Input interpretation
4, 4'-dibromobiphenyl
Chemical names and formulas
formula | BrC_6H_4C_6H_4Br Hill formula | C_12H_8Br_2 name | 4, 4'-dibromobiphenyl IUPAC name | 1-bromo-4-(4-bromophenyl)benzene alternate names | 1, 1'-biphenyl, 4, 4'-dibromo- | 1-bromo-4-(4-bromophenyl)benzene | 4, 4'-dibromo-1, 1'-biphenyl | biphenyl, 4, 4'-dibromo- | p, p'-dibromobiphenyl mass fractions | Br (bromine) 51.2% | C (carbon) 46.2% | H (hydrogen) 2.58%
Lewis structure
Draw the Lewis structure of 4, 4'-dibromobiphenyl. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the bromine (n_Br, val = 7), carbon (n_C, val = 4), and hydrogen (n_H, val = 1) atoms: 2 n_Br, val + 12 n_C, val + 8 n_H, val = 70 Calculate the number of electrons needed to completely fill the valence shells for bromine (n_Br, full = 8), carbon (n_C, full = 8), and hydrogen (n_H, full = 2): 2 n_Br, full + 12 n_C, full + 8 n_H, full = 128 Subtracting these two numbers shows that 128 - 70 = 58 bonding electrons are needed. Each bond has two electrons, so in addition to the 23 bonds already present in the diagram add 6 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 6 bonds by pairing electrons between adjacent highlighted atoms. Note that the six atom rings are aromatic, so that the single and double bonds may be rearranged: Answer: | |
3D structure
3D structure
Basic properties
molar mass | 312 g/mol phase | solid (at STP) melting point | 164 °C boiling point | 357.5 °C density | 1.867 g/cm^3 solubility in water | insoluble
Units
Solid properties (at STP)
density | 1.867 g/cm^3 vapor pressure | 6×10^-5 mmHg (at 25 °C)
Units
Thermodynamic properties
molar heat of vaporization | 57.9 kJ/mol specific heat of vaporization | 0.1856 kJ/g (at STP)
Chemical identifiers
CAS number | 92-86-4 Beilstein number | 2044701 PubChem CID number | 7110 PubChem SID number | 24853738 SMILES identifier | C1=CC(=CC=C1C2=CC=C(C=C2)Br)Br InChI identifier | InChI=1/C12H8Br2/c13-11-5-1-9(2-6-11)10-3-7-12(14)8-4-10/h1-8H MDL number | MFCD00000101
NFPA label
NFPA label
NFPA health rating | 1 NFPA fire rating | 1 NFPA reactivity rating | 0
Safety properties
flash point | 198 °C
DOT hazard class | 9 DOT numbers | 3152