460298
Description
Flashcards by emma_moran, updated more than 1 year ago
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Created by emma_moran
almost 11 years ago
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| Question | Answer |
| What is a dative bond? | Sharing of two electrons when both electrons are provided by one of the linked atoms? |
| What is the atoms that supplies the pair of electrons called? | Donor |
| What is the atom that doesn't donate any electrons called? | Acceptor |
| Can you distinguish a co-ordinate bond from a normal covalent bond? | NO |
| Where are co-ordinate bonds usually found? | Transition metal complex ions, the ammonium ion, the hydroxonium ion, carbon monoxide and nitric acid |
| What are the requirements for a dative bond? | The atom acting as the donor must have a lone pair of electrons. The acceptor should have a vacant orbital to accept the electron pair. |
| What is an ammonium ion? | NH4+ |
| Do co-ordinate compounds have higher or lower boiling points than purely covalent compounds? | HIGHER (lower than ionic) |
| Are co-ordinate compounds soluble? | Soluble in non-polar solvents but less soluble in non-polar solvents (can react with water) |
| Can co-ordinate compounds conduct electricity? | NO |
| What biological molecules depend on co-ordinate bonding? | Haemoglobin, Myoglobin, Vitamin B12, Chlorophyll |
| How do some drugs depend on of co-ordinate bonding? | Some act as donors in dative covalent bonds and some act as acceptors for biological donors |
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Image:
linear (image/jpg)
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Shape:Linear Bond Angle: 180 |
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Image:
trigonal_planar (image/jpg)
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Shape: trigonal planar Bond angle: 120 |
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Image:
tetrahedral (image/jpg)
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Shape: tetrahedral Bond angle: 109.5 |
| Shape: trigonal bipyramidal Bond angles: 90, 120 | |
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Image:
octahedral (image/jpg)
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Shape: octahedral Bond angle:90 |
| If a molecule has lone pairs present what can happen to the shape of the molecule? | The molecules shape becomes distorted due to repulsion between lone pairs and other pairs of electrons |
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Image:
pyrimidal (image/jpg)
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Shape: pyramidal Bond angle: 109.5-2.5=107 |
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Image:
angular (image/jpg)
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Shape: bent planar Bond angle: 109.5-4=104.5 |
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Image:
square_planar (image/png)
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Shape: square planar |
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