diastereomers - Pacific Northwest

Question

Nomenclature of these compounds usually involves the terms “syn” and “anti” that are preserved by rotation around a single bond. For 10 points each:

[10m] Name these organic compounds that have multiple chiral centers, but unlike meso compounds, are not superimposable on their mirror images.

ANSWER: diastereomers [or diastereoisomers; prompt on stereoisomers; reject “enantiomers”]

[10e] The diastereomer nomenclature terms “threo” and “erythro” come from examples of these compounds called threose and erythrose. Dextrose is an alternate name for right-handed glucose, which is one of these biomolecules.

ANSWER: sugars [or saccharides]

[10h] Diastereoselective reactions are governed by this phenomenon, observed in chiral ketones by Donald Cram. Nguyễn Trọng Anh incorporated the Burgi–Dunitz angle to Hugh Felkin’s model of this phenomenon.

ANSWER: asymmetric induction

<MY, Chemistry>

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Summary


California	2025-02-01	Y	3	16.67	100%	67%	0%
Florida	2025-02-01	Y	3	3.33	33%	0%	0%
Great Lakes	2025-02-01	Y	6	10.00	50%	50%	0%
Lower Mid-Atlantic	2025-02-01	Y	6	8.33	83%	0%	0%
Midwest	2025-02-01	Y	6	11.67	83%	17%	17%
North	2025-02-01	Y	3	10.00	67%	33%	0%
Northeast	2025-02-01	Y	5	12.00	100%	20%	0%
Pacific Northwest	2025-02-01	Y	2	5.00	50%	0%	0%
South Central	2025-02-01	Y	2	15.00	100%	50%	0%
Southeast	2025-02-01	Y	4	7.50	75%	0%	0%
Upper Mid-Atlantic	2025-02-01	Y	9	10.00	67%	33%	0%
Upstate NY	2025-02-01	Y	3	3.33	33%	0%	0%

Data


Alberta	UBC	0	10	0	10
UW B	UW A	0	0	0	0