2-Silyloxy-1,2-oxazines, a New Type of Acetals of Conjugated Nitroso Alkenes
Alexander A. Tishkov; Alexey V. Lesiv; Yulya A. Khomutova; Yury A. Strelenko; Ivan D. Nesterov; Michael Yu. Antipin; Sema L. Ioffe; Scott E. Denmark; Journal of Organic Chemistry 68 (2003) 9477–9480; doi:10.1021/jo034669a

data_4022497
_publ_section_title
;
 2-Silyloxy-1,2-oxazines, a New Type of Acetals of
 Conjugated Nitroso Alkenes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              9477
_journal_page_last               9480
_journal_paper_doi               10.1021/jo034669a
_journal_volume                  68
_journal_year                    2003
_chemical_formula_sum            'C17 H27 N O4 Si'
_chemical_formula_weight         337.49
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 98.51(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.786(3)
_cell_length_b                   12.596(4)
_cell_length_c                   14.031(5)
_cell_measurement_reflns_used    24
_cell_measurement_temperature    163(2)
_cell_measurement_theta_max      14
_cell_measurement_theta_min      12
_cell_volume                     1885.3(10)
_computing_cell_refinement       'Siemens P3/PC (Siemens, 1989)'
_computing_data_collection       'Siemens P3/PC (Siemens, 1989)'
_computing_data_reduction        'Siemens P3/PC (Siemens, 1989)'
_computing_molecular_graphics    'SHELXTL PLUS 5 (Sheldrick, 1998)'
_computing_publication_material  'SHELXTL PLUS 5 (Sheldrick, 1998)'
_computing_structure_refinement  'SHELXTL PLUS 5 (Sheldrick, 1998)'
_computing_structure_solution    'SHELXTL PLUS 5 (Sheldrick, 1998)'
_diffrn_ambient_temperature      163(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type
'Rebuild Syntex P2~1~/Siemens P3 four-circle diffractometer'
_diffrn_measurement_method       '\q/2\q 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  0.0251
_diffrn_reflns_av_sigmaI/netI    0.0247
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            3510
_diffrn_reflns_theta_full        25.05
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         2.18
_diffrn_standards_decay_%        2
_diffrn_standards_interval_count 98
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.133
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.189
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             668
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.462
_refine_diff_density_min         -0.288
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     216
_refine_ls_number_reflns         3327
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0567
_refine_ls_R_factor_gt           0.0435
_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^)+(0.0682P)^2^+1.0450P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1154
_refine_ls_wR_factor_ref         0.1217
_reflns_number_gt                2820
_reflns_number_total             3327
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo034669asi20030519_115718.cif
_cod_data_source_block           asena
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4022497