$comment
SF-CIS
$end

$molecule
0 3
 C
 C   1 cc
 C   2 cc        1 ccc
 C   3 cc        2 ccc         1 dihc
 H   1 hc        2 hcc         3 dihh
 H   2 hc        3 hcc         4 dihh
 H   3 hc        4 hcc         1 dihh
 H   4 hc        1 hcc         2 dihh

cc         1.439000
ccc         90.000
ccc         90.000
dihc          0.000
hc         1.073000
hcc        135.000
dihh        180.000
$end

$rem
JOBTYPE = sp
METHOD = HF
BASIS = CC-PVTZ
PURECART = 2222
SCF_CONVERGENCE = 9
THRESH = 12 
MAX_SCF_CYCLES = 100
MAX_CIS_CYCLES = 100
SPIN_FLIP = TRUE 
UNRESTRICTED = TRUE
CIS_N_ROOTS = 20 
CIS_SINGLETS = TRUE
RPA = FALSE
$end