The reactions of α-amino acids and α-amino acid esters with high valent transition metal halides: synthesis of coordination complexes, activation processes and stabilization of α-ammonium acylchloride cations
Biancalana, Lorenzo; Bortoluzzi, Marco; Ferretti, Eleonora; Hayatifar, Mohammad; Marchetti, Fabio; Pampaloni, Guido; Zacchini, Stefano; RSC Adv. 7 (2017) 10158–; doi:10.1039/C7RA00073A

data_7227641
_publ_section_title
;
 The reactions of \a-amino acids and \a-amino acid esters with high valent
 transition metal halides: synthesis of coordination complexes, activation
 processes and stabilization of \a-ammonium acylchloride cations
;
_journal_issue                   17
_journal_name_full               'RSC Adv.'
_journal_page_first              10158
_journal_paper_doi               10.1039/C7RA00073A
_journal_volume                  7
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_sum            'C7 H16 Cl11 N Nb2 O2'
_chemical_formula_weight         721.98
_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
_audit_update_record
;
2016-11-24 deposited with the CCDC.
2017-01-30 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 106.428(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.045(2)
_cell_length_b                   6.9628(17)
_cell_length_c                   16.994(4)
_cell_measurement_reflns_used    6141
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.2995
_cell_measurement_theta_min      2.499
_cell_volume                     1140.1(4)
_computing_cell_refinement       'APEX2 (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2006)'
_computing_data_reduction        'SAINT (Bruker AXS, 2004)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1996)'
_computing_publication_material  'XCIF (Bruker AXS, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0312
_diffrn_reflns_av_unetI/netI     0.0397
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            11566
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.25
_exptl_absorpt_coefficient_mu    2.297
_exptl_absorpt_correction_T_max  0.7393
_exptl_absorpt_correction_T_min  0.6441
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
; 
 Data were corrected for Lorentz polarization and absorption
 effects (empirical absorption correction SADABS).
 R(int) =  0.1337 (selected reflections only, before parameter refinement)
 R(int) =  0.0514 (selected reflections only, after parameter refinement)
;
_exptl_crystal_colour            pale-yellow
_exptl_crystal_density_diffrn    2.103
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             700
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.286
_refine_diff_density_min         -0.360
_refine_diff_density_rms         0.069
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         4492
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0239
_refine_ls_R_factor_gt           0.0217
_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^)+(0.0092P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0420
_refine_ls_wR_factor_ref         0.0428
_reflns_number_gt                4290
_reflns_number_total             4492
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ra00073a2.cif
_cod_data_source_block           12
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_cell_volume        1140.2(5)
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7227641