# Electronic Supplementary Material (ESI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2016

####################################################################### 
# 
# This file contains crystal structure data downloaded from the 
# Cambridge Structural Database (CSD) hosted by the Cambridge 
# Crystallographic Data Centre (CCDC).
# 
# Full information about CCDC data access policies and citation 
# guidelines are available at http://www.ccdc.cam.ac.uk/access/V1 
# 
# Audit and citation data items may have been added by the CCDC. 
# Please retain this information to preserve the provenance of 
# this file and to allow appropriate attribution of the data. 
# 
#######################################################################

data_shelxl
_database_code_depnum_ccdc_archive 'CCDC 1473985'
_audit_update_record             
;
2016-04-14 deposited with the CCDC.
2016-06-10 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2013
_chemical_name_systematic        
'(E)-ethyl 4-(naphthalen-2-yl)-2-nitro-4-oxo-3-(piperidin-1-yl)but-2-enoate'
_chemical_name_common            ?
_chemical_melting_point          417-418
_chemical_formula_moiety         ?
_chemical_formula_sum            'C21 H22 N2 O5'
_chemical_formula_weight         382.40

loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_H-M_alt        'P 21/n'
_space_group_name_Hall           '-P 2yn'

_shelx_space_group_comment       
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;

loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x+1/2, y+1/2, -z+1/2'
'-x, -y, -z'
'x-1/2, -y-1/2, z-1/2'

_cell_length_a                   14.2787(9)
_cell_length_b                   9.4954(4)
_cell_length_c                   14.5637(8)
_cell_angle_alpha                90
_cell_angle_beta                 98.003(5)
_cell_angle_gamma                90
_cell_volume                     1955.34(18)
_cell_formula_units_Z            4
_cell_measurement_temperature    290(2)
_cell_measurement_reflns_used    2038
_cell_measurement_theta_min      3.5580
_cell_measurement_theta_max      22.7070

_exptl_crystal_description       plate
_exptl_crystal_colour            ' yellow '
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_density_diffrn    1.299
_exptl_crystal_F_000             808
_exptl_transmission_factor_min   ?
_exptl_transmission_factor_max   ?
_exptl_crystal_size_max          0.360
_exptl_crystal_size_mid          0.350
_exptl_crystal_size_min          0.300
_exptl_absorpt_coefficient_mu    0.093
_shelx_estimated_absorpt_T_min   0.967
_shelx_estimated_absorpt_T_max   0.972
_exptl_absorpt_correction_T_min  0.88355
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35 (release 13-08-2014 CrysAlis171 .NET)
(compiled Aug 13 2014,18:06:01)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;

_exptl_special_details           
;
 ?
;

_diffrn_ambient_temperature      290(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_measurement_device_type  'Gemini S Ultra, Agilent Technologies'
_diffrn_measurement_method       'ω scans'
_diffrn_detector_area_resol_mean 15.9149
_diffrn_reflns_number            11149
_diffrn_reflns_av_unetI/netI     0.0473
_diffrn_reflns_av_R_equivalents  0.0361
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_theta_min         3.548
_diffrn_reflns_theta_max         26.371
_diffrn_reflns_theta_full        25.242
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measured_fraction_theta_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_point_group_measured_fraction_full 0.998
_reflns_number_total             3993
_reflns_number_gt                2582
_reflns_threshold_expression     'I > 2σ(I)'
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_max     .
_reflns_Friedel_fraction_full    .

_reflns_special_details          
;
 Reflections were merged by SHELXL according to the crystal
 class for the calculation of statistics and refinement.
 
 _reflns_Friedel_fraction is defined as the number of unique
 Friedel pairs measured divided by the number that would be
 possible theoretically, ignoring centric projections and
 systematic absences.
;

_computing_data_collection       'CrysAlisPro (Agilent Technologies)'
_computing_cell_refinement       'CrysAlisPro (Agilent Technologies)'
_computing_data_reduction        'CrysAlisPro (Agilent Technologies)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_molecular_graphics    'Ortep-3 (L. J. Farrugia, 2001)'
_computing_publication_material  SHELXL-2013

_refine_special_details          
;
 ?
;
_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'w=1/[σ²(Fo²)+(0.0945P)²+0.8826P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     ?
_atom_sites_solution_secondary   ?
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    constr
_refine_ls_extinction_method     none
_refine_ls_extinction_coef       .
_refine_ls_number_reflns         3993
_refine_ls_number_parameters     254
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0990
_refine_ls_R_factor_gt           0.0575
_refine_ls_wR_factor_ref         0.2113
_refine_ls_wR_factor_gt          0.1511
_refine_ls_goodness_of_fit_ref   1.067
_refine_ls_restrained_S_all      1.067
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
O1 O 0.65629(15) -0.1690(2) 0.31294(15) 0.0767(7) Uani 1 1 d . . . . .
O5 O 0.73157(14) 0.0327(2) 0.04791(14) 0.0706(6) Uani 1 1 d . . . . .
N1 N 0.62107(14) 0.1271(2) 0.20065(14) 0.0472(5) Uani 1 1 d . . . . .
O2 O 0.51312(18) -0.2533(2) 0.1538(2) 0.0896(8) Uani 1 1 d . . . . .
O3 O 0.5994(2) -0.3093(2) 0.05041(18) 0.0936(9) Uani 1 1 d . . . . .
C1 C 0.50468(19) -0.0705(3) 0.31642(17) 0.0482(6) Uani 1 1 d . . . . .
C9 C 0.34724(19) 0.0291(3) 0.31048(18) 0.0506(6) Uani 1 1 d . . . . .
C12 C 0.60822(16) -0.0114(3) 0.18926(17) 0.0424(6) Uani 1 1 d . . . . .
N2 N 0.57187(18) -0.2227(2) 0.10331(17) 0.0587(6) Uani 1 1 d . . . . .
C10 C 0.43338(18) 0.0129(3) 0.27368(17) 0.0481(6) Uani 1 1 d . . . . .
H10 H 0.4417 0.0599 0.2194 0.058 Uiso 1 1 calc R U . . .
C4 C 0.3345(2) -0.0451(3) 0.3921(2) 0.0595(7) Uani 1 1 d . . . . .
C11 C 0.59347(19) -0.0931(3) 0.27736(19) 0.0505(6) Uani 1 1 d . . . . .
C13 C 0.61022(17) -0.0848(3) 0.10797(18) 0.0465(6) Uani 1 1 d . . . . .
C14 C 0.6108(2) 0.2299(3) 0.1242(2) 0.0573(7) Uani 1 1 d . . . . .
H14A H 0.5812 0.1851 0.0676 0.069 Uiso 1 1 calc R U . . .
H14B H 0.6726 0.2635 0.1139 0.069 Uiso 1 1 calc R U . . .
O4 O 0.6183(2) -0.0680(3) -0.05269(16) 0.1026(10) Uani 1 1 d . . . . .
C5 C 0.2466(3) -0.0319(4) 0.4265(3) 0.0779(10) Uani 1 1 d . . . . .
H5 H 0.2367 -0.0807 0.4797 0.094 Uiso 1 1 calc R U . . .
C19 C 0.6517(2) -0.0418(3) 0.0251(2) 0.0592(7) Uani 1 1 d . . . . .
C18 C 0.6571(2) 0.1884(3) 0.2921(2) 0.0623(8) Uani 1 1 d . . . . .
H18A H 0.7218 0.2193 0.2920 0.075 Uiso 1 1 calc R U . . .
H18B H 0.6571 0.1166 0.3395 0.075 Uiso 1 1 calc R U . . .
C8 C 0.2735(2) 0.1156(4) 0.2678(2) 0.0669(8) Uani 1 1 d . . . . .
H8 H 0.2816 0.1664 0.2148 0.080 Uiso 1 1 calc R U . . .
C2 C 0.4919(2) -0.1423(3) 0.3987(2) 0.0703(9) Uani 1 1 d . . . . .
H2 H 0.5401 -0.1985 0.4285 0.084 Uiso 1 1 calc R U . . .
C17 C 0.5978(3) 0.3118(3) 0.3155(2) 0.0795(10) Uani 1 1 d . . . . .
H17A H 0.6265 0.3541 0.3732 0.095 Uiso 1 1 calc R U . . .
H17B H 0.5352 0.2789 0.3239 0.095 Uiso 1 1 calc R U . . .
C6 C 0.1776(3) 0.0503(4) 0.3831(3) 0.0802(10) Uani 1 1 d . . . . .
H6 H 0.1204 0.0571 0.4065 0.096 Uiso 1 1 calc R U . . .
C15 C 0.5504(3) 0.3534(3) 0.1479(3) 0.0756(9) Uani 1 1 d . . . . .
H15A H 0.5474 0.4232 0.0989 0.091 Uiso 1 1 calc R U . . .
H15B H 0.4866 0.3207 0.1510 0.091 Uiso 1 1 calc R U . . .
C3 C 0.4086(3) -0.1292(4) 0.4344(2) 0.0781(10) Uani 1 1 d . . . . .
H3 H 0.4011 -0.1777 0.4883 0.094 Uiso 1 1 calc R U . . .
C7 C 0.1905(2) 0.1253(4) 0.3037(3) 0.0794(10) Uani 1 1 d . . . . .
H7 H 0.1421 0.1824 0.2750 0.095 Uiso 1 1 calc R U . . .
C20 C 0.7720(3) 0.1075(5) -0.0260(3) 0.1067(15) Uani 1 1 d . . . . .
H19A H 0.7288 0.1003 -0.0834 0.128 Uiso 1 1 calc R U . . .
H19B H 0.7790 0.2064 -0.0099 0.128 Uiso 1 1 calc R U . . .
C16 C 0.5893(3) 0.4213(4) 0.2392(3) 0.0905(12) Uani 1 1 d . . . . .
H16A H 0.5476 0.4965 0.2532 0.109 Uiso 1 1 calc R U . . .
H16B H 0.6510 0.4617 0.2349 0.109 Uiso 1 1 calc R U . . .
C21 C 0.8606(3) 0.0523(6) -0.0395(4) 0.1209(17) Uani 1 1 d . . . . .
H20A H 0.8864 0.1074 -0.0852 0.181 Uiso 1 1 calc R U . . .
H20B H 0.8530 -0.0434 -0.0604 0.181 Uiso 1 1 calc R U . . .
H20C H 0.9027 0.0553 0.0179 0.181 Uiso 1 1 calc R U . . .


_geom_special_details            
;
 All esds (except the esd in the dihedral angle between two l.s. planes)
 are estimated using the full covariance matrix.  The cell esds are taken
 into account individually in the estimation of esds in distances, angles
 and torsion angles; correlations between esds in cell parameters are only
 used when they are defined by crystal symmetry.  An approximate (isotropic)
 treatment of cell esds is used for estimating esds involving l.s. planes.
;

loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
O1 C11 1.210(3) . ?
O5 C19 1.343(4) . ?
O5 C20 1.472(4) . ?
N1 C12 1.334(3) . ?
N1 C14 1.473(3) . ?
N1 C18 1.478(3) . ?
O2 N2 1.224(3) . ?
O3 N2 1.228(3) . ?
C1 C10 1.369(4) . ?
C1 C2 1.412(4) . ?
C1 C11 1.476(4) . ?
C9 C8 1.410(4) . ?
C9 C4 1.415(4) . ?
C9 C10 1.417(4) . ?
C12 C13 1.378(4) . ?
C12 C11 1.539(3) . ?
N2 C13 1.418(3) . ?
C10 H10 0.9300 . ?
C4 C3 1.399(5) . ?
C4 C5 1.420(4) . ?
C13 C19 1.475(4) . ?
C14 C15 1.523(4) . ?
C14 H14A 0.9700 . ?
C14 H14B 0.9700 . ?
O4 C19 1.192(4) . ?
C5 C6 1.343(5) . ?
C5 H5 0.9300 . ?
C18 C17 1.512(5) . ?
C18 H18A 0.9700 . ?
C18 H18B 0.9700 . ?
C8 C7 1.365(4) . ?
C8 H8 0.9300 . ?
C2 C3 1.368(4) . ?
C2 H2 0.9300 . ?
C17 C16 1.515(5) . ?
C17 H17A 0.9700 . ?
C17 H17B 0.9700 . ?
C6 C7 1.392(5) . ?
C6 H6 0.9300 . ?
C15 C16 1.512(5) . ?
C15 H15A 0.9700 . ?
C15 H15B 0.9700 . ?
C3 H3 0.9300 . ?
C7 H7 0.9300 . ?
C20 C21 1.408(6) . ?
C20 H19A 0.9700 . ?
C20 H19B 0.9700 . ?
C16 H16A 0.9700 . ?
C16 H16B 0.9700 . ?
C21 H20A 0.9600 . ?
C21 H20B 0.9600 . ?
C21 H20C 0.9600 . ?

loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle_publ_flag
C19 O5 C20 118.6(3) . . ?
C12 N1 C14 124.1(2) . . ?
C12 N1 C18 121.6(2) . . ?
C14 N1 C18 113.9(2) . . ?
C10 C1 C2 119.3(3) . . ?
C10 C1 C11 122.2(2) . . ?
C2 C1 C11 118.4(2) . . ?
C8 C9 C4 119.0(3) . . ?
C8 C9 C10 122.0(3) . . ?
C4 C9 C10 118.9(3) . . ?
N1 C12 C13 125.9(2) . . ?
N1 C12 C11 115.2(2) . . ?
C13 C12 C11 118.9(2) . . ?
O2 N2 O3 121.6(3) . . ?
O2 N2 C13 118.9(2) . . ?
O3 N2 C13 119.5(2) . . ?
C1 C10 C9 121.4(2) . . ?
C1 C10 H10 119.3 . . ?
C9 C10 H10 119.3 . . ?
C3 C4 C9 118.4(3) . . ?
C3 C4 C5 123.2(3) . . ?
C9 C4 C5 118.4(3) . . ?
O1 C11 C1 123.1(2) . . ?
O1 C11 C12 118.6(2) . . ?
C1 C11 C12 118.2(2) . . ?
C12 C13 N2 117.0(2) . . ?
C12 C13 C19 128.5(2) . . ?
N2 C13 C19 114.4(2) . . ?
N1 C14 C15 109.8(2) . . ?
N1 C14 H14A 109.7 . . ?
C15 C14 H14A 109.7 . . ?
N1 C14 H14B 109.7 . . ?
C15 C14 H14B 109.7 . . ?
H14A C14 H14B 108.2 . . ?
C6 C5 C4 120.8(3) . . ?
C6 C5 H5 119.6 . . ?
C4 C5 H5 119.6 . . ?
O4 C19 O5 124.0(3) . . ?
O4 C19 C13 124.5(3) . . ?
O5 C19 C13 111.5(2) . . ?
N1 C18 C17 111.9(3) . . ?
N1 C18 H18A 109.2 . . ?
C17 C18 H18A 109.2 . . ?
N1 C18 H18B 109.2 . . ?
C17 C18 H18B 109.2 . . ?
H18A C18 H18B 107.9 . . ?
C7 C8 C9 120.4(3) . . ?
C7 C8 H8 119.8 . . ?
C9 C8 H8 119.8 . . ?
C3 C2 C1 120.0(3) . . ?
C3 C2 H2 120.0 . . ?
C1 C2 H2 120.0 . . ?
C18 C17 C16 110.9(3) . . ?
C18 C17 H17A 109.5 . . ?
C16 C17 H17A 109.5 . . ?
C18 C17 H17B 109.5 . . ?
C16 C17 H17B 109.5 . . ?
H17A C17 H17B 108.1 . . ?
C5 C6 C7 121.0(3) . . ?
C5 C6 H6 119.5 . . ?
C7 C6 H6 119.5 . . ?
C16 C15 C14 112.2(3) . . ?
C16 C15 H15A 109.2 . . ?
C14 C15 H15A 109.2 . . ?
C16 C15 H15B 109.2 . . ?
C14 C15 H15B 109.2 . . ?
H15A C15 H15B 107.9 . . ?
C2 C3 C4 121.9(3) . . ?
C2 C3 H3 119.0 . . ?
C4 C3 H3 119.0 . . ?
C8 C7 C6 120.4(3) . . ?
C8 C7 H7 119.8 . . ?
C6 C7 H7 119.8 . . ?
C21 C20 O5 111.9(3) . . ?
C21 C20 H19A 109.2 . . ?
O5 C20 H19A 109.2 . . ?
C21 C20 H19B 109.2 . . ?
O5 C20 H19B 109.2 . . ?
H19A C20 H19B 107.9 . . ?
C15 C16 C17 109.5(3) . . ?
C15 C16 H16A 109.8 . . ?
C17 C16 H16A 109.8 . . ?
C15 C16 H16B 109.8 . . ?
C17 C16 H16B 109.8 . . ?
H16A C16 H16B 108.2 . . ?
C20 C21 H20A 109.5 . . ?
C20 C21 H20B 109.5 . . ?
H20A C21 H20B 109.5 . . ?
C20 C21 H20C 109.5 . . ?
H20A C21 H20C 109.5 . . ?
H20B C21 H20C 109.5 . . ?

loop_
_geom_torsion_atom_site_label_1
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion
_geom_torsion_site_symmetry_1
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
_geom_torsion_publ_flag
C14 N1 C12 C13 19.5(4) . . . . ?
C18 N1 C12 C13 -153.9(3) . . . . ?
C14 N1 C12 C11 -162.7(2) . . . . ?
C18 N1 C12 C11 23.8(3) . . . . ?
C2 C1 C10 C9 0.3(4) . . . . ?
C11 C1 C10 C9 177.6(2) . . . . ?
C8 C9 C10 C1 179.4(3) . . . . ?
C4 C9 C10 C1 -1.3(4) . . . . ?
C8 C9 C4 C3 -179.3(3) . . . . ?
C10 C9 C4 C3 1.4(4) . . . . ?
C8 C9 C4 C5 1.6(4) . . . . ?
C10 C9 C4 C5 -177.8(3) . . . . ?
C10 C1 C11 O1 -178.2(3) . . . . ?
C2 C1 C11 O1 -0.8(4) . . . . ?
C10 C1 C11 C12 4.3(4) . . . . ?
C2 C1 C11 C12 -178.3(3) . . . . ?
N1 C12 C11 O1 -108.3(3) . . . . ?
C13 C12 C11 O1 69.6(3) . . . . ?
N1 C12 C11 C1 69.3(3) . . . . ?
C13 C12 C11 C1 -112.7(3) . . . . ?
N1 C12 C13 N2 -164.4(2) . . . . ?
C11 C12 C13 N2 17.8(3) . . . . ?
N1 C12 C13 C19 18.9(4) . . . . ?
C11 C12 C13 C19 -158.8(3) . . . . ?
O2 N2 C13 C12 23.9(4) . . . . ?
O3 N2 C13 C12 -154.7(3) . . . . ?
O2 N2 C13 C19 -159.0(3) . . . . ?
O3 N2 C13 C19 22.4(4) . . . . ?
C12 N1 C14 C15 132.3(3) . . . . ?
C18 N1 C14 C15 -53.8(3) . . . . ?
C3 C4 C5 C6 -179.9(3) . . . . ?
C9 C4 C5 C6 -0.7(5) . . . . ?
C20 O5 C19 O4 11.1(5) . . . . ?
C20 O5 C19 C13 -168.1(3) . . . . ?
C12 C13 C19 O4 -143.1(3) . . . . ?
N2 C13 C19 O4 40.2(4) . . . . ?
C12 C13 C19 O5 36.0(4) . . . . ?
N2 C13 C19 O5 -140.7(2) . . . . ?
C12 N1 C18 C17 -131.6(3) . . . . ?
C14 N1 C18 C17 54.3(3) . . . . ?
C4 C9 C8 C7 -1.3(5) . . . . ?
C10 C9 C8 C7 178.0(3) . . . . ?
C10 C1 C2 C3 0.6(5) . . . . ?
C11 C1 C2 C3 -176.8(3) . . . . ?
N1 C18 C17 C16 -54.3(4) . . . . ?
C4 C5 C6 C7 -0.4(5) . . . . ?
N1 C14 C15 C16 55.3(4) . . . . ?
C1 C2 C3 C4 -0.5(6) . . . . ?
C9 C4 C3 C2 -0.5(5) . . . . ?
C5 C4 C3 C2 178.6(3) . . . . ?
C9 C8 C7 C6 0.2(5) . . . . ?
C5 C6 C7 C8 0.7(5) . . . . ?
C19 O5 C20 C21 -114.6(4) . . . . ?
C14 C15 C16 C17 -56.8(4) . . . . ?
C18 C17 C16 C15 55.5(4) . . . . ?

_refine_diff_density_max         0.362
_refine_diff_density_min         -0.360
_refine_diff_density_rms         0.100

_shelxl_version_number           2013-4



_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_solvent_exptl_crystal_recrystallization_method ' acetone/petroleum ether'
_chemical_properties_physical    Heat-sensitive
