  We have performed shell model calculations for neutron deficient even
$^{102-108}$Sn and odd $^{103-107}$Sn isotopes in $sdg_{7/2}h_{11/2}$ model
space using two different interactions. The first set of interaction is due to
Brown {\it et al.} and second is due to Hoska {\it et al}. The calculations
have been performed using doubly magic $^{100}$Sn as core and valence neutrons
are distributed over the single particle orbits 1$g_{7/2}$, 2$d_{5/2}$,
2$d_{3/2}$, 3$s_{1/2}$ and 1$h_{11/2}$. In more recent experimental work for
$^{101}$Sn [Phys. Rev. Lett. {\bf 105} (2010) 162502], the g.s. is predicted as
5/2$^+$ with excited 7/2$^+$ at 172 keV. We have also performed another two set
of calculations by taking difference in single particle energies of 2$d_{5/2}$
and 1$g_{7/2}$ orbitals by 172 keV. The present state-of-the-art shell model
calculations predicts fair agreements with the experimental data. These
calculations serve as a test of nuclear shell model in the region far from
stability for unstable Sn isotopes near the doubly magic $^{100}$Sn core.
