27
_exptl_absorpt_coefficient_mu    0.147
_exptl_absorpt_correction_T_max  0.9855
_exptl_absorpt_correction_T_min  0.9855
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.528
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cube
_exptl_crystal_F_000             356
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.766
_refine_diff_density_min         -0.335
_refine_diff_density_rms         0.080
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.149
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     203
_refine_ls_number_reflns         2878
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.149
_refine_ls_R_factor_all          0.1904
_refine_ls_R_factor_gt           0.0963
_refine_ls_shift/su_max          0.012
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0230P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1360
_refine_ls_wR_factor_ref         0.1693
_reflns_number_gt                1462
_reflns_number_total             2878
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2nj40379j.txt
_cod_data_source_block           L_FormI_2H2O
_cod_original_sg_symbol_H-M      P21
_cod_database_code               7052972