Synthesis and Characterization of a Copper(I) Complex

This was synthesized following a modified literature procedure.^{28 (link)} Ph₂P(2-quinoline) (99.7 mg, 0.32 mmol) and [Cu(MeCN)₄]PF₆ (76.3 mg, 0.21 mmol) were placed under nitrogen and dissolved in anhydrous MeCN (2 ml). The resulting solution was stirred at r.t. (18 h) before removing insoluble solids using a syringe filter (0.2 μm) to give a clear yellow solution. Et₂O (20 ml) was added to the solution to precipitate the product as a yellow powder with a lime green fluorescence (68 mg, 0.05 mmol, 24% yield).
δ_H (500 MHz, CD₃CN, ppm) 7.91 (br s), 7.80 (t, J = 8.8 Hz), 7.72 (t, J = 7.64 Hz), 7.61 (t, J = 8.0 Hz), 7.54 (t, J = 7.9 Hz), 7.50 (t, J = 7.7 (Hz)), 7.40 (t, J = 7.3 Hz).
δ_P{H} (203 MHz, CD₃CN, ppm): 0.26 (br s), −144.63 (sept, PF₆⁻).
δ_C (126 MHz, CD₃CN, ppm): 135.18, 135.06, 131.44, 131.20, 129.81, 129.74, 129.01, 128.58, 128.06, 124.95, 124.77.
HRMS(ESI+): [C₂H₃CuN]⁺m/z = 103.9554, calcd = 103.9562. [C₆₃H₄₈CuN₃P₃]⁺m/z = 1002.2385, calcd = 1002.2357. [C₄₂H₃₂CuN₂P₂]⁺m/z = 689.1359, calcd = 689.1337. [C₂₃H₁₉CuN₂P]⁺m/z = 417.0586, calcd = 417.0582. [C₂₁H₁₆CuNP]⁺m/z = 376.0317, calcd = 376.0316.