Adjusting the Structure of 2'-Modified Nucleosides and Oligonucleotides via C4'-α-F or C4'-α-OMe Substitution: Synthesis and Conformational Analysis.
Malek-Adamian, Elise; Patrascu, Mihai Burai; Jana, Sunit Kumar; Martínez-Montero, Saúl; Moitessier, Nicolas; Damha, Masad J.; The Journal of organic chemistry 83 (2018) 9839–9849; doi:10.1021/acs.joc.8b01329

data_4035101
_publ_section_title
;
 Adjusting the Structure of 2'-Modified Nucleosides and Oligonucleotides
 via C4'-\a-F or C4'-\a-OMe Substitution: Synthesis and Conformational
 Analysis.
;
_journal_issue                   17
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              9839
_journal_page_last               9849
_journal_paper_doi               10.1021/acs.joc.8b01329
_journal_volume                  83
_journal_year                    2018
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C9 H10 F2 N2 O5'
_chemical_formula_sum            'C9 H10 F2 N2 O5'
_chemical_formula_weight         264.19
_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'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2017-04-24
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5335)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.3809(2)
_cell_length_b                   9.3938(3)
_cell_length_c                   20.0221(6)
_cell_measurement_reflns_used    9896
_cell_measurement_temperature    150
_cell_measurement_theta_max      60.601
_cell_measurement_theta_min      3.842
_cell_volume                     1012.06(6)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_collection
;
APEX 2 (2013) Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      150
_diffrn_detector                 'CMOS Area detector'
_diffrn_detector_area_resol_mean 10.24
_diffrn_detector_type            'Bruker Photon 100 CMOS Detector'
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device       'k-geometry diffractometer'
_diffrn_measurement_device_type  'Bruker Venture Metaljet'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_collimation    'Focusing mirrors'
_diffrn_radiation_monochromator  'Helios MX Mirror Optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           GaK\a
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0326
_diffrn_reflns_av_unetI/netI     0.0221
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            14992
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         60.570
_diffrn_reflns_theta_min         3.841
_diffrn_source                   'Metal Jet'
_diffrn_source_target            Ga
_diffrn_source_type              'Gallium Liquid Metal Jet Source'
_exptl_absorpt_coefficient_mu    0.930
_exptl_absorpt_correction_T_max  0.7519
_exptl_absorpt_correction_T_min  0.6802
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction. wR2(int) was 0.1272 before and 0.0587 after correction. The Ratio of minimum to maximum transmission is 0.9046. The \l/2 correction factor is 0.00150.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.734
_exptl_crystal_description       PLATE
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.08
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.315
_refine_diff_density_min         -0.208
_refine_diff_density_rms         0.061
_refine_ls_abs_structure_details
;
 Flack x determined using 869 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.09(5)
_refine_ls_extinction_coef       0.0162(12)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     176
_refine_ls_number_reflns         2291
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0295
_refine_ls_R_factor_gt           0.0266
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0330P)^2^+0.3031P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0640
_refine_ls_wR_factor_ref         0.0648
_reflns_Friedel_coverage         0.683
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.991
_reflns_number_gt                2206
_reflns_number_total             2291
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b01329_si_002.cif
_cod_data_source_block           damh16
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_diffrn_radiation_probe' value 'X-ray' was changed to
'x-ray' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_database_code               4035101
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.973
_shelx_estimated_absorpt_t_min   0.929
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Ternary CH refined with riding coordinates:
 C1(H1), C2(H2B), C3(H3A)
2.b Secondary CH2 refined with riding coordinates:
 C5(H5A,H5B)
2.c Aromatic/amide H refined with riding coordinates:
 C6(H6), C7(H7)
;
_shelx_res_checksum              71949
_shelx_hkl_checksum              77387
_olex2_submission_special_instructions 'No special instructions were received'