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Why is bezaldehyde; benzaldehyde not phenyldehyde

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    Hi guys and girls, I was just thinking about why bezaldehyde is benzaldehyde not phenyldehyde. My teacher told me if you need to differentiate between a phenyl and a bezyl is that benzyl will have a carbon inbetween .. can anybody help me solve this i got confuse or correct me
    If we draw bezaldehye there is no carboninbetween so surely its phenaldehyde (if that exists)

    Thank you for your help and time

    Phenyl = C6H5-
    Benzyl = C6H5CH2-

    So basically, benzyl = phenyl + 1 carbon

    Benzaldehyde = C6H5CHO

    To put it another way an alternate name of benzaldehyde is phenylmethanal
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