What is n? CO Ti Ti(n1-CsHg)2(5-C5H5)2 W(n3-CgHg)(m5-CgHg)(CO)2 The hapticity n of a molecule is the number of its atoms within bonding distance of the metal atom(from the Greek haptein, “to fasten). 0 The value of n gives us an idea of how many electrons are being donated from the molecule to the metal atom. XIV-11What is η? • The hapticity η of a molecule is the number of its atoms within bonding distance of the metal atom (from the Greek haptein, “to fasten”). • The value of η gives us an idea of how many electrons are being donated from the molecule to the metal atom. Ti(η1-C5H5)2(η5-C5H5)2 W(η3-C5H5)(η5-C5H5)(CO)2 Ti CO CO W XIV-11