In our ongoing attempts to offer new, innovative, unusual, often overlooked, and under-utilized ligand designs for our customers, we introduced 1,8-(diphenylphosphino)naphthalene, 99% (15-7123). This product is a bidentate ligand having characteristics similar to DPPP (15-0450), including two diphenylphosphine groups connected by a C3 unit. However, the naphthalene backbone provides a rigid structure similar to XantPhos (15-1242,) and SpanPhos (15-5165) ligands, resulting in a tighter bite angle. A surprising property of this ligand is its air sensitivity. Whereas most triarylphosphines are air stable, this molecule will oxidize rapidly on exposure to air.
Products mentioned in this our American colleagues blog:
15-0450: 1,3-Bis(diphenylphosphino)propane, 98% DPPP, CAS # 6737-42-4
15-1242: 9,9-Dimethyl-4,5-bis(diphenylphosphino)xanthene, min. 98% XANTPHOS, CAS # 161265-03-8
15-5165: racemic-8,8′-Bis(diphenylphosphino)-3,3′,4,4′-tetrahydro-4,4,4′,4′,6,6′-hexamethyl-2,2′-spirobi[2H-1-benzopyran], min. 95% SPANphos, CAS # 556797-94-5
15-7123: 1,8-(Diphenylphosphino)naphthalene, 99%, CAS # 153725-04-3