What is the name of #CuBr#?

2 Answers
Jan 30, 2017

Copper Bromide. or Copper I Bromide.


Copper has oxidation numbers of +1 or +2
Bromide has a common charge of -1

This can be called Copper I bromide more precisely .or somewhat redudanately Copper mono bromide.

An older form of naming would be Cupous Bromide. Indicating a +1 charge on Copper. Cupric Bromide would be # CuBr_2# indicating a + 2 charge.

Feb 10, 2017

The name is copper(I) bromide.


#"CuCl"# is a compound of a metal and a nonmetal, so we name it using the rules for ionic compounds.

The name follows the general form

name-of-metal stem-of-nonmetal + -ide

The stem of the nonmetal is brom-, so the second part of the name is bromide

The charge on the bromide ion is -1, so the copper ion has a charge of +1.

We write the charge as a Roman numeral in parentheses immediately after the name of the metal (no spaces).

The name of the metal ion is copper(I).

The complete name is copper(I) bromide.