ligand substitution - 2024 ARCADIA

Question

Because of the 16-electron count of many square planar complexes, they typically undergo associative types of these reactions. For 10 points each:

[10e] Name these reactions by which a ligand in a complex is replaced by another incoming ligand. In organic molecules, these reactions occur via the SN2 and SN1 mechanisms.

ANSWER: ligand substitution

[10h] Most ligand substitutions occur via this mechanism, which is intermediate to associative and dissociative mechanisms. This mechanism is characterized by the formation of a short-lived, undetectable intermediate.

ANSWER: interchange mechanism [or concerted mechanism]

[10m] The Jahn-Teller distortion can accelerate ligand substitution for complexes with this geometry by weakening the metal-ligand bond. Fac-mer isomerism occurs in complexes with this geometry, which tend to have higher splitting energy.

ANSWER: octahedral [or square bipyramidal]

<JZ, Chemistry>

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Summary


2024 ARCADIA at BU	2024-12-06	Y	8	7.50	63%	13%	0%
2024 ARCADIA at Duke	2024-12-06	Y	3	16.67	100%	33%	33%
2024 ARCADIA at Missouri S&T	2024-12-06	Y	1	30.00	100%	100%	100%
2024 ARCADIA at Missouri S&T	2024-12-06	Y	2	10.00	50%	50%	0%
2024 ARCADIA Online	2025-05-17	Y	5	18.00	100%	80%	0%
2024 ARCADIA at Penn State	2024-12-06	Y	2	10.00	100%	0%	0%
2024 ARCADIA at Florida Tech	2024-12-06	Y	4	15.00	75%	75%	0%
2024 ARCADIA at UC Berkeley	2024-12-06	Y	2	15.00	100%	50%	0%
2024 ARCADIA at Waterloo	2024-11-09	Y	6	18.33	83%	67%	33%
2024 ARCADIA at GT	2024-12-06	Y	4	15.00	75%	50%	25%
2024 ARCADIA at Illinois	2024-11-09	Y	4	17.50	100%	75%	0%
2024 ARCADIA at Warwick	2024-12-06	Y	5	14.00	100%	40%	0%
2024 ARCADIA at Claremont	2024-11-02	Y	3	13.33	100%	33%	0%

Data


Berkeley A	Berkeley B	10	0	10	20
Stanford	Berkeley Past	10	0	0	10
Georgia Tech A	Innovation Academy B	10	0	10	20
Georgia Tech C	Johns Creek	0	10	0	10
Georgia Tech B	Georgia Tech D	10	0	10	20
Boston College B	Bowdoin A	0	0	0	0
Brandeis B	Bowdoin B	10	0	0	10
Brandeis A	Bowdoin C	0	0	0	0
Clark House	Boston College A	0	0	0	0
Tufts A	Clark Wilson	10	0	0	10
Harvard	MIT	10	0	10	20
Amherst	Tufts B	10	0	0	10
Yale	BU	10	0	0	10
ASU->Stanford->ASU pipeline	she limp on my waltz till i feel pathetique	10	0	10	20
In the Mood for Buzz	The cult of SGA	10	0	10	20
Madmen and Specialists	Social credit go vroom	10	0	0	10
Paddington in Peru (2024)	Old and Young	10	0	10	20
Toyota Tundra Turbos — Twisting Truths - Tackling Trivia - Taming Titans	bingy academy	10	0	10	20
Penn State	Maryland	10	0	0	10
Pitt	RIT	10	0	0	10
UCF A	Florida Tech	10	0	10	20
UF A	UCF B	10	0	10	20
UF B	USF	10	0	10	20
UF C	Valencia	0	0	0	0
ALCU	Jason et al.	10	0	0	10
Claremont	Anderson et al.	10	0	10	20
U[C]SD	SGV Ventures	10	0	0	10
South Carolina	North Carolina A	10	0	0	10
North Carolina B	Virginia Tech B	10	10	10	30
Virginia Tech C	Virginia Tech A	10	0	0	10
Missouri	Truman	10	10	10	30
Squidward Community College	Missouri	0	0	0	0
WashU	Truman	10	0	10	20
Toronto Metropolitan A	McGill A	0	0	0	0
McMaster ApocolocyntosisBidii	Ottawa Absolomabsolomabsolom	10	10	0	20
Toronto B	Carleton A	10	10	10	30
Waterloo Aspidistra	Toronto Chestnut Rice and Kamehameha	10	0	10	20
Waterloo Basic	Toronto Disband the Club 2k24	10	0	10	20
Toronto A	Waterloo Cloze	10	0	10	20
Lambert	Mississippi State	10	0	0	10
Chicago A	Illinois Orange	10	0	10	20
Illinois Blue	Chicago B	10	0	10	20
Notre Dame	Purdue A	10	0	0	10
SIUE	Purdue B	10	0	10	20
Cambridge B	Warwick A	10	0	10	20
LSE B	Imperial B	10	0	0	10
LSE A	Southampton	10	0	0	10
Warwick B	Cambridge A	10	0	10	20
Bristol	Warwick C	10	0	0	10