944393-86-6

Basic information

• Product Name: 5,5′-bis(dimesitylboranyl)-2,2′-bipyridine
• Synonyms: 5,5′-bis(dimesitylboranyl)-2,2′-bipyridine
• CAS NO: 944393-86-6
• Molecular Weight: 652.538
• Mol File: 944393-86-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 5,5′-bis(dimesitylboranyl)-2,2′-bipyridine(CAS DataBase Reference)
• NIST Chemistry Reference: 5,5′-bis(dimesitylboranyl)-2,2′-bipyridine(944393-86-6)
• EPA Substance Registry System: 5,5′-bis(dimesitylboranyl)-2,2′-bipyridine(944393-86-6)

Safety Data

• Hazardous Substances Data: 944393-86-6(Hazardous Substances Data)

Upstream product

• 436-59-9 dimesitylfluoroborane 
• 15862-18-7 5,5'-dibromo-2,2'-dipyridyl 

Downstream Products

• 944393-88-8 [Cu(5,5'-bis(BMes₂)-2,2'-bipy)(PPh₃)2][BF₄] 
• 944393-89-9 Pt(5,5'-bis(B(mesityl)2)-2,2'-bipyridine)Ph₂ 
• 1137719-52-8 Pt(5,5'-bis(B(mesityl)2)-2,2'-bipyridine)Cl₂ 

Relevant articles and documents

Enhancing electron accepting ability of triarylboron via π-conjugation with 2,2′-bipy and metal chelation: 5,5′-bis(BMes 2)-2,2′-bipy and its metal complexes

The synthesis of a new diboron compound, 5,5′-bis(BMes2)-2,2′-bipy (B2bipy, 1), has been accomplished. The conjugation of the 2,2′-bipy unit with the two BMes2 groups in 1 has been found to greatly enhance the electron-accepting ability of the boron centers, compared to the biphenyl analogue. 1 is an effective chelate ligand for metal ions and three metal complexes; namely, [CuI(B2bipy)(PPh3)2][BF4], 2, PtII(B2bipy)Ph2, 3a, and PtII(B2bipy)Me2, 3b, have been synthesized. The binding of metal ions to B2bipy was found to further significantly increase the electron-accepting ability/Lewis acidity of the boron centers. Cyclic voltammetry diagrams revealed that the free ligand and all three complexes display two reversible reduction peaks that are separated by 0.31-0.40 V. The first reduction potential (E1/2) for 1, 2, 3a, and 3b was found to be -1.69, -1.36, -1.34, and -1.38 V, respectively, versus FeCp2+/0 in DMF, which supports that the electron-accepting ability of the metal complexes is much greater than that of BMes(C6F5)2. The strong electron-accepting ability/Lewis acidity of the metal complexes and the free ligand was manifested by their ability to sequentially bind to 2 equiv of F- ions in non-alcoholic solvents with K1 ≥ 108 and 109 M-1 for 1 and 3a, respectively, and to 1 equiv of F- ions in the presence of methanol/ethanol or water. The crystal structures of 1, its 2:1 fluoride adduct [NBu4]2[1F2], and 3a were established by X-ray diffraction analyses. The 1:1 fluoride adduct of 2, [CuI(B2bipyF)(PPh3)2], 2F, isolated directly from the reaction of 2 with NBu4F in a 4:1 mixture of CH3OH and CH2Cl2 was characterized. All metal complexes are intensely colored and display a characteristic metal-to-ligand (B2bipy) charge transfer absorption band in the visible region, which was found to be highly sensitive toward binding by anions such as fluorides. Copyright