1-[(trimethylsilyl)ethynyl]-4-(trifluoromethyl)benzene

1-[(trimethylsilyl)ethynyl]-4-(trifluoromethyl)benzene

formula | C_6H_4CF_3C congruent CSi(CH_3)_3 Hill formula | C_12H_13F_3Si name | 1-[(trimethylsilyl)ethynyl]-4-(trifluoromethyl)benzene IUPAC name | trimethyl-[2-[4-(trifluoromethyl)phenyl]ethynyl]silane alternate names | [4-(trifluoromethyl)phenyl](trimethylsilyl)acetylene | trimethyl-[2-[4-(trifluoromethyl)phenyl]ethynyl]silane mass fractions | C (carbon) 59.5% | F (fluorine) 23.5% | H (hydrogen) 5.41% | Si (silicon) 11.6%

Draw the Lewis structure of 1-[(trimethylsilyl)ethynyl]-4-(trifluoromethyl)benzene. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the carbon (n_C, val = 4), fluorine (n_F, val = 7), hydrogen (n_H, val = 1), and silicon (n_Si, val = 4) atoms: 12 n_C, val + 3 n_F, val + 13 n_H, val + n_Si, val = 86 Calculate the number of electrons needed to completely fill the valence shells for carbon (n_C, full = 8), fluorine (n_F, full = 8), hydrogen (n_H, full = 2), and silicon (n_Si, full = 8): 12 n_C, full + 3 n_F, full + 13 n_H, full + n_Si, full = 154 Subtracting these two numbers shows that 154 - 86 = 68 bonding electrons are needed. Each bond has two electrons, so in addition to the 29 bonds already present in the diagram add 5 bonds. To minimize formal charge carbon wants 4 bonds. Identify the atoms that want additional bonds and the number of electrons remaining on each atom: Fill in the 5 bonds by pairing electrons between adjacent highlighted atoms. Note that the six atom ring is aromatic, so that the single and double bonds may be rearranged: Answer: | |

3D structure

molar mass | 242.32 g/mol phase | liquid (at STP) boiling point | 80 °C (measured at 13.33 Pa) density | 1.029 g/cm^3

density | 1.029 g/cm^3 refractive index | 1.476

CAS number | 40230-95-3 PubChem CID number | 4178887 PubChem SID number | 24880099 SMILES identifier | C[Si](C)(C)C#CC1=CC=C(C=C1)C(F)(F)F InChI identifier | InChI=1/C12H13F3Si/c1-16(2, 3)9-8-10-4-6-11(7-5-10)12(13, 14)15/h4-7H, 1-3H3 MDL number | MFCD03427266

flash point | 57.22 °C