321148-68-9

Upstream product

• 4044-58-0 1-bromo-8-iodo-naphthalene 
• 1079-66-9 chloro-diphenylphosphine 
• 17135-74-9 1,8-dibromonaphthalene 

Downstream Products

• 372112-71-5 1-fluoro-1,2-dimethyl-2,2-diphenyl-1-[8-(diphenylphosphino)-1-naphthyl]disilane 
• 1434000-95-9 1-(diphenylphosphino)-8-naphthyldimesitylborane 
• 1542214-97-0 C₂₂H₁₆AuBr₂P 
• 1542214-99-2 C₂₂H₁₆AuBr₂P 

Relevant academic research and scientific papers

Peri-interactions in 8-Diphenylphosphino-1-bromonaphthalene, 6-Diphenylphosphino-5-bromoacenaphthene, and derivatives

The syntheses and full characterizations of the peri-substituted naphthalenes (Nap) and acenaphthenes (Ace) 1-Br-8-(Ph2P)-Nap (1a) and 5-Br-6-(Ph2P)-Ace (1b), as well as their derivatives 1-Br-8- [Ph2P(E)]-Nap [E = CH3 + (counterion I-) (2a); E = O (3a); E = S (4a); E = Se (5a)] and 5-Br-6-[Ph2P(E)]-Ace [E = CH 3 + (counterion I-) (2b); E = O (3b); E = S (4b); E = Se (5b)] are reported. In order to quantify the energetic and electronic effects of the peri-interactions, an additional set of molecules, 1c-5c, with the bromine atom and the Ph2P(E) fragment on opposite sides of the naphthalene group was generated, which serves as reference because 1c-5c exhibit negligible peri-interactions. The molecular arrangements of all 15 compounds were optimized at the B3PW91/6-311+G(2df,p) level of theory. The analysis of the peri-interactions was not only based on the inspection of the molecular arrangement and energies alone, but extended to a set of real-space bonding indicators (RSBI). These indicators were derived from theoretically calculated electron densities and pair densities, respectively. Particularly, the stockholder, Atoms-In-Molecules (AIM) and Electron-Localizability-Indicator (ELI-D) space partitioning schemes were used to produce Hirshfeld surfaces (HS), bond topological properties and basins of localized bonding and nonbonding electron pairs. Since 1c-5c are 35-58 kJ·mol-1 lower in energy than their counterparts 1a-5a, the hypothesis of a mainly repulsive peri-interaction in 1a/b-5a/b was confirmed. The shapes and contact patterns of the HSs of atoms and fragments involved in the peri-interactions (Br, P, E = CH3 +, O, S, Se) reveal that only in 1a and 1b are peri-interactions exhibited between the bromine and the phosphorus atoms. In all other cases (2a/b-5a/b), the interaction mainly occurs between the bromine atom and the E atom/fragment. According to the bond topological properties and the electron populations within the (non)bonding ELI-D basins, which both are almost unaffected by the Br-P/E periinteraction, sterical interactions are characterized essentially by geometrical and energetical changes.

Peri-interactions in naphthalenes, 21. Substituent effects in (8-dimethylamino-naphth-1-yl)-and [2-(dimethylamino-methyl)phenyl]-phosphines on the 31P-NMR signal positions

Contrary to claims in the literature, the 31P NMR signal positions of ortho-dimethylaminomethyl-substituted triarylphosphines do not provide evidence for hypercoordination at phosphorus; the observed highfield shifts relative to triphenylphosphine are rather due to the ortho-effect. In (8-dimethylamino-naphth-1-yl)phosphines, the signal positions similar to that of triphenylphosphine are the result of the highfield ortho-effect and a lowfield peri-substituent effect of about the same magnitude whose nature remains to be explored.