Hydrogen bond architecture in crystal structures of N-alkylated hydrophobic amino acids
Görbitz, C. H.; Leirvåg, A. B.; Jacobsen, Ø.; CrystEngComm 16 (2014) 9631–; doi:10.1039/C4CE01412J

data_7217856
_publ_section_title
;
 Hydrogen bond architecture in crystal structures of N-alkylated
 hydrophobic amino acids
;
_journal_issue                   41
_journal_name_full               CrystEngComm
_journal_page_first              9631
_journal_paper_doi               10.1039/C4CE01412J
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C8 H17 N O2'
_chemical_formula_sum            'C8 H17 N O2'
_chemical_formula_weight         159.23
_chemical_name_systematic
; 
 N-isopropyl-L-valine 
;
_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                 101.676(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.378(2)
_cell_length_b                   9.788(4)
_cell_length_c                   8.399(3)
_cell_measurement_reflns_used    1589
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.45
_cell_measurement_theta_min      2.48
_cell_volume                     433.0(3)
_computing_cell_refinement       'SAINT-Plus (Bruker, 2007)'
_computing_data_collection       'APEX2(Bruker, 2007)'
_computing_data_reduction        'SAINT-Plus (Bruker, 2007)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.916
_diffrn_measurement_device_type  'APEX II'
_diffrn_measurement_method
'Sets of exposures each taken over 0.5\% \w rotaton'
_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  0.0478
_diffrn_reflns_av_sigmaI/netI    0.0435
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2597
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.45
_diffrn_reflns_theta_min         2.48
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  0.9711
_exptl_absorpt_correction_T_min  0.6406
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2007)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.221
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             176
_exptl_crystal_size_max          0.750
_exptl_crystal_size_mid          0.650
_exptl_crystal_size_min          0.340
_refine_diff_density_max         0.335
_refine_diff_density_min         -0.232
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.090
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     104
_refine_ls_number_reflns         1051
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.090
_refine_ls_R_factor_all          0.0522
_refine_ls_R_factor_gt           0.0455
_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^)+(0.0810P)^2^+0.0690P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1245
_refine_ls_wR_factor_ref         0.1304
_reflns_number_gt                939
_reflns_number_total             1051
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ce01412j2.cif
_cod_data_source_block           nipv3
_cod_depositor_comments
'Adding full bibliography for 7217856--7217860.cif.'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7217856