[chem] corrections & addition on chiral molecules

diff --git a/chem/organic-2.md b/chem/organic-2.md
index 56164160ff22d089d0187c5373bebe29adfd5b24..f47f267bb321b768a79ff6a6fcbd51b0be95c41d 100644 (file)
--- a/chem/organic-2.md
+++ b/chem/organic-2.md
@@ -64,6 +64,12 @@ Alkynes: \ce{C_{$n$} H_{$2n-2$}}
     + **Cis** - same horizontal plane (symmetrical)
     + **Trans** - diagonal (asymmetrical)
 
+### Chiral molecules
+
+- Not superimposable
+- Four different groups on C atom
+- Also called enantiomers
+
 \begin{center}\setlength\tabcolsep{1cm}
 \begin{tabularx}{0.5\textwidth}{cc}
   cis & trans \\
@@ -73,7 +79,7 @@ Alkynes: \ce{C_{$n$} H_{$2n-2$}}
 
 ## Flash point
 
-Lowest temperature at which the liquid gives off enough vapour to be ignited. Flammable $\implies$ flash point > 37.8 \degree C.
+Lowest temperature at which the liquid gives off enough vapour to be ignited. Flammable $\implies$ flash point < 37.8 \degree C.
 
 ## Reactions