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
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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 -