Chemistry of dimolybdenum complexes containing bridging anions of N,N′-di(3-methoxyphenyl)formamidine

Ying Yann Wu; Chun Wei Yeh; Zhi Kai Chan; Chia Her Lin; Chia Hsi Yang; Jhy Der Chen; Ju Chun Wang

doi:10.1016/j.molstruc.2008.01.037

Chemistry of dimolybdenum complexes containing bridging anions of N,N′-di(3-methoxyphenyl)formamidine

Ying Yann Wu
, Chun Wei Yeh
, Zhi Kai Chan
, Chia Her Lin
, Chia Hsi Yang
, Jhy Der Chen^*
, Ju Chun Wang

^*Corresponding author for this work

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

16 Citations (Scopus)

Abstract

Reaction of Mo(CO)₆ with excess N,N′-di(3-methoxyphenyl)formamidine (HDmAniF) in o-dichlorobenzene afforded the yellow complex Mo₂(DmAniF)₄, 1. The structure of 1 reveals that the ligands bridge the two metal centers through the two nitrogen atoms, forming two s-cis, s-trans and two s-trans, s-trans conformations. Reaction of 1 with Me₃OBF₄ in CH₃CN gave cis-[Mo₂(DmAniF)₂(CH₃CN)₄][BF₄]₂, 2, which crystallized in two different forms. The first form, 2·CH₂Cl₂·CH₃CN, 2a, showing one BF₄^- anion coordinating to the axial positions of the Mo-Mo bond [Mo⋯F = 2.685(4) Å], contains two cis DmAniF^- ligands which adopt the same s-cis, s-trans conformation. The other form, 2·0.5CH₂Cl₂ · 0.5CH₃CN, 2b, involves two independent molecules. While one [Mo-Mo = 2.1432(8) Å] of the two molecules shows axial interaction by CH₃CN [Mo⋯N = 2.692(8) Å] and the two cis DmAniF^- ligands adopt the same s-cis, s-trans conformation, the other one [Mo-Mo = 2.1317(9) Å] shows no axial interaction and the two cis DmAniF^- ligands adopt different conformations, which are s-cis, s-trans and s-cis, s-cis, respectively. The Mo-Mo distance of 2a, 2.1281(6) Å, is the shortest among the compounds having Mo₂(μ₂-L)₂(CH₃CN)₄ core, where L is the anionic, cationic or neutral form of a formamidine ligand. Reaction of 2 with NaOCH₃ in CH₃OH produced the tetranuclear complex cis-[Mo₂(DmAniF)₂]₂(μ-OCH₃)₄, 3. The molecule of 3 bears four bridging CH₃O^- groups that link two quadruply bonded moieties and the ligands adopts the s-trans, s-trans conformation.

Original language	English
Pages (from-to)	48-56
Number of pages	9
Journal	Journal of Molecular Structure
Volume	890
Issue number	1-3
DOIs	https://doi.org/10.1016/j.molstruc.2008.01.037
Publication status	Published - 2008 Nov 12
Externally published	Yes

Keywords

Conformation
Dimolybdenum complex
Formamidine
N,N′-di(3-methoxyphenyl)formamidine

ASJC Scopus subject areas

Analytical Chemistry
Spectroscopy
Organic Chemistry
Inorganic Chemistry

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10.1016/j.molstruc.2008.01.037

Cite this

@article{eb5a2654490b46bf92aad73fdc650e16,

title = "Chemistry of dimolybdenum complexes containing bridging anions of N,N′-di(3-methoxyphenyl)formamidine",

abstract = "Reaction of Mo(CO)6 with excess N,N′-di(3-methoxyphenyl)formamidine (HDmAniF) in o-dichlorobenzene afforded the yellow complex Mo2(DmAniF)4, 1. The structure of 1 reveals that the ligands bridge the two metal centers through the two nitrogen atoms, forming two s-cis, s-trans and two s-trans, s-trans conformations. Reaction of 1 with Me3OBF4 in CH3CN gave cis-[Mo2(DmAniF)2(CH3CN)4][BF4]2, 2, which crystallized in two different forms. The first form, 2·CH2Cl2·CH3CN, 2a, showing one BF4- anion coordinating to the axial positions of the Mo-Mo bond [Mo⋯F = 2.685(4) {\AA}], contains two cis DmAniF- ligands which adopt the same s-cis, s-trans conformation. The other form, 2·0.5CH2Cl2 · 0.5CH3CN, 2b, involves two independent molecules. While one [Mo-Mo = 2.1432(8) {\AA}] of the two molecules shows axial interaction by CH3CN [Mo⋯N = 2.692(8) {\AA}] and the two cis DmAniF- ligands adopt the same s-cis, s-trans conformation, the other one [Mo-Mo = 2.1317(9) {\AA}] shows no axial interaction and the two cis DmAniF- ligands adopt different conformations, which are s-cis, s-trans and s-cis, s-cis, respectively. The Mo-Mo distance of 2a, 2.1281(6) {\AA}, is the shortest among the compounds having Mo2(μ2-L)2(CH3CN)4 core, where L is the anionic, cationic or neutral form of a formamidine ligand. Reaction of 2 with NaOCH3 in CH3OH produced the tetranuclear complex cis-[Mo2(DmAniF)2]2(μ-OCH3)4, 3. The molecule of 3 bears four bridging CH3O- groups that link two quadruply bonded moieties and the ligands adopts the s-trans, s-trans conformation.",

keywords = "Conformation, Dimolybdenum complex, Formamidine, N,N′-di(3-methoxyphenyl)formamidine",

author = "Wu, \{Ying Yann\} and Yeh, \{Chun Wei\} and Chan, \{Zhi Kai\} and Lin, \{Chia Her\} and Yang, \{Chia Hsi\} and Chen, \{Jhy Der\} and Wang, \{Ju Chun\}",

note = "Funding Information: We wish to thank the National Science Council of the Republic of China for support.",

year = "2008",

month = nov,

day = "12",

doi = "10.1016/j.molstruc.2008.01.037",

language = "English",

volume = "890",

pages = "48--56",

journal = "Journal of Molecular Structure",

issn = "0022-2860",

publisher = "Elsevier BV",

number = "1-3",

}

TY - JOUR

T1 - Chemistry of dimolybdenum complexes containing bridging anions of N,N′-di(3-methoxyphenyl)formamidine

AU - Wu, Ying Yann

AU - Yeh, Chun Wei

AU - Chan, Zhi Kai

AU - Lin, Chia Her

AU - Yang, Chia Hsi

AU - Chen, Jhy Der

AU - Wang, Ju Chun

N1 - Funding Information: We wish to thank the National Science Council of the Republic of China for support.

PY - 2008/11/12

Y1 - 2008/11/12

N2 - Reaction of Mo(CO)6 with excess N,N′-di(3-methoxyphenyl)formamidine (HDmAniF) in o-dichlorobenzene afforded the yellow complex Mo2(DmAniF)4, 1. The structure of 1 reveals that the ligands bridge the two metal centers through the two nitrogen atoms, forming two s-cis, s-trans and two s-trans, s-trans conformations. Reaction of 1 with Me3OBF4 in CH3CN gave cis-[Mo2(DmAniF)2(CH3CN)4][BF4]2, 2, which crystallized in two different forms. The first form, 2·CH2Cl2·CH3CN, 2a, showing one BF4- anion coordinating to the axial positions of the Mo-Mo bond [Mo⋯F = 2.685(4) Å], contains two cis DmAniF- ligands which adopt the same s-cis, s-trans conformation. The other form, 2·0.5CH2Cl2 · 0.5CH3CN, 2b, involves two independent molecules. While one [Mo-Mo = 2.1432(8) Å] of the two molecules shows axial interaction by CH3CN [Mo⋯N = 2.692(8) Å] and the two cis DmAniF- ligands adopt the same s-cis, s-trans conformation, the other one [Mo-Mo = 2.1317(9) Å] shows no axial interaction and the two cis DmAniF- ligands adopt different conformations, which are s-cis, s-trans and s-cis, s-cis, respectively. The Mo-Mo distance of 2a, 2.1281(6) Å, is the shortest among the compounds having Mo2(μ2-L)2(CH3CN)4 core, where L is the anionic, cationic or neutral form of a formamidine ligand. Reaction of 2 with NaOCH3 in CH3OH produced the tetranuclear complex cis-[Mo2(DmAniF)2]2(μ-OCH3)4, 3. The molecule of 3 bears four bridging CH3O- groups that link two quadruply bonded moieties and the ligands adopts the s-trans, s-trans conformation.

AB - Reaction of Mo(CO)6 with excess N,N′-di(3-methoxyphenyl)formamidine (HDmAniF) in o-dichlorobenzene afforded the yellow complex Mo2(DmAniF)4, 1. The structure of 1 reveals that the ligands bridge the two metal centers through the two nitrogen atoms, forming two s-cis, s-trans and two s-trans, s-trans conformations. Reaction of 1 with Me3OBF4 in CH3CN gave cis-[Mo2(DmAniF)2(CH3CN)4][BF4]2, 2, which crystallized in two different forms. The first form, 2·CH2Cl2·CH3CN, 2a, showing one BF4- anion coordinating to the axial positions of the Mo-Mo bond [Mo⋯F = 2.685(4) Å], contains two cis DmAniF- ligands which adopt the same s-cis, s-trans conformation. The other form, 2·0.5CH2Cl2 · 0.5CH3CN, 2b, involves two independent molecules. While one [Mo-Mo = 2.1432(8) Å] of the two molecules shows axial interaction by CH3CN [Mo⋯N = 2.692(8) Å] and the two cis DmAniF- ligands adopt the same s-cis, s-trans conformation, the other one [Mo-Mo = 2.1317(9) Å] shows no axial interaction and the two cis DmAniF- ligands adopt different conformations, which are s-cis, s-trans and s-cis, s-cis, respectively. The Mo-Mo distance of 2a, 2.1281(6) Å, is the shortest among the compounds having Mo2(μ2-L)2(CH3CN)4 core, where L is the anionic, cationic or neutral form of a formamidine ligand. Reaction of 2 with NaOCH3 in CH3OH produced the tetranuclear complex cis-[Mo2(DmAniF)2]2(μ-OCH3)4, 3. The molecule of 3 bears four bridging CH3O- groups that link two quadruply bonded moieties and the ligands adopts the s-trans, s-trans conformation.

KW - Conformation

KW - Dimolybdenum complex

KW - Formamidine

KW - N,N′-di(3-methoxyphenyl)formamidine

UR - https://www.scopus.com/pages/publications/53849146724

UR - https://www.scopus.com/pages/publications/53849146724#tab=citedBy

U2 - 10.1016/j.molstruc.2008.01.037

DO - 10.1016/j.molstruc.2008.01.037

M3 - Article

AN - SCOPUS:53849146724

SN - 0022-2860

VL - 890

SP - 48

EP - 56

JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

IS - 1-3

ER -

Chemistry of dimolybdenum complexes containing bridging anions of N,N′-di(3-methoxyphenyl)formamidine

Abstract

Keywords

ASJC Scopus subject areas

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