anti-W(CO)
5-compl
ex
ed 9-m
ethyl-9-phosphabicyclo[6.1.0]nonatri
en
e r
epr
es
ents a coval
entlyint
erlock
ed mol
ecular b
ev
el g
ear. Corr
elat
ed mov
em
ent of th
e phosphorus atom and th
e eight-m
emb
er
edring by way of a "walk" r
earrang
em
ent mak
es g
ear slippag
e impossibl
e. Th
e g
earing motion is transf
err
edto th
e four-tooth
ed W(CO)
5 prop
ell
er conn
ect
ed to th
e rotating phosphorus atom,
enabling a g
earing ratioof 2:1 according to B3LYP and Car-Parrin
ello Mol
ecular Dynamics calculations. M
ethyl substitution of th
eeight-m
emb
er
ed ring t
emp
ers th
e g
earing proc
ess, with th
e PM
eW(CO)
5 entity passing th
e substitut
edcarbon atom only at t
emp
eratur
es abov
e 50
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es/
entiti
es/d
eg.gif">C