Novel Hg(II) metal complexes of chelating phosphinopyridylamine and its selenide ligands: Synthesis, characterization, and X-ray structures

Harbi Tomah Al-Masri; Ziad Moussa; Akram Ali Almejled

doi:10.1016/j.tet.2025.134810

Novel Hg(II) metal complexes of chelating phosphinopyridylamine and its selenide ligands: Synthesis, characterization, and X-ray structures

Harbi Tomah Al-Masri
, Ziad Moussa
, Akram Ali Almejled

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

The reaction of 4-Me–C₅H₃N–2-NH(PPh₂) (1) and monooxidized selenoyl (4-CH₃)C₆H₃N-2-NH(P(Se)Ph₂) (2) ligands with HgX₂ (X = Cl, I) in acetone yielded the dimeric complexes [HgCl₂]₂[{1-κ²P,N}{1-κP}] (3) and [HgI₂{1-κ²P,N}]₂ (4), as well as [HgX₂{2-κ²Se,N^py}] (5, X = Cl; 6, X = I) derivatives. Complexes 3–6 were isolated and characterized utilizing multinuclear NMR (¹H, ¹³C, and ³¹P) and infrared spectroscopy. The molecular structures of compounds 1 and 3–6 were elucidated using single-crystal X-ray diffraction analysis. Complexes 3–6 constitute the first structurally defined complexes of these ligands with mercury metal identified to date. Dimer 3 is distinguished by the presence of Hg(II) metals exhibiting coordination numbers of five and four inside a single complex.

Original language	English
Article number	134810
Journal	Tetrahedron
Volume	185
DOIs	https://doi.org/10.1016/j.tet.2025.134810
Publication status	Published - Oct 15 2025

Keywords

Hg-dimer
Mercury
P,N-donor
Phosphinopyridylamine
Se,N-donor
Selenium

ASJC Scopus subject areas

Biochemistry
Drug Discovery
Organic Chemistry

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title = "Novel Hg(II) metal complexes of chelating phosphinopyridylamine and its selenide ligands: Synthesis, characterization, and X-ray structures",

abstract = "The reaction of 4-Me–C5H3N–2-NH(PPh2) (1) and monooxidized selenoyl (4-CH3)C6H3N-2-NH(P(Se)Ph2) (2) ligands with HgX2 (X = Cl, I) in acetone yielded the dimeric complexes [HgCl2]2[\{1-κ2P,N\}\{1-κP\}] (3) and [HgI2\{1-κ2P,N\}]2 (4), as well as [HgX2\{2-κ2Se,Npy\}] (5, X = Cl; 6, X = I) derivatives. Complexes 3–6 were isolated and characterized utilizing multinuclear NMR (1H, 13C, and 31P) and infrared spectroscopy. The molecular structures of compounds 1 and 3–6 were elucidated using single-crystal X-ray diffraction analysis. Complexes 3–6 constitute the first structurally defined complexes of these ligands with mercury metal identified to date. Dimer 3 is distinguished by the presence of Hg(II) metals exhibiting coordination numbers of five and four inside a single complex.",

keywords = "Hg-dimer, Mercury, P,N-donor, Phosphinopyridylamine, Se,N-donor, Selenium",

author = "Al-Masri, \{Harbi Tomah\} and Ziad Moussa and Almejled, \{Akram Ali\}",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier Ltd",

year = "2025",

month = oct,

day = "15",

doi = "10.1016/j.tet.2025.134810",

language = "English",

volume = "185",

journal = "Tetrahedron",

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TY - JOUR

T1 - Novel Hg(II) metal complexes of chelating phosphinopyridylamine and its selenide ligands

T2 - Synthesis, characterization, and X-ray structures

AU - Al-Masri, Harbi Tomah

AU - Moussa, Ziad

AU - Almejled, Akram Ali

PY - 2025/10/15

Y1 - 2025/10/15

N2 - The reaction of 4-Me–C5H3N–2-NH(PPh2) (1) and monooxidized selenoyl (4-CH3)C6H3N-2-NH(P(Se)Ph2) (2) ligands with HgX2 (X = Cl, I) in acetone yielded the dimeric complexes [HgCl2]2[{1-κ2P,N}{1-κP}] (3) and [HgI2{1-κ2P,N}]2 (4), as well as [HgX2{2-κ2Se,Npy}] (5, X = Cl; 6, X = I) derivatives. Complexes 3–6 were isolated and characterized utilizing multinuclear NMR (1H, 13C, and 31P) and infrared spectroscopy. The molecular structures of compounds 1 and 3–6 were elucidated using single-crystal X-ray diffraction analysis. Complexes 3–6 constitute the first structurally defined complexes of these ligands with mercury metal identified to date. Dimer 3 is distinguished by the presence of Hg(II) metals exhibiting coordination numbers of five and four inside a single complex.

AB - The reaction of 4-Me–C5H3N–2-NH(PPh2) (1) and monooxidized selenoyl (4-CH3)C6H3N-2-NH(P(Se)Ph2) (2) ligands with HgX2 (X = Cl, I) in acetone yielded the dimeric complexes [HgCl2]2[{1-κ2P,N}{1-κP}] (3) and [HgI2{1-κ2P,N}]2 (4), as well as [HgX2{2-κ2Se,Npy}] (5, X = Cl; 6, X = I) derivatives. Complexes 3–6 were isolated and characterized utilizing multinuclear NMR (1H, 13C, and 31P) and infrared spectroscopy. The molecular structures of compounds 1 and 3–6 were elucidated using single-crystal X-ray diffraction analysis. Complexes 3–6 constitute the first structurally defined complexes of these ligands with mercury metal identified to date. Dimer 3 is distinguished by the presence of Hg(II) metals exhibiting coordination numbers of five and four inside a single complex.

KW - Hg-dimer

KW - Mercury

KW - P,N-donor

KW - Phosphinopyridylamine

KW - Se,N-donor

KW - Selenium

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UR - https://www.scopus.com/pages/publications/105010182450#tab=citedBy

U2 - 10.1016/j.tet.2025.134810

DO - 10.1016/j.tet.2025.134810

M3 - Article

AN - SCOPUS:105010182450

SN - 0040-4020

VL - 185

JO - Tetrahedron

JF - Tetrahedron

M1 - 134810

ER -

Novel Hg(II) metal complexes of chelating phosphinopyridylamine and its selenide ligands: Synthesis, characterization, and X-ray structures

Abstract

Keywords

ASJC Scopus subject areas

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