La Monica, Girolamo published the artcileReactions of carbon dioxide with tetrahydroborato copper(I) complexes in moist solvents: synthesis and reactions of [(phen)2Cu][(HO)3B(O2CH)] and (phen)(Ph3P)Cu(O2COH) (phen = 1,10-phenanthroline), Application In Synthesis of 25753-84-8, the publication is Inorganica Chimica Acta (1988), 143(2), 239-45, database is CAplus.
CO2 reacts with Cu(phen)(PPh3)(BH4) (I; phen = 1,10-phenanthroline) in moist THF and in the presence of free phen affording [Cu(phen)2][(HO)3B(O2CH)] (II). II can be obtained from I and aqueous HCO2H in the presence of phen and from Cu(phen)2(BH4) and aqueous HCO2H or CO2 in moist THF. The reaction of I with CO2 in moist MeOH gives Cu(phen)(PPh3)(O2COH) (III). The action of ROH on II gave [Cu(phen)2](O2CH), the B atom being eliminated as B(OR)3. II reacts with an alc. Ph3P solution giving Cu(phen)(PPh3)(O2CH). The reaction of II with PhCH2Br gives HCO2CH2Ph. The reactivity of III toward neutral ligands such as phen and cyclohexylisocyanide (CyNC) was studied, [Cu(phen)2](HCO3) and [Cu(phen)(CNCy)2](HCO3), being obtained, resp.
Inorganica Chimica Acta published new progress about 25753-84-8. 25753-84-8 belongs to bromides-buliding-blocks, auxiliary class Copper, name is Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), and the molecular formula is C30H24BrCuN2P, Application In Synthesis of 25753-84-8.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary