verbs that come from _-latum_ consistently stress the last vowel,
as 'dilate', 'relate', 'collate'. So does 'create', because of one
vowel following another. Of the rest all the words of any rank have
the stress on the penultima, as 'vibrate', 'frustrate', 'mígrate',
'cástrate', 'púlsate', 'vácate'. Thus Pope has

The whisper, that to greatness still too near,
Perhaps, yet vibrates on his Sov'reign's ear,

and Shelley

Music, when soft voices die,
Vibrates in the memory.

There are, however, verbs of no literary account which in usage
either vary in the stress or take it on the latter syllable. Such are
'locate', 'orate', 'negate', 'placate', and perhaps 'rotate'. With
most of these we could well dispense. 'Equate' is mainly a technical
word. Dictionaries seem to prefer the stress on the ultima, but some
at least of the early Victorian mathematicians said 'équate', and the
pronunciation is to be supported. Trisyllabic verbs throw the stress
back and shorten the penultima, as 'dés[)o]late', 'súff[)o]cate',
'scínt[)i]llate'. Even words with heavy double consonants have adopted
this habit. Thus where Browning has (like Milton and Cowper)

I the Trinity illústrate
Drinking water'd orange pulp,
In three sips the Arian frustrate.
While he drains his at one gulp,