Group 1 Flashcards
What metallic structure do they take
Li-Cs bcc hence low density
What properties does Fr have
Radioactive and unstable
What properites do group 1 have
Strong reducing agent
What sort of reaction occurs with water
Violent
Why is lithium unusual
It is v small and high charge density hence v polarising - v covalent character
Strogest reducing agent but highest 1st IE made up for with hydration
How does M react with RX organometallic
LiR LiX in Et2O in dry conditions
What shape is LIME
Tetrameric
What shape is LiBu
Hexameric
How does BuLi react with TMEDA
Forms bridges
What is TMEDA
Lewis base
What is different between Li alykls and heavier
Less covalent
What evidence is used to discuss structure of metals in liquid ammonia
1) bright blue colour not varied on conc change therefore electrons not in metal
2) reversibility removal of NH3 leaves unchanged
3) conductivity paramagnetic
Electron sits in cavity within solvent and acts as a virtual atom
Na in EtN2
Crypt 222 dissolves
Electrolysis deposited at both ends
2 types of environments
