# Can you combine elemental gold and boron?

Is it possible to combine gold and boron to form compounds? A simple example being:

$$\ce{Au + B -> AuB}$$

• – MaxW Feb 19 '17 at 22:53
• @MaxW Thank ! is my equation correct or am i missing something ? Also is the reaction made with gaseous gold and bore ? – creekorful Feb 19 '17 at 23:00
• That is the overall reaction but making AuB isn't as easy as the equation would make it seem. Gold is a solid at room temperature of course. – MaxW Feb 19 '17 at 23:04
• @MaxW yeah of course, but heating the reactants at 2075° (so the bore and gold should be liquid) (bore fusion point is 2075 and gold is 1064) and then freezing down the solution would work ? – creekorful Feb 19 '17 at 23:08
• I don't know how to do it. No point in me speculating and telling you wrong. But at a temperature of 2000 degrees how do you protect the material from atmospheric oxygen? What container material do you use? And so on... – MaxW Feb 19 '17 at 23:19

Yes, gold and boron can bond with each other to form alloy clusters. They are very important in semiconductor industry and used in fabrication process. Here(1) is a short note on gold-boron alloy:

Photoelectron spectroscopy and density-functional theory are combined to investigate the electronic and structural properties of a series of $\ce{B-Au}$ alloy clusters: $\ce{B6Au_{n}^{−}}$ and $\ce{B6Au_{n}}$ ($\ce{n = 1−3}$). Rich spectral features are observed for each species, and vibrational structures are resolved for numerous detachment transitions of $\ce{B6Au^−}$ and $\ce{B6Au^{2−}}$. Electron affinities of $\ce{B6Au_{n} (n = 1−3)}$ are evaluated to be 2.70 ± 0.03, 2.91 ± 0.02, and 3.21 ± 0.05 eV, respectively. Global structural searches are performed for both the anions and their neutrals. The calculated electronic binding energies are compared with experimental measurements to establish the anion global-minimum structures and their corresponding neutral states. The ground-state structures of these clusters are shown to be planar or quasi-planar with an elongated B6core, to which the first and second Au atoms are bonded terminally and the third Au in a bridging position. All three anion clusters are π antiaromatic. Natural bond orbital analyses show that the $\ce{B-Au}$ bonding is highly covalent, providing new examples for the $\ce{Au/H}$ analogy in Au alloy clusters.