FA-12453 / Molecular graph representation / Member archive

Dative donor and acceptor swap during canonicalization · case 03

Dative donor and acceptor swap during canonicalization.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

Return [kind,a,b]; kind dative preserves donor a and acceptor b, kind covalent sorts numeric endpoint IDs.

Why this case matters

Controlled molecular graph interchange model; tests isolate atom or bond representation errors without claiming chemical validity or production toolkit equivalence.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
reverse dative	`["dative", 3, 5]`	`["dative", 5, 3]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.