Example of Hill order

HILL NOTATION

Hill notation is a standard way of writing the formula for any chemical compound.

The empirical formula for any compound is written in correct Hill notation.

EXAMPLES:

1) H₃C(CH₂)₈CH₂NH₂

First, Count All Carbon Atoms and record. C₁₀

Second, Count all Hydrogen atoms and record: C₁₀H₂₃

Third, determine all other elements in compound. Count each and record in alphabetical order. C₁₀H₂₃N

When determining counts from a structural drawing, CAREFULLY count H atoms!!

2) [(CH₃)₃Si₂]₂NNa

Counting all the Carbon atoms: C₆

Counting all the Hydrogen atoms: C₆H₁₈

Determining all the other elements in the compound. Count each and record in alphabetical order.

C₆H₁₈NNaSi₄

EXAMPLE OF HILL ORDER
taken from Gary Wiggins' book

Al₆Ca₅O₁₄
B₂O₃
B₂Zr₃
BrH
CCl₄
CHCl₃
CHNO
CNaO₃
C₂Ca
C₂H₄
C₂H₄BrCl
C₂H₅AlBr₂
C₅H₈O₂
C₈H₅NO₂
C₂₂H₂₄FN₃O₂
CaO₃Ti
H₂O₄S
H₄Sn

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msm revised 2/1/07