Note g-Note that this usage of the terms primary, secondary, and tertiary is different from our previous usage. e a When we speak of a tertiary alcohol or alkyl halide, we refer to the degree of substitution at the alkyl carbon atom a When we speak of a tertiary amine, however, we refer to the degree of substitution at the nitrogen atomOrganic Chemistry Organic Chemistry Xiamen Xiamen University University Note „ Note that this usage of the terms primary, secondary, and tertiary is different from our previous usage. „ When we speak of a tertiary alcohol or alkyl halide, we refer to the degree of substitution at the alkyl carbon atom. „ When we speak of a tertiary amine, however, we refer to the degree of substitution at the nitrogen atom