Hydrogen barrier agent, hydrogen barrier film forming composition, hydrogen barrier film, method for producing hydrogen barrier film, and electronic element

A hydrogen barrier agent comprising a compound represented by the following formula (1):

• wherein Xm+ represents an m-valent counter cation,
• the counter cation is an acyclic or cyclic nitrogen-containing aliphatic cation, a nitrogen-containing aromatic cation, or a metal cation,
• the acyclic or cyclic nitrogen-containing aliphatic cation comprises a cation represented by any one of the following formulas (2) to (4) and (14) to (16):
• wherein R11 to R14 each independently represents a hydrogen atom, an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally substituted alkenyl group, an optionally substituted alkynyl group, an optionally substituted aryl group, an optionally substituted aralkyl group, or an optionally substituted heterocyclic group,
• at least one selected from R11 to R14 is an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally substituted alkenyl group, an optionally substituted alkynyl group, an optionally substituted aryl group, an optionally substituted aralkyl group, or an optionally substituted heterocyclic group, and at least two selected from R11 to R14 may link together to form a ring,
• (R21)2N+═C(NR222)2 (3)
• wherein R21 each independently represents a hydrogen atom, an alkyl group, or a cycloalkyl group, R22 each independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, a —C(═NR23)—NR232, wherein three R23 each independently represents a hydrogen atom, an alkyl group, or a cycloalkyl group, or ═C(—NR242)2, wherein four R24 each independently represents a hydrogen atom or an organic group,
• wherein R31 each independently represents a hydrogen atom or an organic group, and s represents an integer of 2 or more and 6 or less,
• RH each independently represents a hydrogen atom or an alkyl group, R53 and R55 each independently represents an alkyl group or a cycloalkyl group, R54 represents an alkylene group, a cycloalkylene group, or a divalent group obtained by linking thereof, R56 represents an alkylene group, R53 to R56 each independently may be substituted with a halogen atom, a cyano group, or a nitro group, at least two R53 may be bonded to each other to form a ring, R53 and R54 may be bonded to each other to form a ring, and two R55 may be bonded to each other to form a ring,
• the nitrogen-containing aromatic cation comprises a cation represented by any one of the following formulas (5) and (7) to (13):
• wherein RH each independently represents a hydrogen atom or an alkyl group, R41, R45, R46, R47, R48, R50, R51, and R52 each independently represents a hydrogen atom, a halogen atom, a cyano group, a nitro group, an alkyl group, a cycloalkyl group, an alkenyl group, or an alkynyl group, R42 and R49 each independently represents a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, or an alkynyl group, R41 to R52 each independently may be substituted with a halogen atom, a cyano group, or a nitro group,
• R41 and R42 may be bonded to each other to form a ring, at least two R41 may be bonded to each other to form a ring, at least two R45 may be bonded to each other to form a ring, at least two R46 may be bonded to each other to form a ring, at least two R47 may be bonded to each other to form a ring, R48 and R49 may be bonded to each other to form a ring, at least two R48 may be bonded to each other to form a ring, at least two R50 may be bonded to each other to form a ring, at least two R51 may be bonded to each other to form a ring, and at least two R52 may be bonded to each other to form a ring,
• wherein the metal cation is a cation of a metal atom selected from the group consisting of alkali earth metal elements, hafnium, metal elements belonging to Group 14 excluding carbon and silicon, metal elements belonging to Group 15 excluding nitrogen, phosphorus, and arsenic, metal elements belonging to Group 16 excluding oxygen, sulfur, selenium, and tellurium, and semimetal elements, and a cation of an atomic group comprising any one of the above metal atoms,
• and R1 represents an optionally substituted aromatic group, R2 represents an optionally substituted alkylene group, R3 represents a halogen atom, a hydroxyl group, a mercapto group, a sulfide group, a silyl group, a silanol group, a nitro group, a nitroso group, a sulfonate group, a phosphino group, a phosphinyl group, a phosphonate group, or an organic group, m is an integer of 1 or more, n is an integer of 0 or more and 3 or less, and R2 may be bonded to R1 to form a cyclic structure.