A Proton Relay Process as the Mechanism of Activation of the Histamine H3-Receptor Determined by 1H NMR and ab Initio Quantum Mechanical Calculations
Jari T. Kovalainen; Johannes A. M. Christiaans; Risto Ropponen; Antti Poso; Mikael Peräkylä; Jouko Vepsäläinen; Reino Laatikainen; Jukka Gynther; Journal of the American Chemical Society 122 (2000) 6989–6996; doi:10.1021/ja993322f

data_4116101
_publ_contact_author             'Kovalainen, Jari'
_publ_contact_author_email       kovalain@mail.uku.fi
_publ_section_title
;
 A Proton Relay Process as the Mechanism of Activation of the Histamine
 H3-Receptor Determined by 1H NMR and ab Initio Quantum Mechanical
 Calculations
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6989
_journal_page_last               6996
_journal_paper_doi               10.1021/ja993322f
_journal_volume                  122
_journal_year                    2000
_chemical_formula_sum            'C13 H25 Cl2 N3 O'
_chemical_formula_weight         310.26
_chemical_name_systematic
;
2(S)-amino-3-(1H-imidazol-4(5)-yl)propyl cyclohexylmethyl ether dihydrochloride
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   7.827(1)
_cell_length_b                   12.774(1)
_cell_length_c                   17.353(1)
_cell_measurement_temperature    173(2)
_cell_volume                     1735.0(3)
_computing_cell_refinement       Denzo
_computing_data_collection       Collect
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SHELXS-97
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_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  0.070
_diffrn_reflns_av_sigmaI/netI    0.0883
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            27791
_diffrn_reflns_theta_full        27.89
_diffrn_reflns_theta_max         27.89
_diffrn_reflns_theta_min         3.05
_exptl_absorpt_coefficient_mu    0.372
_exptl_absorpt_correction_T_max  0.9638
_exptl_absorpt_correction_T_min  0.9128
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.188
_exptl_crystal_density_meas      ?
_exptl_crystal_description       block
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.191
_refine_diff_density_min         -0.272
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.13(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         4088
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0932
_refine_ls_R_factor_gt           0.0492
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0286P)^2^+0.0978P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0810
_refine_ls_wR_factor_ref         0.0923
_reflns_number_gt                2914
_reflns_number_total             4088
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja993322f_1.cif
_cod_data_source_block           8
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_database_code               4116101