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_7227639
_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            'C11 H15 Cl7 N Nb O'
_chemical_formula_weight         518.30
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-11-24 deposited with the CCDC.
2017-01-30 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.9864(4)
_cell_length_b                   12.7821(7)
_cell_length_c                   20.9934(11)
_cell_measurement_reflns_used    9989
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      33.820
_cell_measurement_theta_min      2.511
_cell_volume                     1874.73(18)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CMOS detector'
_diffrn_measurement_method       'phi and omega scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0312
_diffrn_reflns_av_unetI/netI     0.0191
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            23104
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.043
_diffrn_reflns_theta_max         25.043
_diffrn_reflns_theta_min         1.865
_exptl_absorpt_coefficient_mu    1.635
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.836
_exptl_crystal_description       prism
_exptl_crystal_F_000             1024
_exptl_crystal_size_max          0.140
_exptl_crystal_size_mid          0.110
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.372
_refine_diff_density_min         -0.692
_refine_diff_density_rms         0.121
_refine_ls_abs_structure_details
;
 Flack x determined using 1278 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.03(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.214
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     195
_refine_ls_number_reflns         3338
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.214
_refine_ls_R_factor_all          0.0268
_refine_ls_R_factor_gt           0.0249
_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^)+(0.0247P)^2^+1.3304P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0570
_refine_ls_wR_factor_ref         0.0575
_reflns_Friedel_coverage         0.722
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                3197
_reflns_number_total             3338
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ra00073a2.cif
_cod_data_source_block           5a
_cod_database_code               7227639
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.803
_shelx_estimated_absorpt_t_max   0.880
_shelx_res_checksum              22538