Structure-directing weak phosphoryl <i>X</i>H···O=P (<i>X</i> = C, N) hydrogen bonds in cyclic oxazaphospholidines and oxazaphosphinanes
van der Lee, A.; Rolland, M.; Marat, X.; Virieux, D.; Volle, J.-N.; Pirat, J.-L.; Acta Crystallographica Section B 64 (2008) 196–205; doi:10.1107/S0108768107061770

data_2104072
_publ_section_title
;
 Structure-directing weak phosphoryl
 <i>X</i>H&#x00B7;&#x00B7;&#x00B7;O=P (<i>X</i> = C, N) hydrogen bonds
 in cyclic oxazaphospholidines and oxazaphosphinanes
;
_journal_coeditor_code           GP5020
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              196
_journal_page_last               205
_journal_paper_doi               10.1107/S0108768107061770
_journal_volume                  64
_journal_year                    2008
_chemical_formula_moiety         'C20 H26 N O2 P'
_chemical_formula_sum            'C20 H26 N O2 P'
_chemical_formula_weight         343.39
_chemical_name_systematic
;
(2R,4S,5R)-3-tert-butyl-2-ethyl-4,5-diphenyl-
[1,3,2]-oxazaphospholidine2-oxide
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_method           CRYSTALS_ver_12.84
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   10.5381(8)
_cell_length_b                   15.7519(14)
_cell_length_c                   22.626(2)
_cell_measurement_reflns_used    9727
_cell_measurement_temperature    120
_cell_measurement_theta_max      15.52
_cell_measurement_theta_min      2.54
_cell_volume                     3755.8(6)
_computing_cell_refinement       'SAINT (Siemens ,1995)'
_computing_data_collection       'SMART (Siemens, 1993)'
_computing_data_reduction        'SAINT (Siemens ,1995)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      120
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker SMART'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.50606
_diffrn_reflns_av_R_equivalents  0.072
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            22025
_diffrn_reflns_theta_full        20.170
_diffrn_reflns_theta_max         20.794
_diffrn_reflns_theta_min         1.221
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.066
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.89
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Siemens, 1996)'
_exptl_crystal_colour            'translucent pale white'
_exptl_crystal_density_diffrn    1.215
_exptl_crystal_description       needle
_exptl_crystal_F_000             1472
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.36
_refine_diff_density_min         -0.67
_refine_ls_extinction_coef       8606.704
_refine_ls_extinction_method     'Larson (1970), Equation 22'
_refine_ls_goodness_of_fit_ref   0.9846
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         4671
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0620
_refine_ls_R_factor_gt           0.0515
_refine_ls_shift/su_max          0.000621
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982)
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)]
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax
 Method = Robust Weighting (Prince, 1982)
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^
 A~i~ are:
 0.490 0.521 0.215
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0630
_refine_ls_wR_factor_gt          0.0517
_refine_ls_wR_factor_ref         0.0517
_reflns_number_gt                4671
_reflns_number_total             6228
_reflns_threshold_expression     I>2.0\s(I)
_cod_data_source_file            gp5020.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P b c a '
_cod_database_code               2104072