IR low-temperature matrix, X-ray and ab initio study on L-isoserine conformations.
Dobrowolski, Jan Cz; Jamróz, Michał H; Kołos, Robert; Rode, Joanna E.; Cyrański, Michał K; Sadlej, Joanna; Physical chemistry chemical physics : PCCP 12 (2010) 10818–10830; doi:10.1039/c0cp00016g

data_7212900
_publ_section_title
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 IR low-temperature matrix, X-ray and ab initio study on L-isoserine
 conformations.
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_journal_issue                   36
_journal_name_full               'Physical chemistry chemical physics : PCCP'
_journal_page_first              10818
_journal_page_last               10830
_journal_paper_doi               10.1039/c0cp00016g
_journal_volume                  12
_journal_year                    2010
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C3 H7 N O3'
_chemical_formula_sum            'C3 H7 N O3'
_chemical_formula_weight         105.10
_chemical_name_common            L-isoserine
_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            4
_cell_length_a                   9.9244(12)
_cell_length_b                   10.3690(15)
_cell_length_c                   4.0380(6)
_cell_measurement_reflns_used    7914
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.5311
_cell_measurement_theta_min      2.8278
_cell_volume                     415.53(10)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.6479
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  KM4CCD
_diffrn_measurement_method       'omega scan'
_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  0.0168
_diffrn_reflns_av_sigmaI/netI    0.0073
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            7815
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.59
_diffrn_reflns_theta_min         2.84
_diffrn_standards_number         '1 frame'
_exptl_absorpt_coefficient_mu    0.150
_exptl_absorpt_correction_T_max  1.03390
_exptl_absorpt_correction_T_min  0.96734
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.680
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             224
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.363
_refine_diff_density_min         -0.150
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_extinction_coef       0.081(12)
_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   1.093
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     81
_refine_ls_number_reflns         648
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.093
_refine_ls_R_factor_all          0.0235
_refine_ls_R_factor_gt           0.0229
_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^)+(0.0374P)^2^+0.1180P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0622
_refine_ls_wR_factor_ref         0.0625
_reflns_number_gt                630
_reflns_number_total             648
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0cp00016g.txt
_cod_data_source_block           L_isoserine
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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_Hall     P22ab
_cod_original_sg_symbol_H-M      P2(1)2(1)2
_cod_database_code               7212900