more element-element bond stability; greater stability of multiple bonds (pi); octet rule generally obeyed; max. CoNo.=4; lower reactivity of compounds
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Why does the 2nd row have anomalies?
v. small; high X; no access to low lying d-orbitals (can't access higher o.s.)
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BF3 synthesis
B2O3 + 3CaF3 + 3H2SO4 -> 2BF3 + 2CaSO4 + 3H2O
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hydrolysis of BF3
4BF3 + 4H2O -> H3BO3 + 3HBF4 + 3H2O
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How does BF3 react?
Forms complexes with ethers
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Most common salt of Al?
Aluminium sulphate octadecahydrate
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How does this salt react?
Acidic; forms strong hydration complex with H2O which then hydrolyses. Stops at Al(OH)3 (White ppt). This forms "aluminate ion" with bases.
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Phosphonic acid and phosphoric acid?
H3PO3 and H3PO4
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Group 15 (AX5) structures
NF5 not known. PF5 and AsF5 = gas, trigonal bipyramidal. SbF5 = liquid, cyclic tetramer. BiF5 = linear chains with trans bridges
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Other cards in this set
Card 2
Front
v. small; high X; no access to low lying d-orbitals (can't access higher o.s.)
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