Gallium trichloride reacted with [(tBuNP)2(tBuNLi·THF)2] or [(tBuNP)2(PhNLi·THF)2] to form {[(tBuNP)2(tBuN)2]GaCl}, 1, and {[(tBuNP)2(PhN)2]GaCl·THF}, 3, respectively. Treatment of either gallium complex with [(tBuNP)2(tBuNLi·THF)2] produced {[(tBuNP)2(RN)2]Ga(tBuNPNtBu)}, R = tBu (2), R = Ph (4), respectively. The complexes 1 and 2 were X-ray structurally characterized, and 2 was shown to contain a 1,3-diaza-2λ2-phosphaallyl ligand. Compound 1 has Cs symmetry and crystallizes with two molecules in a monoclinic unit cell, space group P21/m (No. 11), having dimensions (213 K) a = 9.5478(6) Å, b = 11.9540(7) Å, c = 97.808(1) Å, β = 97.808(1)°. The crystal data (213 K) for 2 are orthorhombic, space group Pnma (No. 62), a = 19.0514(2) Å, b = 17.5082(1) Å, c = 9.6695(1) Å, and Z = 4.