Refers to
Adsorption of phenylphosphonic acid on rutile TiO2(110)
Surface Science, Volume 698, August 2020, Pages 121612
Julia Köbl, Daniel Wechsler, Elmar Y. Kataev, Federico J. Williams, Nataliya Tsud, Stefano Franchi, Hans-Peter Steinrück, Ole Lytken
Conclusion: "Both monolayers possess essentially the same electronic structure with molecules tilted TILDE OPERATOR+D9125° with respect to the surface normal and with either a random azimuthal orientation or a 45° one."