M2 Lecture 8 Flashcards
16. Det e- config (using rules and exceptions) for TM, including full config and noble gas abbreviated config and noble gas abbreviated config 17. Use e- config to classify 1st row TM as diamagnetic/paramagnetic, and det isoelectronic species 18. Identify common ox states of TM, rationalize the periodic tables observed, and det ox states in inorganic comps (25 cards)
Does Zeff increase or decrease across a row?
Zeff is the positive charge that an e- feels from the nucleus. As e- shielding increases, the outer valence e- feel less cahrge
Increase
Is the first row of the D-block smaller or larger than the toher rows?
Smaller
Why is the 2nd and 3rd row closer in size?
Lanthanide contraction: poor shielding by f electrons
Do TM atoms and ions need to have a completely filled d-orbital?
No, by definition, they must have incompletely filled d-orbitals
Is Zn2+ a TM?
No because Zn itself is not a transmition metal
Which e- config is correct?
a) 3d^10 4d^2 4p^6
b) 4d^2 3d^10 4p^6
b
What are the 2 exceptions to the Aufbau rule?
Cr: [Ar] 4s^1 3p^5
Cu: [Ar] 4s^1 3p^10
Why is Cr written as 4s^1 3p^5 instead of
4s^2 3p^4
Because pairing energy is greater as 3p^5 so it’s more stable
Ni e-config
[Ar] 4s^2 3d^8
Cu+
[Ar] 3d^10
Zn2+ e- config
[Ar] 3d^10
Because Zn2+ and Cr+ share the same e- configuration, what are they called? Do they have the same number of electrons?
Isoelectronic; no.
What defines the number of valence e-?
oxidation state
What determines the properties and chemistry of an element?
The number of val e- it has. Elements with the same number of val e- are more similar.
If an element has an empty d orbital, will it have color or be colorless?
colorless
paramagnetic
unpaired e-‘s
diamagnetic
no unpaired e-
What has a stronger response to the magnetic field, diamagnetic atoms or paramagnetic atoms?
paramagnetic
Are all TM paramagnetic
Yes, except Zn0
What acts as a Lewis Base in a TM complex, the ligand or the metal center?
The ligand
What acts as a Lewis Acid in a TM complex, the ligand or the metal center?
The metal center
Does a Lewis Base donate or accept e-?
donate
Does a Lewis Acid donate or accept e-?
accept
What isi the coordination number of [Ni(OH2)6]2+? What geometry will this complex have?
6; octahedral
