NH₂CI: C₂v, 2-fold rotation axis, mirror plane. CO2-3: D₃h, 3-fold rotation axes, mirror planes. SiF4: Td, 3-fold rotation axes, reflection planes. HCN: C∞v, infinite rotation axis, no symmetry plane. SIFCLBrl: C₁, no symmetry elements. BF4: Td, 3-fold rotation axes, reflection planes.
To determine the point groups and symmetry factors for each substance, we need to examine their molecular structures and apply the principles of molecular symmetry. Here are the point groups and symmetry factors for each substance:
NH₂CI (Ammonium Chloride):
Point Group: C₂v
Symmetry Factor: 2
CO2-3 (Carbonate ion):
Point Group: D₃h
Symmetry Factor: 6
SiF4 (Silicon Tetrafluoride):
Point Group: Td
Symmetry Factor: 12
HCN (Hydrogen Cyanide):
Point Group: C∞v
Symmetry Factor: 1
SIFCLBrl (Pentachlorofluorosulfur Bromine):
Point Group: C₁
Symmetry Factor: 1
BF4 (Tetrafluoroborate):
Point Group: Td
Symmetry Factor: 24
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