Room temperature gravimetric measurements of hydrogen absorption in nanoscale titanium-benzene complexes formed through reactive pulsed laser deposition (PLD) in an ultra-high vacuum chamber are reported. For complexes synthesized under the conditions of low benzene pressure (35 millitorr) a 6% by weight absorption is observed. This is in agreement with recent calculations based on density functional theory. For samples synthesized under higher benzene pressures a systematic degradation of the hydrogen absorption is observed similar to that reported earlier by us for transition metal ethylene complexes. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.