<small>L</small>-Leucine <small>L</small>-leucinium picrate
K. Anitha; S. Athimoolam; R. K. Rajaram; Acta Crystallographica Section E 61 (2005) o1604–o1606; doi:10.1107/S1600536805014030

data_2205871
_publ_section_title
;
 <small>L</small>-Leucine <small>L</small>-leucinium picrate
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1604
_journal_page_last               o1606
_journal_paper_doi               10.1107/S1600536805014030
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C6 H13 N O2, C6 H14 N O2 +, C6 H2 N3 O7 -'
_chemical_formula_moiety         'C6 H13 N O2, C6 H14 N O2 +, C6 H2 N3 O7 -'
_chemical_formula_sum            'C18 H29 N5 O11'
_chemical_formula_weight         491.46
_chemical_name_common
;
L-Leucine L-leucinium picrate
;
_chemical_name_systematic
;
L-Leucine L-leucinium picrate
;
_space_group_IT_number           1
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  'P 1'
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                106.45(2)
_cell_angle_beta                 95.170(10)
_cell_angle_gamma                91.02(2)
_cell_formula_units_Z            2
_cell_length_a                   7.1470(5)
_cell_length_b                   11.8540(8)
_cell_length_c                   15.4560(10)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      13.91
_cell_measurement_theta_min      10.40
_cell_volume                     1249.4(2)
_computing_cell_refinement       'CAD-4 EXPRESS'
_computing_data_collection       'CAD-4 EXPRESS (Enraf--Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics
'PLATON (Spek, 2003) and SHELXTL/PC (Sheldrick, 1990)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Nonius MACH3 sealed tube'
_diffrn_measurement_method       \w-2\q
_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  0.0148
_diffrn_reflns_av_sigmaI/netI    0.0299
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            5538
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         2.56
_diffrn_standards_decay_%        1
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_T_max  0.987
_exptl_absorpt_correction_T_min  0.981
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>, 1968)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.306
_exptl_crystal_density_meas      1.297
_exptl_crystal_density_method
'flotation in a mixture of carbon tetracholride and xylene'
_exptl_crystal_description       plate
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.379
_refine_diff_density_min         -0.501
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     609
_refine_ls_number_reflns         4392
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0719
_refine_ls_R_factor_gt           0.0507
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0871P)^2^+0.3632P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1353
_refine_ls_wR_factor_ref         0.1495
_reflns_number_gt                3495
_reflns_number_total             4392
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt6660.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (8
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (12
times).

'_geom_torsion_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (34 times).

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (8
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (12
times).

'_geom_torsion_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (34 times).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1249.5(2)
_cod_database_code               2205871
_cod_database_fobs_code          2205871