Electrophilic addition to alkenes takes the following general form: nuc: = nucleophile E+ = electrophile. Electrophilic addition to alkenes starts with the pi electrons attacking an electrophile, forming a carbocation on the most stable carbon.A nucleophile then attacks the carbocation to form the product. There are many different kinds of such addition, including:lectrophilic addition to alkenes takes the following general form: nuc: = nucleophile E+ = electrophile. Electrophilic addition to alkenes starts with the pi electrons attacking an electrophile, forming a carbocation on the most stable carbon.
Selective auditory attention or selective hearing is a type of selective attention and involves the auditory system of the nervous system.
Nine out of ten people with SSHL lose hearing in only one ear. SSHL is diagnosed by conducting a hearing test. If the test shows a loss of at least 30 decibels (decibels are a measure of sound) in three connected frequencies (frequency is a measure of pitchâhigh to low), the hearing loss is diagnosed as SSHL. As an example, a hearing loss of 30 decibels would make conversational speech sound more like a whisper.