### Abstract

Laser (1064 nm) ablation of pressed mixtures of red phosphorus with powders of the metals cobalt or nickel generates positive ions [MP_{y}]^{+} (y = 2,4,6,8) and negative ions [M_{x}P_{y}]^{-}, monitored by Fourier transform ion cyclotron resonance (FTICR) mass spectrometry. At least 110 negative ions have been identified, more for Co than for Ni. The ions [M_{x}P_{y}]^{-} are distributed through the range 2 ≤ x ≤ 16, 4 ≤ y ≤ 17, with [Co_{x}P_{8}]^{-} (x = 2, 3, 4, 5), [Co_{x}P_{10}]^{-} (x = 5, 6, 7), [Ni_{x}P_{6}]^{-} (x = 4, 5, 7, 8), and [Ni_{x}P_{8}]^{-} (x = 2, 3, 4, 6, 7) as more abundant ions. The best negative ion spectra are obtained with 10:1 M/P mixtures, and high laser powers. The preponderance of even numbers of P atoms suggests that P_{2} units are bound to the metals, and this is supported by the collisional dissociation of [MP_{y}]^{+} ions (M = Co and Ni, y = 2, 4, 6) where loss of P_{2} is the major pathway. For both [CoP_{8}]^{+} and [NiP_{8}]^{+} initial loss of P_{4} is important. The reactions of [MP_{2}]^{+}, [MP_{4}]^{+} and [MP_{8}]^{+} with σ-ligands ammonia and methanol, and π-ligands C_{2}H_{2}, C_{2}H_{4} and C_{6}H_{6}, involve addition and substitution processes.

Original language | English |
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Pages (from-to) | 6288-6294 |

Number of pages | 7 |

Journal | Inorganic Chemistry |

Volume | 37 |

Issue number | 24 |

Publication status | Published - 1 Dec 1998 |

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## Cite this

_{y}]

^{+}and [M

_{x}P

_{y}]

^{-}Clusters Generated by Laser Ablation and Investigated by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry.

*Inorganic Chemistry*,

*37*(24), 6288-6294.