glycosidic bonds - 2024 ACF Winter

Question

The Koenigs–Knorr reaction forms one of these bonds with the aid of silver carbonate. For 10 points each:

[10m] Name these bonds in which an ether joins a carbohydrate molecule to another group. Cellulose consists of glucose monomers attached via beta-1,4 examples of these bonds.

ANSWER: glycosidic bonds [or glycosidic linkages]

[10h] Glycosidic bonds connect a hydroxyl carbon with one of these two moieties common in sugars. The addition of a [emphasize] single alcohol to an aldehyde or a ketone creates these two groups, whose names are prefixed to reflect this. Name either.

ANSWER: hemiacetal OR hemiketal [reject “acetal” or “ketal”]

[10e] This six-carbon sugar appears naturally as a cyclic hemiketal. This sugar, which is joined to glucose via an alpha-1,2-glycosidic bond to form sucrose, is found in high percentages in a sweetener used as a corn syrup.

ANSWER: fructose [accept high-fructose corn syrup]

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Summary


2024 ACF Winter at UC Berkeley	2024-11-16	Y	3	20.00	100%	67%	33%
2024 ACF Winter at Clemson	2024-11-16	Y	7	11.43	86%	29%	0%
2024 ACF Winter at Clemson	2024-11-16	Y	6	16.67	100%	67%	0%
2024 ACF Winter at Lehigh	2024-11-16	Y	7	11.43	86%	29%	0%
2024 ACF Winter at Northwestern	2024-11-16	Y	9	14.44	89%	44%	11%
2024 ACF Winter at Online	2024-11-16	Y	8	12.50	100%	25%	0%
2024 ACF Winter at Online	2024-11-16	Y	3	6.67	33%	0%	33%
2024 ACF Winter at Central Florida	2024-11-16	Y	5	16.00	100%	60%	0%
2024 ACF Winter at Oxford	2024-11-16	Y	10	17.00	100%	70%	0%
2024 ACF Winter at Brandeis	2024-11-16	Y	7	15.71	86%	57%	14%

Data


Bard A	Johns Hopkins B	0	0	10	10
Columbia B	Princeton A	0	0	10	10
Johns Hopkins A	Haverford A	10	0	10	20
Penn B	Rowan A	10	0	0	10
Lehigh	Penn State A	0	0	10	10
Arkansas	Vassar B	0	0	10	10
WUSTL A	Central Oklahoma	0	0	10	10
WUSTL A	Central Oklahoma	0	0	10	10
WUSTL A	Central Oklahoma	0	0	10	10
WUSTL A	Central Oklahoma	0	0	10	10
Vassar A	Central Oklahoma	0	0	10	10
Vassar A	Iowa	10	0	10	20
Vassar A	Central Oklahoma	0	0	0	0
Vassar A	Iowa	10	0	0	10
WUSTL A	Central Oklahoma	0	0	10	10
WUSTL A	Central Oklahoma	0	0	10	10
WUSTL A	Central Oklahoma	0	0	10	10
WUSTL A	Central Oklahoma	0	0	10	10
McGill E	Mississippi State	0	10	0	10
Vassar A	Central Oklahoma	0	0	10	10
Vassar A	Iowa	10	0	10	20
Vassar A	Central Oklahoma	0	0	0	0
Vassar A	Iowa	10	0	0	10
Texas A	McGill E	10	0	10	20
NYU B	Mississippi State	0	0	10	10
NYU A	Texas D	0	0	10	10
Texas C	Ole Miss	0	0	10	10
Colorado College	Texas B	0	0	10	10
Boston University A	A Brandeis Supreme	0	0	10	10
Diamond Brandeis	Amherst A	0	0	10	10
Carabrandeis	MIT A	0	0	10	10
Harvard A	Yale C	10	10	10	30
Yale A	Tufts A	10	0	0	10
Northeastern A	Tufts B	10	0	10	20
Yale B	Williams A	10	0	10	20
Berkeley B	Berkeley A	10	10	10	30
Stanford A	Stanford L	0	0	10	10
Stanford M	Berkeley C	10	0	10	20
Emory B	Alabama A	10	0	10	20
Emory B	Georgia A	10	0	10	20
Emory B	Alabama A	10	0	0	10
Emory B	Georgia A	10	0	0	10
Georgia Tech F	Clemson A	0	0	10	10
Georgia Tech F	Georgia Tech C	0	0	10	10
Georgia Tech F	Clemson A	0	0	10	10
Georgia Tech F	Georgia Tech C	0	0	10	10
Auburn A	Emory A	0	0	10	10
Auburn A	Georgia Tech B	10	0	10	20
Auburn A	Emory A	0	0	10	10
Auburn A	Georgia Tech B	10	0	10	20
Georgia Tech B	Georgia Tech A	10	0	10	20
Georgia A	Georgia Tech C	0	0	10	10
Georgia Tech D	Georgia Tech E	0	0	10	10
Tusculum A	Auburn C	0	0	10	10
Alabama A	Clemson A	10	0	10	20
Auburn A	Emory A	0	0	10	10
Auburn A	Georgia Tech B	10	0	10	20
Auburn A	Emory A	0	0	10	10
Auburn A	Georgia Tech B	10	0	10	20
Emory B	Alabama A	10	0	10	20
Emory B	Georgia A	10	0	10	20
Emory B	Alabama A	10	0	0	10
Emory B	Georgia A	10	0	0	10
Georgia Tech F	Clemson A	0	0	10	10
Georgia Tech F	Georgia Tech C	0	0	10	10
Georgia Tech F	Clemson A	0	0	10	10
Georgia Tech F	Georgia Tech C	0	0	10	10
Emory A	Georgia Tech D	10	0	10	20
Georgia Tech E	Georgia Tech A	0	0	10	10
Penn State B	Rutgers A	0	0	10	10
Penn A	Rutgers C	0	0	10	10
WashU B	Miami	10	0	10	20
Indiana B	Purdue D	0	0	10	10
UIUC B	SIUE A	0	0	10	10
UChicago C	UChicago A	0	0	10	10
Purdue A	UChicago D	10	10	10	30
UIUC A	WashU D	10	0	10	20
UIUC C	Purdue B	0	0	10	10
Notre Dame	UIUC D	0	0	10	10
WashU C	Purdue C	10	0	0	10
UCF A	Florida Tech B	10	0	10	20
UCF B	Florida Tech A	0	0	10	10
Florida State University A	UF D	10	0	10	20
UF B	UF E	10	0	10	20
UF F	UF A	0	0	10	10
Bristol A	Imperial A	10	0	10	20
Bristol B	Warwick B	10	0	10	20
Cambridge B	Cambridge A	10	0	10	20
Cambridge C	Oxford A	10	0	10	20
Birmingham	Cambridge D	10	0	10	20
LSE B	Edinburgh	0	0	10	10
Imperial B	Southampton B	0	0	10	10
LSE A	Manchester	10	0	10	20
Oxford B	Warwick A	10	0	10	20
Durham B	Vanderbilt	0	0	10	10