An acyl /ˈæsɪl/ group is a functional group derived by the removal of one or more hydroxyl groups from an oxoacid, including inorganic acids. It contains a double bonded oxygen atom and an alkyl group.
In organic chemistry, the acyl group (IUPAC name: alkanoyl) is usually derived from a carboxylic acid. Therefore, it has the formula RCO-, where R represents an alkyl group that is attached to the CO group with a single bond. Although the term is almost always applied to organic compounds, acyl groups can in principle be derived from other types of acids such as sulfonic acids, phosphonic acids. In the most common arrangement, acyl groups are attached to a larger molecular fragment, in which case the carbon and oxygen atoms are linked by a double bond.
Well-known acyl compounds are the acyl chlorides, such as acetyl chloride (CH3COCl) and benzoyl chloride (C6H5COCl). These compounds, which are treated as sources of acylium cations, are good reagents for attaching acyl groups to various substrates. Amides (RC(O)NR2) and esters (RC(O)OR’) are classes of acyl compounds, as are ketones (RC(O)R) and aldehydes (RC(O)H).
There's a house down on the corner
That we always used to talk about
Never had the guts to go inside
Not even on a dare
Boarded up and creepy
Scary eyes looked out upon a sleepy town
Fascination kept us guessin'
Why the sign read to beware?
We always knew just
What would hit the fan
If we got an up close look
At the boogie man
Shadows on the wall
Voices in the hall, oh, yeah
There's more than just a mouse
In the Zavelow House
Zavelow, Zavelow, Zavelow, yo
I could look inside the window
If I jumped upon my trampoline
Could've sworn I saw Hannibal Lichter
With a hatchet and a head
Not the kind of place you'd see
In Better Homes and Gardens magazine
Unless they did an expose
On the night of the living dead
But with a pretty girl
To hold my hand
Could've got an up close look
At the boogie man
Yeah, shadows on the wall
Voices in the hall, oh, yeah
There's more than just a mouse
In the Zavelow House
Oh, Zavelow, woah
But with a pretty girl
To hold my hand
Could've got an up close look
At the boogie man
Yeah, shadows on the wall
Voices in the hall, oh, yeah
There's more than just a mouse
In the Zavelow House
Yeah, shadows on the wall
Voices in the hall, oh, yeah
There's more than just a mouse
In the Zavelow House
(Zavelow, Zavelow, Zavelow)